CN116628867A - Design method of artificial periodic structure impact isolation device for gear transmission device - Google Patents
Design method of artificial periodic structure impact isolation device for gear transmission device Download PDFInfo
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- CN116628867A CN116628867A CN202211414787.7A CN202211414787A CN116628867A CN 116628867 A CN116628867 A CN 116628867A CN 202211414787 A CN202211414787 A CN 202211414787A CN 116628867 A CN116628867 A CN 116628867A
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- 238000002955 isolation Methods 0.000 title claims abstract description 83
- 230000000737 periodic effect Effects 0.000 title claims abstract description 41
- 230000005540 biological transmission Effects 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 48
- 229920002635 polyurethane Polymers 0.000 claims abstract description 19
- 239000004814 polyurethane Substances 0.000 claims abstract description 19
- 229920003023 plastic Polymers 0.000 claims abstract description 17
- 239000004033 plastic Substances 0.000 claims abstract description 17
- 238000004364 calculation method Methods 0.000 claims abstract description 13
- 230000035939 shock Effects 0.000 claims description 18
- 239000011148 porous material Substances 0.000 claims description 15
- 238000013016 damping Methods 0.000 claims description 8
- 238000004088 simulation Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 239000002905 metal composite material Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 4
- 239000011159 matrix material Substances 0.000 description 6
- 125000006850 spacer group Chemical group 0.000 description 5
- 230000001133 acceleration Effects 0.000 description 4
- 230000005284 excitation Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2113/00—Details relating to the application field
- G06F2113/26—Composites
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Theoretical Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Evolutionary Computation (AREA)
- Computer Hardware Design (AREA)
- General Engineering & Computer Science (AREA)
- Pure & Applied Mathematics (AREA)
- Mathematical Optimization (AREA)
- Mathematical Analysis (AREA)
- Computational Mathematics (AREA)
- Vibration Dampers (AREA)
Abstract
The invention aims to provide a design method of an artificial periodic structure isolation device for a gear transmission device, which comprises the steps of isolation structure size parameter design, artificial periodic structure topology configuration design, polyurethane material performance parameter design, reinforced pipe material selection, isolation device natural frequency calculation, gear transmission device combined isolation device assembly modeling, isolation efficiency calculation and plastic damage calculation. The invention can be used for processing the artificial periodic structure impact isolation device, realizes the impact isolation effect on the basis of ensuring the strength of the impact isolation device, and has certain application value.
Description
Technical Field
The invention relates to a design method of a gear transmission device, in particular to a design method of a shock-proof device.
Background
The gear transmission device is used as an important component sleeve of the ship unit, and development of the design of the isolation device aiming at the gear transmission device has important significance for improving the vitality of the ship. Polyurethane is a high molecular super elastic material, is commonly used as vibration isolation and vibration reduction material in engineering, and has stronger bearing capacity than the traditional rubber vibration isolation piece; the design of the porous artificial periodic structure is adopted in the super-elastic polyurethane material, the tubular material is inserted into the hole for reinforcement, and the design scheme of the isolating device suitable for the gear transmission device is obtained through a reasonable design flow, so that the isolating device has certain application value.
Disclosure of Invention
The invention aims to provide a design method of an artificial periodic structure shock-absorbing device for a gear transmission device, which can finish machining and application of the shock-absorbing device.
The purpose of the invention is realized in the following way:
the invention relates to a design method of an artificial periodic structure shock-proof device for a gear transmission device, which is characterized by comprising the following steps of: the method comprises the steps of designing a size parameter of a shock isolation structure, designing a topological configuration of an artificial periodic structure, designing a performance parameter of a polyurethane material, selecting a reinforced pipe material, calculating the natural frequency of the shock isolation device, assembling and modeling a gear transmission device by combining the shock isolation device, calculating the shock isolation efficiency and calculating the plastic damage.
The invention may further include:
1. and the size parameter design of the isolation structure determines the horizontal section size of the isolation structure according to the installation surface of the gear transmission device, and the height of the isolation device is selected by comprehensively considering the structural deformation and the isolation efficiency.
2. The design of the topological configuration of the artificial periodic structure is specifically to determine the number of layers of the pores, the porosity of each layer, the pore size and the geometric configuration of the pores of the artificial periodic structure, wherein the geometric configuration comprises triangles, rectangles and circles.
3. The polyurethane material performance parameter design is to select the hardness of the material to calculate the superelastic material constant, and calculate the Rayleigh damping coefficient according to the upper and lower frequency limits.
4. The reinforced pipe material is made of metal materials and composite materials.
5. And (3) judging whether the natural frequency of the isolation device is higher than the minimum system isolation natural frequency obtained by calculating the impulse pulse width through calculation, if not, returning to the step of adjusting the design of the topological configuration of the artificial periodic structure until the judgment result is yes, and selecting as an isolation design scheme.
6. And (3) combining the gear transmission device to perform assembly modeling simulation, calculating the impact isolation efficiency, judging whether the impact isolation efficiency meets the design requirement, if not, returning to a step of adjusting the structural dimension parameter design of the impact isolation structure to adjust the structural height and the topological configuration design of the manual periodic structure to adjust the number of pore layers, the porosity, the pore size and the geometric configuration, and performing plastic damage calculation until the judgment result is yes.
7. And the plastic damage calculation is to examine whether plastic damage occurs to the reinforced pipe, if the judgment result is negative, the reinforced pipe material is returned and adjusted to improve the strength of the reinforced pipe to avoid the plastic damage until the judgment result is positive, and then all the design flows are completed.
The invention has the advantages that: the invention can be used for processing the artificial periodic structure impact isolation device, realizes the impact isolation effect on the basis of ensuring the strength of the impact isolation device, and has certain application value.
Drawings
FIG. 1 is a flow chart of the present invention;
FIG. 2 shows a gear assembly of the type used in the present invention, the gear assembly having a mass of 192.8kg and a bottom face length and width dimension of 470mm by 250mm;
FIG. 3 is a schematic diagram of a spacer topology of a manual periodic structure according to the present invention;
FIG. 4 is a triangular configuration and dimension of the reinforcing tube according to the present invention;
FIG. 5 shows the hardness and material constant C of the material of the present invention 01 /C 10 A relation curve, a material constant C which can be checked based on the curve by selecting the hardness of the material 01 /C 10 Is a numerical value of (2);
FIG. 6 is a simulation model of the present invention modeling the assembly of a spacer with a gear assembly, wherein the gear assembly is simplified;
FIG. 7 is a graph of the shock load excitation for use in the calculation of the present invention, the maximum acceleration of the shock load excitation being A n 380m/s 2 ；
Fig. 8 shows a finished product of the spacer manufactured by the design scheme of the spacer with the artificial periodic structure for the gear transmission device according to the design flow.
Detailed Description
The invention is described in more detail below, by way of example, with reference to the accompanying drawings:
with reference to fig. 1-8, the design flow of the artificial periodic structure isolation device for the gear transmission device can be completed according to the design flow, and the structural size parameter, the topological configuration and the polyurethane material performance parameter of the artificial periodic structure isolation device can be obtained after the design is completed according to the flow, so that the processing and the application of the isolation device can be completed according to the parameters.
The design flow firstly needs to complete the design scheme of the primary artificial periodic structure isolation device, and mainly comprises four aspects of the design of the dimension parameter of the isolation structure, the design of the topological configuration of the artificial periodic structure, the design of the performance parameter of the polyurethane material and the selection of the reinforced pipe material.
In the design of the size parameter of the isolation structure, the horizontal section size of the isolation structure is required to be determined according to the installation surface of the gear transmission device, then the height of the isolation structure is required to be selected, the selection of the height influences the structural deformation and the isolation efficiency, the two are mutually restricted, the higher the height is, the better the isolation efficiency is, but the greater the structural deformation is; excessive structural deformation can cause the system to fail to operate stably, so that the height of the selected impact structure needs to be comprehensively considered.
The design of the topological configuration of the artificial periodic structure comprises the number of layers of pores, the porosity of each layer, the pore size and the geometric configuration of the pores, wherein the geometric configuration is mainly selected from but not limited to triangle, rectangle and circle; considering that the impact transmission is from bottom to top, the structural rigidity is gradually reduced from bottom to top; the structural rigidity can be gradually reduced from bottom to top by adjusting the porosity.
The polyurethane material performance parameter design needs to select the hardness of the material to calculate the superelastic material constant, and the Rayleigh damping coefficient is calculated through the upper and lower limits of the concerned frequency; the polyurethane material performance parameter is calculated by superelastic material constant C in software simulation 10 、C 01 And Rayleigh dampingCoefficients are expressed.
The reinforced pipe material mainly comprises a metal material and a composite material, the structural strength is influenced by the choice of the reinforced pipe material, if the strength is insufficient, the risk of plastic damage exists in the later calculation, and other reinforced pipe materials can be chosen again in the step.
After the design scheme of the primary artificial periodic structure isolation device is completed, the design natural frequency of the isolation device can be calculated, meanwhile, the minimum system isolation natural frequency can be calculated according to the impact pulse width, whether the design natural frequency of the isolation device is higher than the minimum system isolation natural frequency is judged, if the judgment result is negative, the design of the artificial periodic structure topology configuration and the polyurethane material performance parameter are required to be adjusted in a returning mode until the judgment result is positive, and the design scheme can be selected as the isolation design scheme.
And (3) carrying out assembly modeling simulation by combining the gear transmission device of the application object of the isolation device with an isolation design scheme, calculating the isolation efficiency of an isolation design structure, judging whether the isolation efficiency meets the design requirement, if the judgment result is 'no', returning to adjust the dimension parameter design of the isolation structure to adjust the structure height and the topological configuration design of the manual periodic structure to adjust the pore layer number, the porosity, the pore size and the geometric configuration until the judgment result is 'yes', and carrying out the next calculation.
Finally, whether plastic damage occurs to the reinforced pipe is inspected, if the judgment result is no, the reinforced pipe material is required to be returned and adjusted to improve the strength of the reinforced pipe so as to avoid plastic damage until the judgment result is yes, all the design flow is completed, the design scheme of the artificial periodic structure shock insulation device for the gear transmission device is obtained, and the flow is ended.
Examples:
determining the size parameter design of the isolation structure: according to the size of the mounting surface of the gear transmission device for engineering application, as shown in fig. 2, determining that the length and width dimensions of the isolation device are the same as the bottom surface of the gear transmission device, and are 470mm multiplied by 250mm; the height of the isolation device is not too high, and is selected to be 100mm.
Determining the topological configuration design of the artificial periodic structure: according to the height, the number of the gap layers of the artificial periodic structure is determined to be 4, and the porosity is gradually increased from top to bottom as shown in fig. 3; the geometry was selected to be triangular with a diameter of 16mm circumscribing the triangular aperture size and a wall thickness of 1mm, as shown in fig. 4.
And (3) determining the design of polyurethane material performance parameters: the hardness of the polyurethane material is selected to be 45A, the Young modulus E of the material is 1.8Mpa and the shear modulus G is 0.54Mpa according to the hardness of the material, and C can be found according to the curve relationship between the hardness of the material and the constant of the material as shown in figure 5 01 /C 10 =0.08; for a freely deformable rubber element, the shear modulus G (MPa) and the material constant C 01 /C 10 Between which there is the formula g=2 (C 01 +C 10 ) Therefore, C can be obtained separately 01 And C 10 Is a numerical value of (2).
The Rayleigh damping consists of a structural matrix coefficient alpha and a rigidity matrix coefficient beta, wherein a damping ratio xi=gamma/2, gamma is a damping loss factor, gamma=0.5 is generally taken, and meanwhile, the structural matrix coefficient alpha and the rigidity matrix coefficient beta in the damping ratio and the Rayleigh damping have the formula xi=alpha/(2ω) +βω/2, wherein ω can be substituted into the formula by using the upper limit and the lower limit of a concerned frequency range, and then the structural matrix coefficient alpha and the rigidity matrix coefficient beta can be obtained by simultaneously solving the formula. So far, the design of the polyurethane material performance parameters is completed, and the polyurethane material performance parameters can be used for substituting simulation to calculate.
Determining a reinforced pipe material: the design selects the aluminum material to be placed in the gap of the artificial periodic structure to strengthen the vibration isolation system, so that the impact isolation effect can be effectively improved on one hand, and the system can be prevented from being greatly deformed on the other hand.
According to the impact theory, the duration of the impact effect is important when dealing with impact problems, and only when the impact duration is less than 1/6 of the natural period of the isolation system, the impact will be isolated, whereas when the impact pulse duration is large, the impact will be amplified. And calculating the minimum system isolation natural frequency according to the pulse width and the duration of the impact spectrum.
All required design parameters of the isolation device are determined according to the design, and the design natural frequency of the isolation device is calculated to be larger than the minimum system isolation natural frequency, so that the isolation device can be selected as an isolation design scheme.
The assembly of the spacer with the gear assembly is modeled as shown in fig. 6, where the gear assembly model is simplified. The impact load excitation curve is input into the model as shown in fig. 7. The maximum value A of the acceleration response of the gear transmission device under the design scheme is obtained through calculation m 。
Calculated, the maximum value A of the acceleration response of the gear box m 155m/s 2 Maximum value A of impact load excitation acceleration n 380m/s 2 The impact isolation efficiency can be calculated to be 59%, and the impact isolation efficiency indicates that the design has good impact isolation performance and meets the expected impact isolation requirement.
The structure adopted by the main body of the isolation device is made of polyurethane, and the inner artificial period reinforcing pipe is a metal pipe. The polyurethane material has good extensibility, and especially the polyurethane with low hardness is not easy to break, so that whether plastic damage occurs to the metal tube needs to be inspected. And the plastic parameters of the related metal are input into the simulation model, and the stress of the metal reinforced pipe is less than the yield limit through analysis, so that plastic damage can not occur, and the design scheme is feasible and the design is completed.
Claims (8)
1. A design method of an artificial periodic structure shock-proof device for a gear transmission device is characterized by comprising the following steps: the method comprises the steps of designing a size parameter of a shock isolation structure, designing a topological configuration of an artificial periodic structure, designing a performance parameter of a polyurethane material, selecting a reinforced pipe material, calculating the natural frequency of the shock isolation device, assembling and modeling a gear transmission device by combining the shock isolation device, calculating the shock isolation efficiency and calculating the plastic damage.
2. The method for designing an artificial periodic structure shock absorbing device for a gear transmission according to claim 1, wherein: and the size parameter design of the isolation structure determines the horizontal section size of the isolation structure according to the installation surface of the gear transmission device, and the height of the isolation device is selected by comprehensively considering the structural deformation and the isolation efficiency.
3. The method for designing an artificial periodic structure shock absorbing device for a gear transmission according to claim 1, wherein: the design of the topological configuration of the artificial periodic structure is specifically to determine the number of layers of the pores, the porosity of each layer, the pore size and the geometric configuration of the pores of the artificial periodic structure, wherein the geometric configuration comprises triangles, rectangles and circles.
4. The method for designing an artificial periodic structure shock absorbing device for a gear transmission according to claim 1, wherein: the polyurethane material performance parameter design is to select the hardness of the material to calculate the superelastic material constant, and calculate the Rayleigh damping coefficient according to the upper and lower frequency limits.
5. The method for designing an artificial periodic structure shock absorbing device for a gear transmission according to claim 1, wherein: the reinforced pipe material is made of metal materials and composite materials.
6. The method for designing an artificial periodic structure shock absorbing device for a gear transmission according to claim 1, wherein: and (3) judging whether the natural frequency of the isolation device is higher than the minimum system isolation natural frequency obtained by calculating the impulse pulse width through calculation, if not, returning to the step of adjusting the design of the topological configuration of the artificial periodic structure until the judgment result is yes, and selecting as an isolation design scheme.
7. The method for designing an artificial periodic structure shock absorbing device for a gear transmission according to claim 1, wherein: and (3) combining the gear transmission device to perform assembly modeling simulation, calculating the impact isolation efficiency, judging whether the impact isolation efficiency meets the design requirement, if not, returning to a step of adjusting the structural dimension parameter design of the impact isolation structure to adjust the structural height and the topological configuration design of the manual periodic structure to adjust the number of pore layers, the porosity, the pore size and the geometric configuration, and performing plastic damage calculation until the judgment result is yes.
8. The method for designing an artificial periodic structure shock absorbing device for a gear transmission according to claim 1, wherein: and the plastic damage calculation is to examine whether plastic damage occurs to the reinforced pipe, if the judgment result is negative, the reinforced pipe material is returned and adjusted to improve the strength of the reinforced pipe to avoid the plastic damage until the judgment result is positive, and then all the design flows are completed.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117251947A (en) * | 2023-08-07 | 2023-12-19 | 中国船舶重工集团公司第七0三研究所 | Design method and system for artificial periodic structure impact isolation device for gear transmission device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117251947A (en) * | 2023-08-07 | 2023-12-19 | 中国船舶重工集团公司第七0三研究所 | Design method and system for artificial periodic structure impact isolation device for gear transmission device |
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