CN109443961A - It is a kind of for detecting the device and detection method of rod piece end intensity - Google Patents
It is a kind of for detecting the device and detection method of rod piece end intensity Download PDFInfo
- Publication number
- CN109443961A CN109443961A CN201811392112.0A CN201811392112A CN109443961A CN 109443961 A CN109443961 A CN 109443961A CN 201811392112 A CN201811392112 A CN 201811392112A CN 109443961 A CN109443961 A CN 109443961A
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- rod piece
- exciting
- rod
- detecting
- endless cable
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/38—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by electromagnetic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of for detecting the device and detection method of rod piece end intensity, including the vertical exciting device being set on rod piece, the vertical exciting device is fixedly connected on the endless cable on rod piece, fixes the bayonet unit of the endless cable and the acceleration transducer on rod piece；Vertical exciting device is fixedly connected on rod piece by endless cable and bayonet unit when detection, starts driving motor, transmission gear drives sliding shoe back and forth to be shaken, and then applies vertical exciting force, and carry out record detection by acceleration transducer.The apparatus structure is simple, can accurately be detected under conditions of lossless rod piece to the intensity of rod piece end, and detection method is simple, strong operability.
Description
Technical field
The invention belongs to detection device field more particularly to a kind of devices and detection side for detecting rod piece end intensity
Method.
Background technique
Non-destructive testing technology, that is, non-damaged data is not exactly destroying the original state of test substance, chemical property etc.
Under the premise of, to obtain reviewing party used by physics, the chemical corps intelligences such as content related with the quality of determinand, property or ingredient
Method.
In member structure, common non-destructive testing technology has the methods of X-ray, CT scan technology, contrasting power.Wherein,
Contrasting power defect apparent for node has preferable detection effect, but the defect of inside configuration can not be examined
It surveys；X-ray, CT scan technology can whether there is defect inside preferable detection structure, for example welding quality is bad, and there are gas
Bubble etc., the size of test device is larger, and exists to the health of tester and threaten, therefore be difficult in engineer application
To universal, and it can only detect the defect of aspect of material, not be capable of measuring the presence of residual stress, therefore its detection effect
Fruit also suffers from certain drawbacks.
Therefore, a kind of intensity inspection in rod piece end lossless, testing cost is low, easy to operate and detection effect is good is now needed
Survey device and its corresponding detection method.
Summary of the invention
Goal of the invention: the first object of the present invention is to provide one kind can accurately detect rod piece end under the conditions of lossless
The device of intensity；
The second object of the present invention is to provide a kind of method detected using the device.
Technical solution: the present invention is used to detect the device of rod piece end intensity, including the vertical exciting dress being set on rod piece
It sets, which is fixedly connected on the endless cable on rod piece, fix the bayonet unit of the endless cable and be set on rod piece
Acceleration transducer；The vertical exciting device includes support frame, is fixed on support frame, is parallel to the driving of rod piece setting
Motor, the exciting rod being vertically connected with driving motor, the exciting rod are equipped with the sliding shoe slided up and down along it, on sliding shoe
Equipped with cavity, the transmission gear being connected with driving motor is equipped in cavity, the two sides inner wall of cavity is equipped with and transmission gear
The rack gear of engagement.
Furtherly, the vertical exciting device of the present invention further includes being set on support frame, falling within its center of gravity on exciting rod
Balance weight.The contact jaw of sliding shoe and exciting rod is equipped with ball, and exciting rod is equipped with guide rail corresponding with the ball.Transmission
Gear is the semicircle gear with curved teeth being toothed around on a semi arch, which makes sliding shoe move back and forth.
It further says, bayonet unit includes that two sides are respectively equipped with endless cable import, the limit frame of inner hollow, set on limit
Position frame in rotating bar and by endless cable be fixed simultaneously by rotating bar eject bayonet unit limit bull stick.Limit the upper of frame
The circular hole through end face is respectively equipped on end face and lower end surface, wherein the circular-hole internal-wall of upper surface is circumferentially with tooth socket.Endless cable
Side is set to the gear teeth, and rotating bar is equipped with the rotating bar tooth socket with gear teeth meshing, and top is greater than on limit frame equipped with diameter breaks
The bolt head of face tooth socket.Limit bull stick is equipped with the limit bull stick gear teeth to fasten with the tooth socket on limit frame, and top is equipped with diameter
Greater than the cylindrical piece of the tooth socket on limit frame.
Furtherly, which further includes the center control system being connected with vertical exciting device and acceleration transducer
System.
The method that the present invention uses above-mentioned apparatus to be detected, includes the following steps:
(1) it installs: vertical exciting device being fixedly connected on rod piece by endless cable and bayonet unit；
(2) exciting: starting driving motor so that transmission gear drives sliding shoe back and forth to be shaken, and then applies vertical
Exciting force, and the vibration frequency of vertical exciting device is gradually increased, until rod piece generates covibration；
(3) acceleration signature of rod piece and calculating in vibration processes data collection process: are recorded by acceleration transducer
Obtain node strength.
The utility model has the advantages that compared with prior art, remarkable advantage of the invention are as follows: the apparatus structure is simple, can be in nothing
The intensity of rod piece end is accurately detected under conditions of damage rod piece, and detection method is simple, it can strong operability.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of detection device of the present invention；
Fig. 2 is the structural schematic diagram of the vertical exciting device of the present invention；
Fig. 3 is the structural schematic diagram of exciting rod of the present invention；
Fig. 4 is the structural schematic diagram of bayonet unit of the present invention；
Fig. 5 is the top view of bayonet unit of the present invention；
Fig. 6 is the bottom view of bayonet unit of the present invention；
Fig. 7 is the structural schematic diagram of rotating bar of the present invention；
Fig. 8 is the structural schematic diagram of present invention limit bull stick；
Fig. 9 is the working state figure of apparatus of the present invention；
Figure 10 is that rod piece vibrates micro unit analysis schematic diagram.
Specific embodiment
Further details of the technical solution of the present invention with reference to the accompanying drawing.
The present invention is used to detect the device of rod piece end intensity, including be set to it is on rod piece 1, rod piece 1 is applied and vertical is swashed
Vertical exciting device 2 is fixedly connected on the endless cable on rod piece 1 by the vertical exciting device 2 for power of shaking, and by the card of endless cable clamping
Buckle device 3.Vertical exciting device 2 is set to the middle position of rod piece 1, and two sides are symmetrically arranged with equipped with several acceleration on rod piece 1
Sensor 4 is spent, the vertical exciting force on rod piece 1 is recorded.The device may also include with acceleration transducer 4 and it is vertical swash
It is that vibrating device 2 is connected, with signal sending function, receive capabilities, processing function, the central control system of human-computer interaction function
22, as shown in Figure 1.
Wherein, vertical exciting device 2 includes support frame 5, is fixed on support frame 5 and is parallel to the setting of 1 direction of rod piece
Driving motor 6, the exciting rod 7 being vertically connected with 6 other side of driving motor, and on support frame 5, to fall within its center of gravity sharp
The balance weight 11 to shake on bar 7, as shown in Figure 2.One side end face of exciting rod 7 is equipped with sliding shoe 8, the sliding shoe 8 and exciting rod 7
The end being in contact is equipped with ball 12, and exciting rod 7 is equipped with the guide rail for accommodating the ball 12, by the setting of ball 12 and guide rail,
So that sliding shoe 8 reciprocatingly slides on exciting rod 7, the both ends of exciting rod 7, which are equipped with, prevents sliding shoe 8 from falling off
Gag lever post 23, or the shift position for limiting sliding shoe 8 can be set by the length of guide rail.Sliding shoe 8 is equipped with cavity, cavity
It is interior equipped with the transmission gear 9 being connected with driving motor 6, the two sides inner wall of cavity is equipped with the rack gear engaged with transmission gear 9
10, and the transmission gear 9 is semicircle gear with curved teeth, i.e., the semicircle gear with curved teeth being only toothed around on a semi arch, the other half circle
The gear teeth are not provided on arc, as shown in Figure 3.By the setting of the semicircle gear with curved teeth, and then enable to sliding shoe 8 in exciting rod 7
Upper reciprocating motion, by starting driving motor 6, band nutating gear 9 is rotated, so that sliding shoe 8 carries out on exciting rod 7
It moves back and forth, exciting force in contrast is applied to rod piece 1, makes its vibration.
The limit frame 14 of bayonet unit 3 including hollow structure, the two sides of limit frame 14 are respectively equipped with endless cable import 13,
The circular hole 17 for being respectively equipped on top and bottom and running through end face, is wherein circumferentially with tooth socket on 17 inner sidewall of circular hole of upper end,
As shown in Figs. 4-6；Rotating bar 15 is set in limit frame 14 and through the top and bottom circular hole 17 of limit frame 14, rotation
Bar 15 is equipped with rotating bar tooth socket 18 (bottom end is not provided with tooth socket 18), and the bottom end of rotating bar 15 is cylinder, and top is equipped with diameter
Greater than the bolt head 19 of limit 14 upper surface tooth socket of frame, as shown in Figure 7.And being equipped with for endless cable is nibbled with 18 phase of rotating bar tooth socket
The gear teeth of conjunction.Vertical exciting device 2 is fixed on rod piece 1 using endless cable when use, and the both ends of endless cable are respectively from limitting casing
The both ends import 13 of frame 14 passes through, and is pierced by positioned at the two sides of rotating bar 15, and from opposite other end import 13, by endless cable
The gear teeth of setting are meshed with rotating bar tooth socket 18, to tighten to rotation to endless cable.Bayonet unit 3 further includes by endless cable
It is fixed while ejecting rotating bar 15 the limit bull stick 16 of bayonet unit 3, limit bull stick 16 is equipped with and limits on frame 14
The limit bull stick gear teeth 20 that tooth socket fastens, the bottom end of limit bull stick 16 are cylinder, and top is equipped with diameter and is greater than on limit frame 14
The cylindrical piece 21 of end tooth slot, as shown in Figure 8.In use, swingle 15 is first set to limit by the lower end of limit frame 14 upwards
In frame 14, i.e., the cylindrical end of swingle 15 is in contact with the circular hole 17 that the upper surface of limit frame 14 is equipped with tooth socket, leads to
Cross the gear teeth being arranged on endless cable be meshed with rotating bar tooth socket 18 to endless cable tightening after, will limit bull stick 16 from limit frame 14 it is upper
End penetrates, and simultaneously ejects swingle 15, finally limits limit bull stick gear 20 and limit 14 upper end of frame of 16 upper surface of bull stick
The tooth socket in face fastens, so that endless cable be fixed, while limit bull stick 16 is arranged to magnetism, further prevents limit bull stick 16
Cause to fall off due to structural vibration.
The method that the present invention uses above-mentioned apparatus to be detected, includes the following steps:
(1) it installs: vertical exciting device 2 being fixedly connected on rod piece 21 by endless cable and bayonet unit 3；
(2) exciting: starting driving motor 6, transmission gear 9 drive sliding shoe 8 back and forth to be shaken, and then apply vertical sharp
Vibration power, as shown in Figure 9；
(3) it resonates: gradually increasing the vibration frequency of exciting device, until covibration occurs in rod piece；
(4) data collection, processing: the acceleration for recording the rod piece 1 of device in vibration processes by acceleration transducer 4 is special
Sign, and feed back to central control system 22；
(5) according to acceleration signature is obtained, the intensity of egress data processing: is calculated in conjunction with calculation formula.
Wherein, it includes following content that the data obtained in step (5) to acceleration transducer 4, which carry out processing:
Rod piece is assumed to be elastic cantilever, along beam deformation plane be arranged coordinate system, it is assumed that beam during deformation,
The displacement of axis direction establishes displacement components u (x, t) equation about time and position each along z-axis:
In formula: Q is shearing；ρ is density of material；A is area of section；F is external force load.
In Combining material mechanicsObtain cantilever Beam Vibration equation:
To u (x, t) variables separation u (x, t)=φ (x) Y (t), obtain:
Y (t)=B1sin(ωt)+B2cos(ωt)
φ (x)=A1cosβx+A2sinβx+A3chβx+A4shβx
In formula: Q is shearing；M is moment of flexure；EI is bending stiffness, and ω is vibration circular frequency；Y (x, t) be about displacement and when
Between two variables equation；Y (t) is the equation about time t；Ф (x) is the equation about displacement x； For bar
The uniformly distributed quality of part alongst；B1、B2For constant.
It can be solved by primary condition, A1、A2、A3、A4It, can be according to Boundary Condition for Solving for constant；Parameter beta meets
For fixing end boundary condition:
It can obtainIn formula, φ ' (x) is the first derivative of the equation about displacement x.
At the top of the soil body, since driving plate has certain quality, and the plane motion of fluctuating acceleration is done, such as Figure 10 institute
Show.Therefore, the relative motion of node is split up into translational motion and fixed-axis rotation, beam is pushing up respectively in the effect of node inertia force
Portion generates shearing boundary condition and moment of flexure boundary condition:
In formula: V (L) is the shearing of Rod end；M (L) is the moment of flexure of Rod end；m1For the calculating matter of Rod end
Amount；J1It is used for the rotation of node；φ ' (L) is the first derivative of Rod end displacement equation.
In view of the solution that has of equation, the rotary shaft of false top node rotary inertia is located in cantilever top surface of the beam, by φ (L)/
φ ' (L)=0, which is brought into absorbing boundary equation, to be solved, and arrangement can obtain:
To make wave equation have solution, then A1、A2It should be untrivialo solution, then determinant is equal to zero, it may be assumed that
Formula is arranged, the beam frequency equation that driving plate is arranged at earth pillar top can be obtained:
αjαmz4(1-coszchz)-αjz3(sinzchz+coszshz)+αmz(sinzchz-coszshz)-(1+
Coszchz)=0 wherein:
In formula: αJFor joint rotation inertia and rotary inertia of the cantilever beam as lumped mass when the radius of inertia is L
Ratio, is rotary inertia ratio, and value can be used as node and member bending intensity judgment criteria；αmTo drive node quality and cantilever beam
The ratio of quality, is mass ratio, and value can be used as node and rod piece shear strength judgment criteria.Furthermore in conjunction with mode curve,
The contact strength that corresponding rod piece endpoint goes out can be calculated.
Claims (10)
1. a kind of for detecting the device of rod piece end intensity, it is characterised in that: including the vertical exciting dress being set on rod piece (1)
Set (2), which be fixedly connected on the endless cable on rod piece (1), fix the bayonet unit (3) of the endless cable with
And it is set to the acceleration transducer (4) on rod piece (1)；The vertical exciting device (2) includes support frame (5), is fixed on support
On frame (5), it is parallel to the driving motor (6) that rod piece (1) is arranged, the exciting rod (7) being vertically connected with driving motor (6) is described
Exciting rod (7) is equipped with the sliding shoe (8) slided up and down along it, and sliding shoe (8) is equipped with cavity, is equipped in cavity and driving electricity
The transmission gear (9) that machine (6) is connected, the two sides inner wall of cavity are equipped with the rack gear (10) engaged with the transmission gear (9).
2. according to claim 1 for detecting the device of rod piece end intensity, it is characterised in that: the vertical exciting dress
Setting (2) further includes being set on support frame (5), its center of gravity being made to fall within the balance weight (11) on exciting rod (7).
3. according to claim 1 for detecting the device of rod piece end intensity, it is characterised in that: the sliding shoe (8)
Ball (12) are equipped with the contact jaw of exciting rod (7), exciting rod (7) is equipped with guide rail corresponding with ball (12).
4. according to claim 1 for detecting the device of rod piece end intensity, it is characterised in that: the transmission gear
It (9) is the semicircle gear with curved teeth being toothed around on a semi arch, which makes sliding shoe (8) move back and forth.
5. according to claim 1 for detecting the device of rod piece end intensity, it is characterised in that: the bayonet unit
It (3) include that two sides are respectively equipped with endless cable import (13), the limit frame (14) of inner hollow, turn in limit frame (14)
Lever (15) and the limit bull stick (16) that endless cable is fixed while ejecting rotating bar (15) bayonet unit (3).
6. according to claim 5 for detecting the device of rod piece end intensity, it is characterised in that: the limit frame
(14) circular hole (17) through end face is respectively equipped on upper surface and lower end surface, wherein circular hole (17) inner wall week of upper surface
To equipped with tooth socket.
7. according to claim 6 for detecting the device of rod piece end intensity, it is characterised in that: the side of endless cable is set to
The gear teeth, the rotating bar (15) are equipped with the rotating bar tooth socket (18) with gear teeth meshing, and top is equipped with diameter and is greater than limit frame
(14) bolt head (19) of upper surface tooth socket.
8. according to claim 5 for detecting the device of rod piece end intensity, it is characterised in that: the limit bull stick (16)
The limit bull stick gear teeth (20) to fasten with the tooth socket in limit frame (14) are equipped with, top is equipped with diameter and is greater than limit frame
(14) cylindrical piece (21) of upper surface tooth socket.
9. according to claim 1 for detecting the device of rod piece end intensity, it is characterised in that: the device further include with
The central control system (22) that vertical exciting device (2) is connected with acceleration transducer (4).
10. the method detected using device described in claim 1, it is characterised in that include the following steps:
(1) it installs: vertical exciting device (2) being fixedly connected on rod piece (1) by endless cable and bayonet unit (3)；
(2) exciting: starting driving motor (6) so that transmission gear (9) drives sliding shoe (8) back and forth to be shaken, and then applies
Vertical exciting force, and the vibration frequency of vertical exciting device (2) is gradually increased, until rod piece (1) generates covibration；
(3) acceleration signature and meter of rod piece (1) in vibration processes data collection process: are recorded by acceleration transducer (4)
It calculates and obtains node strength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811392112.0A CN109443961A (en) | 2018-11-21 | 2018-11-21 | It is a kind of for detecting the device and detection method of rod piece end intensity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811392112.0A CN109443961A (en) | 2018-11-21 | 2018-11-21 | It is a kind of for detecting the device and detection method of rod piece end intensity |
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|---|---|
| CN109443961A true CN109443961A (en) | 2019-03-08 |
Family
ID=65554043
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811392112.0A Pending CN109443961A (en) | 2018-11-21 | 2018-11-21 | It is a kind of for detecting the device and detection method of rod piece end intensity |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114001854A (en) * | 2021-11-01 | 2022-02-01 | 湖南凌翔磁浮科技有限责任公司 | Testing device for measuring end force of external rotating rod piece |
| CN115015110A (en) * | 2022-06-23 | 2022-09-06 | 中交二航武汉港湾新材料有限公司 | Foam light soil layering detection device and detection method |
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| CN114001854A (en) * | 2021-11-01 | 2022-02-01 | 湖南凌翔磁浮科技有限责任公司 | Testing device for measuring end force of external rotating rod piece |
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| CN115015110A (en) * | 2022-06-23 | 2022-09-06 | 中交二航武汉港湾新材料有限公司 | Foam light soil layering detection device and detection method |
| CN115015110B (en) * | 2022-06-23 | 2023-07-21 | 中交二航武汉港湾新材料有限公司 | Foam light soil layering detection device and detection method |
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Application publication date: 20190308 |