CN109487073A - High-frequency vibration aging system and method based on high-order strain vibration shape feedback control - Google Patents
High-frequency vibration aging system and method based on high-order strain vibration shape feedback control Download PDFInfo
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- CN109487073A CN109487073A CN201910047316.9A CN201910047316A CN109487073A CN 109487073 A CN109487073 A CN 109487073A CN 201910047316 A CN201910047316 A CN 201910047316A CN 109487073 A CN109487073 A CN 109487073A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
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Abstract
High-frequency vibration aging system based on high-order strain vibration shape feedback control includes master system, signal generator, power amplifier, high-frequency vibration equipment, high-frequency vibratory energy amplifying device, acceleration transducer, charge amplifier, oscillograph, strain gauge transducer, dynamic strain indicator and data collecting card.High-frequency vibration aging process based on high-order strain vibration shape feedback control strains the high-order strain signal characteristic stored in vibration shape property data base by comparing the high-order that the high-order collected in real time strain vibration shape feature and crackle are formed and extended, when the two has the characteristics that similar, control information can be generated, is finally reached adjustment high-frequency vibration aging technique parameter to ensure to carry out structural member the purpose of safe high-frequency vibration ageing treatment.High-frequency vibration timeliness and method proposed by the present invention based on high-order strain vibration shape feedback control has the advantages that structural member can be carried out the application range of safe high-frequency vibration ageing treatment and extended high frequency oscillating aging.
Description
Technical field
The present invention relates to vibration aging technology fields, refer in particular to a kind of high-frequency vibration based on high-order strain vibration shape feedback control
Aging system and method.
Technical background
In current method for removing residual stress, vibration aging technology is since eradicating efficacy is good, energy conservation and environmental protection, is easy to existing
Operation, it is high-efficient the advantages that and by machining manufacturing technology field enterprise favor.Vibration aging technology is to utilize
The vibrational energy of input makes component generate plastic deformation, to achieve the purpose that eliminate residual stress.High-frequency vibration ageing technique
Due to excited frequency height, the application range of vibration aging technology is extended, however structural member is in high-frequency vibration ageing process
In, due to technological parameter formulate it is unreasonable, it is easy to cause structural member to generate certain damage, the most typically is exactly in material
Material is internal to generate microfissure defect, from the mesh for improving structural member service life by high-frequency vibration ageing treatment without reaching
, the service life of structural member is reduced because of the generation of microfissure defect instead.
When carrying out high-frequency vibration ageing treatment to structural member, it is necessary to pay close attention to shape of the structural member under high frequency vibrating dynamic load effect
State, and when formulating high-frequency vibration aging technique parameter, should whether generation and expansion be as critical item using microfissure defect
Part, this is just it needs to be determined that when high-frequency vibration aging technique parameter, while acquisition is able to reflect structural member microfissure defect back
The signal of state, and microfissure defect state signal is analyzed, to formulate more reasonable high-frequency vibration timeliness work
Skill parameter is fed back the signal for being able to reflect structural member microfissure defect state of acquisition back to high-frequency vibration timeliness system
In system, so that high-frequency vibration aging system forms a closed-loop control system.However, the high-frequency vibration timeliness applied at present
System is all open cycle system, when formulating high-frequency vibration aging technique parameter it is not intended that whether generating microcosmic split inside structural member
Whether line defect and microfissure defect extend, and the high-frequency vibration aging technique parameter formulated in this way carries out high-frequency vibration timeliness
Structural member is easily lead to when processing generates certain damage (the excessive damage for causing structural member of high-frequency vibratory energy or high frequency vibrating
Dynamic overlong time generates accumulated damage), so if carrying out high frequency vibrating to structural member using current high-frequency vibration aging system
When dynamic ageing treatment, it is easy to cause to generate microfissure defect inside structural member, and microfissure defect is caused further to expand
Expansion comes, to reduce the service life of structural member.In conclusion what type sensor which kind of to acquire using is able to reflect knot
The signal of component microfissure defect state, and by signal feedback into high-frequency vibration aging system, when as high-frequency vibration
The foundation that technological parameter is formulated is imitated, so that high-frequency vibration aging system is formed closed-loop control system, to obtain reasonable high frequency vibrating
Dynamic aging technique parameter, has become a current high-frequency vibration aging system key in the urgent need to address in practical application
Problem also seriously restricts the application of high-frequency vibration aging system.
When structural member generates microfissure defect during effect loaded, the intrinsic frequency of structural member, displacement vibration
The parameter of the reflection structural member natural vibration characteristics such as type, the strain vibration shape can change, i.e., the modal parameter of structural member can occur
Variation, wherein the strain vibration shape is more significant relative to displacement vibration shape variation, i.e. the strain vibration shape is more sensitive to microfissure defect,
And it is more sensitive to microfissure defect relative to the low order strain vibration shape that high-order strains the vibration shape.Therefore, high-order is strained into the vibration shape
Applied to judging whether structural member microfissure defect in high-frequency vibration ag(e)ing process forms and whether is microfissure defect
Further expand come be it is feasible, therefore the present invention by high-order strain the vibration shape be fused to current high-frequency vibration aging system
In, to propose a kind of high-frequency vibration aging system and method based on high-order strain vibration shape feedback control, energy on this basis
Enough overcome existing open ring type high-frequency vibration aging system and method when formulating high-frequency vibration aging technique parameter it is not intended that knot
Whether component inside generates the deficiency whether microfissure defect and microfissure defect further expand, so that structure
The safe high-frequency vibration ageing treatment of part is possibly realized, the popularization and application of final power-assisted high-frequency vibration ageing technique, and is height
The research of frequency vibration aging system and method provides new thinking and direction.
Summary of the invention
In order to overcome existing open ring type high-frequency vibration aging system and method when formulating high-frequency vibration aging technique parameter
It is not intended that the deficiency whether microfissure defect and microfissure defect further expand whether is generated inside structural member, this
Invention proposes a kind of high-frequency vibration aging system and method based on high-order strain vibration shape feedback control, i.e., high-order is strained the vibration shape
It is fused in current open ring type high-frequency vibration aging system, using strain gauge transducer to the structure in high-frequency vibration ag(e)ing process
Part carries out non-destructive monitoring, and by obtained high-order strain vibration shape feedback into high-frequency vibration aging system, and then formulates high frequency vibrating
Dynamic aging technique parameter is to ensure that it is microcosmic that the high-frequency vibratory energy of high-frequency vibration aging system output will not cause structural member to generate
Crack defect and the microfissure defect generated will not be caused to further expand, that is, be formed with the microfissure of structural member
Feedback control type high-frequency vibration aging system and method for the defect as starting point strain vibration shape feedback control using based on high-order
High-frequency vibration aging system and method to structural member carry out high-frequency vibration ageing treatment, enable to the safe high frequency of structural member
Vibration stress relief treatment is possibly realized.
Based on high-order strain vibration shape feedback control high-frequency vibration aging system include master system, signal generator,
Power amplifier, high-frequency vibration equipment, high-frequency vibratory energy amplifying device, acceleration transducer, charge amplifier, oscillograph,
Strain gauge transducer, dynamic strain indicator and data collecting card；The high-frequency vibratory energy amplifying device is fixed on high-frequency vibration
The upper surface of equipment moving component, the structural member are fixed on the upper surface of high-frequency vibratory energy amplifying device, and described adds
Velocity sensor is installed on the structural member upper surface, the input of the acceleration transducer and the charge amplifier
Channel connection, the output channel of the charge amplifier are connect with the input channel of the oscillograph, the oscillograph
Output channel connect with the master system, the strain gauge transducer is pasted onto the structural member upper surface,
The strain gauge transducer is connect with the input channel of the dynamic strain indicator, the output channel of the dynamic strain indicator
It is connect with the input channel of the data collecting card, the output channel of the data collecting card and the master system
Connection；
The master system includes obtaining the collected high-order strain signal of strain gauge transducer from data collecting card
High-order strain signal obtain module, high-order strain signal feature obtain module, crackle formed and extension high-order strain the vibration shape
Property data base, control information storage module, high-frequency vibration aging process module, drives at high-order strain vibration shape feature comparison module
Move information storage module, the voltage waveform for the voltage waveform for obtaining oscilloscope display obtains module, the extraction electricity from voltage waveform
Voltage peak is converted to the vibration level conversion module of output vibration level by the voltage peak extraction module of voltage crest value；
Master system control signal generator output amplitude and frequency independence and continuously adjustable sine excitation signal；
The sine excitation signal of signal generator output generates vibration by power amplifier, driving high-frequency vibration equipment.
Further, the high-order strain signal feature obtains the amplitude that module is used to extract high-order strain waveform.At this
In invention specific implementation process, reflect that microfissure defect strains the vibration shape to high-order using the amplitude for extracting high-order strain waveform
Influence, i.e., using feature of the amplitude as the high-order strain signal of the high-order strain waveform.
Further, the voltage waveform obtains the voltage waveform that module obtains oscilloscope display, the voltage peak
Extraction module extracts voltage peak from voltage waveform, and voltage peak is converted to output vibration level by the vibration level conversion module.
In specific implementation process of the present invention, the dynamic stress on structural member is acted on using the vibration level characterization acted on structural member.Add
Sensitirity va1ue s (the pC/ms of velocity sensor-2), the sensitivity coefficient S (pC/Unit) of charge amplifier input terminal, amplification coefficient
F (Unit/V), voltage peak U (V), the transformational relation acted between vibration level and voltage peak on structural member areWherein a indicates the vibration level acted on structural member.
Further, the crackle is formed and the strain vibration shape property data base storage of the high-order of extension has structural member development
Damaging high-frequency vibration timeliness tests accumulated magnanimity high-order strain signal characteristic；The high-order strain vibration shape is special
The high-order strain vibration shape that the high-order strain vibration shape feature and crackle that sign comparison module collects in real time are formed and extended is special
The high-order strain signal feature stored in sign database；The described high-order strain vibration shape feature collected in real time and described
The high-order strain signal feature stored in the high-order strain vibration shape property data base of crackle formation and extension has the characteristics that similar
When, the high-order strain vibration shape feature comparison module can generate control information, and be stored in the control information storage mould
Block, and then technological parameter of the high-frequency vibration aging process module corrective action on structural member is controlled, and the height
Frequency vibration aging process module can generate activation bit, and be stored in the activation bit memory module, and then described in driving
High-frequency vibration equipment technological parameter after the adjustment under high-frequency vibration ageing treatment, such adjustment process are carried out to structural member
Not generate, microfissure defect is formed and the high-order strain signal of extension is boundary.
Further, the high-frequency vibration aging process module has structural member and generates the formation of microfissure defect and extend
High-order strain signal when high-frequency vibration aging technique parameter adjust rule；The high-frequency vibration aging technique parameter includes
Excited frequency, exciting vibration level and exciting time；The adjustment rule include chosen in excited frequency selection range it is lesser
Excited frequency, chosen in exciting vibration level selection range lesser exciting vibration level, choose in exciting time selection range it is shorter
The exciting time.The key process parameter of high-frequency vibration timeliness, i.e. exciting are concerned in specific implementation process of the invention
Frequency, exciting vibration level and exciting time.When starting to carry out high-frequency vibration ageing treatment to structural member, according to Vibration Aging Process state
Family's standard (GB-T 25712-2010 " Vibration Aging Process parameter selection and effective evaluation method ") determines excited frequency, exciting
The selection range of vibration level and exciting time, and choose specific process parameter value in selection range and high frequency vibrating is carried out to structural member
Dynamic ageing treatment is easy to cause structural member to generate certain damage when the high-frequency vibration aging technique parameter value of selection is improper
Wound, to generate corresponding high-order strain signal, just need at this time to the technological parameter of structural member high-frequency vibration ageing treatment into
Row adjustment.Adjusting rule includes lesser excited frequency being chosen in excited frequency selection range or in exciting vibration level selection range
It is interior to choose lesser exciting vibration level to reduce the high-frequency vibratory energy acted on structural member, it is selected in exciting time selection range
The shorter exciting time is taken to generate accumulated damage to avoid to structural member.In this way to the high-frequency vibration aging technique of structural member
Parameter is adjusted, and can generate damage to avoid structural member, it is ensured that structural member is able to carry out safe high-frequency vibration ageing treatment.
Further, the strain gauge transducer is resistance strain.
Further, the acceleration transducer is piezoelectric acceleration transducer.
Specifically, the high-frequency vibration aging system proposed by the present invention based on high-order strain vibration shape feedback control was implemented
Journey is as follows:
In specific implementation process of the present invention, acted on using the vibration level characterization acted on structural member dynamic on structural member
Stress is first depending on the selection range that Vibration Aging Process national standard determines high-frequency vibration timeliness excited frequency, determines high frequency
The selection range of oscillating aging exciting vibration level determines the selection range of high-frequency vibration timeliness exciting time, then in excited frequency
High-frequency vibration ageing treatment is carried out to structural member with specific process parameter value is chosen in exciting vibration level selection range, when in determination
Excited frequency and exciting vibration level under when carrying out high-frequency vibration ageing treatment to structural member, act on the height on the structural member
What frequency vibration energy was easy to cause that structural member forms that microfissure defect or cause formed on structural member when excessive microcosmic splits
Line defect further expands, and carries out high-frequency vibration ageing treatment under excessive high-frequency vibratory energy effect so as to cause structural member
When can generate corresponding high-order strain signal, or the high-frequency vibration ageing treatment for carrying out the long period to structural member generates accumulation
Damage carries out feature extraction, and and flaw shape to high-order strain signal at this time to can also generate corresponding high-order strain signal
It is real at the high-frequency vibration timeliness for carrying out haveing damage property to structural member stored in the high-order strain vibration shape property data base with extension
It tests accumulated magnanimity high-order strain signal characteristic to be compared, if the high-order strain vibration shape feature collected in real time
The high-order strain signal feature stored in the high-order strain vibration shape property data base for being formed and being extended with crackle has similar spy
When point, high-order strain vibration shape feature comparison module can generate control information, and be stored in control information storage module, and then control
Technological parameter of the high-frequency vibration aging process module corrective action on structural member, and high-frequency vibration aging process module can generate
Activation bit, and it is stored in activation bit memory module, and then right under the technological parameter of driving high-frequency vibration equipment after the adjustment
Structural member carries out high-frequency vibration ageing treatment, and such adjustment process is not to generate the high-order that microfissure defect is formed and extended
Strain signal is boundary.When the microfissure defect that structural member generates microfissure defect or generated further expands,
The amplitude of the high-order strain signal can mutate.The adjustment rule includes choosing in excited frequency selection range
Lesser excited frequency chooses lesser exciting vibration level in exciting vibration level selection range, selects in exciting time selection range
Take the shorter exciting time.Lesser excited frequency is chosen in excited frequency selection range or in exciting vibration level selection range
Choosing lesser exciting vibration level can reduce the high-frequency vibratory energy acted on structural member, in exciting time selection range
The shorter exciting time is chosen to avoid to structural member generation accumulated damage.The high-order strain vibration shape collected in real time
The high-order strain signal feature stored in feature and the high-order strain vibration shape property data base that crackle is formed and extended has similar
The characteristics of refer to the high-order collected in real time strain vibration shape feature mutate.
Based on high-order strain vibration shape feedback control high-frequency vibration aging process the following steps are included:
(1), high-frequency vibratory energy amplifying device is fixedly connected with high-frequency vibration equipment；By structural member and high-frequency vibration energy
Amount amplifying device is fixedly connected；Acceleration transducer and strain gauge transducer are mounted on structural member；Connect signal link；It connects
Energization source；
(2), according to Vibration Aging Process national standard, the selection range of high-frequency vibration aging technique parameter is determined, including
The selection for determining the selection range of structural member high-frequency vibration timeliness excited frequency, determining structural member high-frequency vibration timeliness exciting vibration level
Range, the selection range for determining the structural member high-frequency vibration timeliness exciting time；
(3), carry out the high-frequency vibration ageing treatment of haveing damage property, the high-order strain signal in master system to structural member
Feature obtains the feature that module extracts collected high-order strain signal, and the magnanimity high-order strain signal characteristic that will be obtained
The high-order that crackle is formed and extended is stored to strain in vibration shape property data base；
(4), chosen in the selection range of high-frequency vibration aging technique parameter specific process parameter value to structural member into
Row high-frequency vibration ageing treatment；
(5), strain gauge transducer is monitored structural member high-frequency vibration ag(e)ing process, if the height collected in real time
The high-order strain signal stored in rank strain vibration shape feature and crackle formation and the high-order strain vibration shape property data base extended is special
When sign has the characteristics that similar, the high-order strain vibration shape feature comparison module in master system can generate control information, control
Technological parameter of the high-frequency vibration aging process module corrective action on structural member, and high-frequency vibration aging process module can generate
Activation bit drives and carries out high-frequency vibration ageing treatment to structural member under the technological parameter of high-frequency vibration equipment after the adjustment, this
The adjustment process of sample is not to generate the high-order strain signal of the formation of microfissure defect and extension as boundary.
Further, the signal link includes the signal link between master system and signal generator；Signal hair
Signal link between raw device and power amplifier；Signal link between power amplifier and high-frequency vibration equipment；Acceleration
Signal link between sensor and charge amplifier；Signal link between charge amplifier and oscillograph；Oscillograph with it is upper
Signal link between the machine system of position；Signal link between strain gauge transducer and dynamic strain indicator；Dynamic strain indicator and number
According to the signal link between capture card；Signal link between data collecting card and master system；The power supply includes upper
Position machine system, signal generator, power amplifier, high-frequency vibration equipment, charge amplifier, oscillograph, dynamic strain indicator sum number
According to the power supply of capture card.
Beneficial effects of the present invention are as follows:
1, the high-frequency vibration aging system and method proposed by the present invention based on high-order strain vibration shape feedback control is used and is answered
Variant sensor is monitored high-frequency vibration ag(e)ing process, belongs to lossless detection method.
2, the high-frequency vibration aging system and method proposed by the present invention based on high-order strain vibration shape feedback control is used and is answered
Variant sensor is monitored high-frequency vibration ag(e)ing process, belongs to dynamic real-time monitor technology, can find and monitor in real time
The formation and development process of microfissure defect, accordingly ensure that can be using proposed by the present invention anti-based on the high-order strain vibration shape
The high-frequency vibration aging system and method for presenting control carry out the high-frequency vibration ageing treatment of safety to structural member.
3, the high-frequency vibration aging system and method proposed by the present invention based on high-order strain vibration shape feedback control, which belongs to, closes
The high-frequency vibration aging system of ring control is to feed back high-order strain signal into current open ring type high-frequency vibration aging system,
And then formulation high-frequency vibration aging technique parameter will not be caused with the high-frequency vibratory energy for ensuring the output of high-frequency vibration aging system
The formation or extension of structural member microfissure defect form the feedback control using the microfissure defect of structural member as starting point
Type high-frequency vibration aging system processed and method, are conducive to the application range of extended high frequency oscillating aging.
4, the high-frequency vibration aging system and method proposed by the present invention based on high-order strain vibration shape feedback control is to structure
When part carries out high-frequency vibration ageing treatment, treatment process is controlled by master system, reduces operator's
Workload is conducive to the efficiency for improving high-frequency vibration ageing treatment.
Detailed description of the invention
High-frequency vibration aging system schematic diagram of the Fig. 1 based on high-order strain vibration shape feedback control.
High-frequency vibration aging process schematic diagram of the Fig. 2 based on high-order strain vibration shape feedback control.
Structural member schematic diagram of the Fig. 3 without microfissure defect.
Fig. 4 has the structural member schematic diagram of microfissure defect.
The Numerical results of Fig. 5 a modal displacement.
The Numerical results of Fig. 5 b modal strain.
Specific embodiment
Referring to attached drawing, the present invention is further illustrated:
Based on high-order strain vibration shape feedback control high-frequency vibration aging system include master system, signal generator,
Power amplifier, high-frequency vibration equipment, high-frequency vibratory energy amplifying device, acceleration transducer, charge amplifier, oscillograph,
Strain gauge transducer, dynamic strain indicator and data collecting card；The high-frequency vibratory energy amplifying device is fixed on high-frequency vibration
The upper surface of equipment moving component, the structural member are fixed on the upper surface of high-frequency vibratory energy amplifying device, and described adds
Velocity sensor is installed on the structural member upper surface, the input of the acceleration transducer and the charge amplifier
Channel connection, the output channel of the charge amplifier are connect with the input channel of the oscillograph, the oscillograph
Output channel connect with the master system, the strain gauge transducer is pasted onto the structural member upper surface,
The strain gauge transducer is connect with the input channel of the dynamic strain indicator, the output channel of the dynamic strain indicator
It is connect with the input channel of the data collecting card, the output channel of the data collecting card and the master system
Connection；
The master system includes obtaining the collected high-order strain signal of strain gauge transducer from data collecting card
High-order strain signal obtain module, high-order strain signal feature obtain module, crackle formed and extension high-order strain the vibration shape
Property data base, control information storage module, high-frequency vibration aging process module, drives at high-order strain vibration shape feature comparison module
Move information storage module, the voltage waveform for the voltage waveform for obtaining oscilloscope display obtains module, the extraction electricity from voltage waveform
Voltage peak is converted to the vibration level conversion module of output vibration level by the voltage peak extraction module of voltage crest value；
Master system control signal generator output amplitude and frequency independence and continuously adjustable sine excitation signal；
The sine excitation signal of signal generator output generates vibration by power amplifier, driving high-frequency vibration equipment.
Further, the high-order strain signal feature obtains the amplitude that module is used to extract high-order strain waveform.At this
In invention specific implementation process, reflect that microfissure defect strains the vibration shape to high-order using the amplitude for extracting high-order strain waveform
Influence, i.e., using feature of the amplitude as the high-order strain signal of the high-order strain waveform.
Further, the voltage waveform obtains the voltage waveform that module obtains oscilloscope display, the voltage peak
Extraction module extracts voltage peak from voltage waveform, and voltage peak is converted to output vibration level by the vibration level conversion module.
In specific implementation process of the present invention, the dynamic stress on structural member is acted on using the vibration level characterization acted on structural member.Add
Sensitirity va1ue s (the pC/ms of velocity sensor-2), the sensitivity coefficient S (pC/Unit) of charge amplifier input terminal, amplification coefficient
F (Unit/V), voltage peak U (V), the transformational relation acted between vibration level and voltage peak on structural member areWherein a indicates the vibration level acted on structural member.
Further, the crackle is formed and the strain vibration shape property data base storage of the high-order of extension has structural member development
Damaging high-frequency vibration timeliness tests accumulated magnanimity high-order strain signal characteristic；The high-order strain vibration shape is special
The high-order strain vibration shape that the high-order strain vibration shape feature and crackle that sign comparison module collects in real time are formed and extended is special
The high-order strain signal feature stored in sign database；The described high-order strain vibration shape feature collected in real time and described
The high-order strain signal feature stored in the high-order strain vibration shape property data base of crackle formation and extension has the characteristics that similar
When, the high-order strain vibration shape feature comparison module can generate control information, and be stored in the control information storage mould
Block, and then technological parameter of the high-frequency vibration aging process module corrective action on structural member is controlled, and the height
Frequency vibration aging process module can generate activation bit, and be stored in the activation bit memory module, and then described in driving
High-frequency vibration equipment technological parameter after the adjustment under high-frequency vibration ageing treatment, such adjustment process are carried out to structural member
Not generate, microfissure defect is formed and the high-order strain signal of extension is boundary.
Further, the high-frequency vibration aging process module has structural member and generates the formation of microfissure defect and extend
High-order strain signal when high-frequency vibration aging technique parameter adjust rule；The high-frequency vibration aging technique parameter includes
Excited frequency, exciting vibration level and exciting time；The adjustment rule include chosen in excited frequency selection range it is lesser
Excited frequency, chosen in exciting vibration level selection range lesser exciting vibration level, choose in exciting time selection range it is shorter
The exciting time.The key process parameter of high-frequency vibration timeliness, i.e. exciting are concerned in specific implementation process of the invention
Frequency, exciting vibration level and exciting time.When starting to carry out high-frequency vibration ageing treatment to structural member, according to Vibration Aging Process state
Family's standard (GB-T 25712-2010 " Vibration Aging Process parameter selection and effective evaluation method ") determines excited frequency, exciting
The selection range of vibration level and exciting time, and choose specific process parameter value in selection range and high frequency vibrating is carried out to structural member
Dynamic ageing treatment is easy to cause structural member to generate certain damage when the high-frequency vibration aging technique parameter value of selection is improper
Wound, to generate corresponding high-order strain signal, just need at this time to the technological parameter of structural member high-frequency vibration ageing treatment into
Row adjustment.Adjusting rule includes lesser excited frequency being chosen in excited frequency selection range or in exciting vibration level selection range
It is interior to choose lesser exciting vibration level to reduce the high-frequency vibratory energy acted on structural member, it is selected in exciting time selection range
The shorter exciting time is taken to generate accumulated damage to avoid to structural member.In this way to the high-frequency vibration aging technique of structural member
Parameter is adjusted, and can generate damage to avoid structural member, it is ensured that structural member is able to carry out safe high-frequency vibration ageing treatment.
Further, the strain gauge transducer is resistance strain.
Further, the acceleration transducer is piezoelectric acceleration transducer.
Specifically, the high-frequency vibration aging system proposed by the present invention based on high-order strain vibration shape feedback control was implemented
Journey is as follows:
In specific implementation process of the present invention, acted on using the vibration level characterization acted on structural member dynamic on structural member
Stress is first depending on the selection range that Vibration Aging Process national standard determines high-frequency vibration timeliness excited frequency, determines high frequency
The selection range of oscillating aging exciting vibration level determines the selection range of high-frequency vibration timeliness exciting time, then in excited frequency
High-frequency vibration ageing treatment is carried out to structural member with specific process parameter value is chosen in exciting vibration level selection range, when in determination
Excited frequency and exciting vibration level under when carrying out high-frequency vibration ageing treatment to structural member, act on the height on the structural member
What frequency vibration energy was easy to cause that structural member forms that microfissure defect or cause formed on structural member when excessive microcosmic splits
Line defect further expands, and carries out high-frequency vibration ageing treatment under excessive high-frequency vibratory energy effect so as to cause structural member
When can generate corresponding high-order strain signal, or the high-frequency vibration ageing treatment for carrying out the long period to structural member generates accumulation
Damage carries out feature extraction, and and flaw shape to high-order strain signal at this time to can also generate corresponding high-order strain signal
It is real at the high-frequency vibration timeliness for carrying out haveing damage property to structural member stored in the high-order strain vibration shape property data base with extension
It tests accumulated magnanimity high-order strain signal characteristic to be compared, if the high-order strain vibration shape feature collected in real time
The high-order strain signal feature stored in the high-order strain vibration shape property data base for being formed and being extended with crackle has similar spy
When point, high-order strain vibration shape feature comparison module can generate control information, and be stored in control information storage module, and then control
Technological parameter of the high-frequency vibration aging process module corrective action on structural member, and high-frequency vibration aging process module can generate
Activation bit, and it is stored in activation bit memory module, and then right under the technological parameter of driving high-frequency vibration equipment after the adjustment
Structural member carries out high-frequency vibration ageing treatment, and such adjustment process is not to generate the high-order that microfissure defect is formed and extended
Strain signal is boundary.When the microfissure defect that structural member generates microfissure defect or generated further expands,
The amplitude of the high-order strain signal can mutate.The adjustment rule includes choosing in excited frequency selection range
Lesser excited frequency chooses lesser exciting vibration level in exciting vibration level selection range, selects in exciting time selection range
Take the shorter exciting time.Lesser excited frequency is chosen in excited frequency selection range or in exciting vibration level selection range
Choosing lesser exciting vibration level can reduce the high-frequency vibratory energy acted on structural member, in exciting time selection range
The shorter exciting time is chosen to avoid to structural member generation accumulated damage.The high-order strain vibration shape collected in real time
The high-order strain signal feature stored in feature and the high-order strain vibration shape property data base that crackle is formed and extended has similar
The characteristics of refer to the high-order collected in real time strain vibration shape feature mutate.
Based on high-order strain vibration shape feedback control high-frequency vibration aging process the following steps are included:
(1), high-frequency vibratory energy amplifying device is fixedly connected with high-frequency vibration equipment；By structural member and high-frequency vibration energy
Amount amplifying device is fixedly connected；Acceleration transducer and strain gauge transducer are mounted on structural member；Connect signal link；It connects
Energization source；
(2), according to Vibration Aging Process national standard, the selection range of high-frequency vibration aging technique parameter is determined, including
The selection for determining the selection range of structural member high-frequency vibration timeliness excited frequency, determining structural member high-frequency vibration timeliness exciting vibration level
Range, the selection range for determining the structural member high-frequency vibration timeliness exciting time；
(3), carry out the high-frequency vibration ageing treatment of haveing damage property, the high-order strain signal in master system to structural member
Feature obtains the feature that module extracts collected high-order strain signal, and the magnanimity high-order strain signal characteristic that will be obtained
The high-order that crackle is formed and extended is stored to strain in vibration shape property data base；
(4), chosen in the selection range of high-frequency vibration aging technique parameter specific process parameter value to structural member into
Row high-frequency vibration ageing treatment；
(5), strain gauge transducer is monitored structural member high-frequency vibration ag(e)ing process, if the height collected in real time
The high-order strain signal stored in rank strain vibration shape feature and crackle formation and the high-order strain vibration shape property data base extended is special
When sign has the characteristics that similar, the high-order strain vibration shape feature comparison module in master system can generate control information, control
Technological parameter of the high-frequency vibration aging process module corrective action on structural member, and high-frequency vibration aging process module can generate
Activation bit drives and carries out high-frequency vibration ageing treatment to structural member under the technological parameter of high-frequency vibration equipment after the adjustment, this
The adjustment process of sample is not to generate the high-order strain signal of the formation of microfissure defect and extension as boundary.
Further, the signal link includes the signal link between master system and signal generator；Signal hair
Signal link between raw device and power amplifier；Signal link between power amplifier and high-frequency vibration equipment；Acceleration
Signal link between sensor and charge amplifier；Signal link between charge amplifier and oscillograph；Oscillograph with it is upper
Signal link between the machine system of position；Signal link between strain gauge transducer and dynamic strain indicator；Dynamic strain indicator and number
According to the signal link between capture card；Signal link between data collecting card and master system；The power supply includes upper
Position machine system, signal generator, power amplifier, high-frequency vibration equipment, charge amplifier, oscillograph, dynamic strain indicator sum number
According to the power supply of capture card.
In specific implementation process of the present invention, it is as follows that the reason of vibration shape is as feedback quantity is strained using high-order: to Fig. 3 without micro-
There is the structural member and Fig. 4 for seeing crack defect the structural member of microfissure defect to carry out numerical value model analysis.Shown in Fig. 3 and Fig. 4
The length of structural member be 230mm, width is 210mm, and thickness is 6mm, for the ease of by Fig. 3 and knot shown in Fig. 4
Component is fixed on the upper surface of high-frequency vibratory energy amplifying device, on Fig. 3 and structural member shown in Fig. 4 there are radius be 4mm
Mounting hole, the distance between mounting hole is 80mm, and the length of the microfissure in Fig. 4 is 2mm, width 0.2mm, with a thickness of
0.2mm.Influence first using the presence of the technique study microfissure of numerical analysis to modal displacement and modal strain, research
Along the modal displacement of specific direction (i.e. the length direction of structural member) and the regularity of distribution of modal strain, wherein being split without microcosmic
The regularity of distribution of the modal displacement of the structural member of line and the structural member with microfissure is as shown in Figure 5 a；Knot without microfissure
The regularity of distribution of the modal strain of component and the structural member with microfissure is as shown in Figure 5 b.From Fig. 5 a as it can be seen that being split without microcosmic
The mode position of first-order flexure the displacement vibration shape and the five rank bending displacement vibration shapes of the structural member of line and the structural member with microfissure
Shifting value overlaps, even if first-order flexure is displaced the mode position of the vibration shape and the five rank bending displacement vibration shapes at microfissure
Shifting value does not also change significantly, and shows modal displacement to microfissure and insensitive.From Fig. 5 b as it can be seen that the knot without microfissure
The modal strain value of the first-order flexure strain vibration shape and the five rank bending strain vibration shapes of component and the structural member with microfissure exists
Place other than microfissure is substantially to overlap, but the first-order flexure strain vibration shape and five ranks are curved at microfissure
Apparent mutation but has occurred in the modal strain value of the curved strain vibration shape, shows that modal strain is sensitive to microfissure, and
Mutation of the modal strain value of the five rank bending strain vibration shapes at microfissure is more obvious, this shows through detection structure part
High-order strain signal, and by obtained high-order strain signal profile feedback into high-frequency vibration aging system, it forms the present invention and mentions
The high-frequency vibration aging system and method based on high-order strain vibration shape feedback control out, and using proposed by the present invention based on height
Rank strains the high-frequency vibration aging system of vibration shape feedback control and method carries out high-frequency vibration ageing treatment, Neng Goushi to structural member
The purpose of the safe high-frequency vibration ageing treatment of existing structural member, and provided newly for the research of high-frequency vibration aging system and method
Direction.
Content described in this specification embodiment is only enumerating to the way of realization of inventive concept, protection of the invention
Range should not be construed as being limited to the specific forms stated in the embodiments, and protection scope of the present invention is also and in art technology
Personnel conceive according to the present invention it is conceivable that equivalent technologies mean.
Claims (8)
1. the high-frequency vibration aging system based on high-order strain vibration shape feedback control includes master system, signal generator, function
Rate amplifier, high-frequency vibratory energy amplifying device, acceleration transducer, charge amplifier, oscillograph, is answered at high-frequency vibration equipment
Variant sensor, dynamic strain indicator and data collecting card；The high-frequency vibratory energy amplifying device is fixed on high-frequency vibration and sets
The upper surface of received shipment dynamic component, the structural member are fixed on the upper surface of high-frequency vibratory energy amplifying device, the acceleration
Degree sensor is installed on the structural member upper surface, and the input of the acceleration transducer and the charge amplifier is logical
Road connection, the output channel of the charge amplifier are connect with the input channel of the oscillograph, the oscillograph
Output channel is connect with the master system, and the strain gauge transducer is pasted onto the structural member upper surface, institute
The strain gauge transducer stated is connect with the input channel of the dynamic strain indicator, the output channel of the dynamic strain indicator with
The input channel of the data collecting card connects, and the output channel of the data collecting card and the master system connect
It connects；
The master system includes the height that the collected high-order strain signal of strain gauge transducer is obtained from data collecting card
Rank strain signal obtains module, high-order strain signal feature obtains module, crackle is formed and the high-order of extension strains vibration shape feature
Database, high-order strain vibration shape feature comparison module, control information storage module, high-frequency vibration aging process module, driving letter
Memory module, the voltage waveform acquisition module for the voltage waveform for obtaining oscilloscope display are ceased, Voltage Peak is extracted from voltage waveform
Voltage peak is converted to the vibration level conversion module of output vibration level by the voltage peak extraction module of value；
Master system control signal generator output amplitude and frequency independence and continuously adjustable sine excitation signal；Signal
The sine excitation signal of generator output generates vibration by power amplifier, driving high-frequency vibration equipment.
2. such as realizing the high-frequency vibration aging system described in claim 1 based on high-order strain vibration shape feedback control, feature
Be: the high-order strain signal feature obtains the amplitude that module is used to extract high-order strain waveform.
3. such as realizing the high-frequency vibration aging system described in claim 1 based on high-order strain vibration shape feedback control, feature
Be: the voltage waveform obtains the voltage waveform that module obtains oscilloscope display, the voltage peak extraction module from
Voltage peak is extracted in voltage waveform, voltage peak is converted to output vibration level by the vibration level conversion module.
4. such as realizing the high-frequency vibration aging system described in claim 1 based on high-order strain vibration shape feedback control, feature
Be: the crackle is formed and the high-order of extension strain vibration shape property data base stores the height for carrying out haveing damage property to structural member
Frequency vibration timeliness tests accumulated magnanimity high-order strain signal characteristic；The high-order strains vibration shape feature comparison module
In the high-order strain vibration shape property data base for comparing the high-order strain vibration shape feature collected in real time and crackle formation and extension
The high-order strain signal feature of storage；The described high-order strain vibration shape feature collected in real time and the crackle formed and
When the high-order strain signal feature stored in the high-order strain vibration shape property data base of extension has the characteristics that similar, the height
Rank strain vibration shape feature comparison module can generate control information, and be stored in the control information storage module, and then control
Technological parameter of the high-frequency vibration aging process module corrective action on structural member, and efficacious prescriptions when the described high-frequency vibration
Method module can generate activation bit, and be stored in the activation bit memory module, and then the high-frequency vibration is driven to set
High-frequency vibration ageing treatment is carried out to structural member under standby technological parameter after the adjustment, such adjustment process is microcosmic not generate
Crack defect is formed and the high-order strain signal of extension is boundary.
5. such as realizing the high-frequency vibration aging system described in claim 1 based on high-order strain vibration shape feedback control, feature
Be: the high-frequency vibration aging process module has structural member and generates the high-order strain that microfissure defect is formed and extended
High-frequency vibration aging technique parameter when signal adjusts rule；The high-frequency vibration aging technique parameter include excited frequency,
Exciting vibration level and exciting time；The adjustment rule include chosen in excited frequency selection range lesser excited frequency,
When choosing lesser exciting vibration level in exciting vibration level selection range, choosing shorter exciting in exciting time selection range
Between.
6. such as realizing the high-frequency vibration aging system described in claim 1 based on high-order strain vibration shape feedback control, feature
Be: the strain gauge transducer is resistance strain, and the acceleration transducer is piezoelectric type acceleration biography
Sensor.
7. using the high-frequency vibration aging system based on high-order strain vibration shape feedback control as described in claim 1-6, to knot
Component carry out high-frequency vibration ageing treatment method the following steps are included:
(1), high-frequency vibratory energy amplifying device is fixedly connected with high-frequency vibration equipment；Structural member and high-frequency vibratory energy are put
Big device is fixedly connected；Acceleration transducer and strain gauge transducer are mounted on structural member；Connect signal link；Connect electricity
Source；
(2), according to Vibration Aging Process national standard, the selection range of high-frequency vibration aging technique parameter, including determination are determined
The selection range of structural member high-frequency vibration timeliness excited frequency, the selection model for determining structural member high-frequency vibration timeliness exciting vibration level
Enclose, determine the selection range of structural member high-frequency vibration timeliness exciting time；
(3), carry out the high-frequency vibration ageing treatment of haveing damage property, the high-order strain signal feature in master system to structural member
The feature that module extracts collected high-order strain signal is obtained, and obtained magnanimity high-order strain signal characteristic is stored
Into the high-order strain vibration shape property data base that crackle is formed and is extended；
(4), specific process parameter value is chosen in the selection range of high-frequency vibration aging technique parameter, and height is carried out to structural member
Frequency vibration ageing treatment；
(5), strain gauge transducer is monitored structural member high-frequency vibration ag(e)ing process, if the high-order collected in real time is answered
Become vibration shape feature and crackle is formed and the high-order of extension strains the high-order strain signal feature stored in vibration shape property data base and has
When having the characteristics that similar, the high-order strain vibration shape feature comparison module in master system can generate control information, control high frequency
Technological parameter of the oscillation time-effect method module corrective action on structural member, and high-frequency vibration aging process module can generate driving
Information drives and carries out high-frequency vibration ageing treatment to structural member under the technological parameter of high-frequency vibration equipment after the adjustment, such
Adjustment process is not to generate the high-order strain signal of the formation of microfissure defect and extension as boundary.
8. the method for claim 7, it is characterised in that: the signal link includes that master system and signal occur
Signal link between device；Signal link between signal generator and power amplifier；Power amplifier is set with high-frequency vibration
Signal link between standby；Signal link between acceleration transducer and charge amplifier；Charge amplifier and oscillograph it
Between signal link；Signal link between oscillograph and master system；Between strain gauge transducer and dynamic strain indicator
Signal link；Signal link between dynamic strain indicator and data collecting card；Letter between data collecting card and master system
Number line；The power supply includes master system, signal generator, power amplifier, high-frequency vibration equipment, charge amplification
Device, oscillograph, dynamic strain indicator and data collecting card power supply.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285939A (en) * | 2019-04-03 | 2019-09-27 | 武汉理工大学 | Railway steel bridge node weld seam random crack propagation based on vibration control inhibits system |
| CN111638669A (en) * | 2020-05-25 | 2020-09-08 | 上海海事大学 | Signal acquisition system and acquisition method for abnormal monitoring signals |
-
2019
- 2019-01-18 CN CN201910047316.9A patent/CN109487073A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285939A (en) * | 2019-04-03 | 2019-09-27 | 武汉理工大学 | Railway steel bridge node weld seam random crack propagation based on vibration control inhibits system |
| CN110285939B (en) * | 2019-04-03 | 2020-11-24 | 武汉理工大学 | Railway steel bridge node welding line random crack propagation inhibition system based on vibration control |
| CN111638669A (en) * | 2020-05-25 | 2020-09-08 | 上海海事大学 | Signal acquisition system and acquisition method for abnormal monitoring signals |
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