Workbench simulation analysis-based leaf spring working performance optimization method

Abstract

The invention belongs to the field of mechanical simulation, and relates to a leaf spring working performance optimization method based on Workbench simulation analysis. The problem that the spring piece design does not meet the engineering application requirement is solved. According to the method, a structure simulation model consistent with design and optimization requirements is established, a quasi-dynamic method is adopted for analogue simulation, the working end of the spring piece is moved to the working position, then the position of the spring piece is adjusted to the working state by means of loading force, and finally the strength and elasticity results of the spring piece in the working state are obtained. And if the strength or the elasticity of the leaf spring does not meet the design requirements, changing the design parameters of the leaf spring by using three-dimensional modeling software, and repeating the steps until the strength and the elasticity of the leaf spring meet the design requirements. The method is suitable for engineering design of various spring pieces.

Description

Technical Field

[0001] The invention belongs to the field of mechanical simulation and relates to a method for optimizing the working performance of a spring sheet based on Workbench simulation analysis. Background Art

[0002] For most spring leaf designs, within their effective space, it is necessary to ensure that their elastic force more accurately meets the design requirements to avoid repeated changes in the design due to excessive or insufficient elastic force; at the same time, it is necessary to ensure that the equivalent stress of the spring leaf meets the strength design requirements to avoid severe plastic deformation or even fracture due to excessive stress. In order to overcome the above-mentioned weak problems in the design and use of spring leaves, it is necessary to optimize and improve the working performance of the spring leaves.

[0003] At present, there are relatively few studies on methods specifically for optimizing the strength and elasticity of spring leaves in China. There is a lack of a complete and rigorous optimization and improvement process, modeling and simulation analysis are not systematic, and there is no basis for optimization standards. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a method for optimizing the working performance of a spring sheet based on Workbench simulation analysis, thereby providing a guarantee for the efficient design of the spring sheet.

[0005] The technical solution of the present invention is:

[0006] A method for optimizing the working performance of a spring sheet based on Workbench simulation analysis, comprising:

[0007] A structural simulation model consistent with the design and optimization requirements is established, and a quasi-dynamic method is used for simulation. First, the working end of the spring sheet is moved to the working position, and then the position of the spring sheet is adjusted to the working state with the help of the load force, and finally the strength and elasticity results of the spring sheet in the working state are obtained; if the strength or elastic force of the spring sheet does not meet the design requirements, the 3D modeling software is used to change the design parameters of the spring sheet, and the above steps are repeated until the strength and elastic force of the spring sheet meet the design requirements.

[0008] Specifically:

[0009] 1) Use 3D modeling software to create a spring leaf model and its fixed end fitting model, assemble the two together and place them in an appropriate position;

[0010] 2) Use 3D modeling software to create a matching part model of the working end of the spring piece, and assemble it to the working end of the spring piece created in step 1), and at the same time copy the matching part model and place it at the working position of the spring piece according to the requirements of the drawing;

[0011] 3) In the spring leaf assembly model created in step 2), the displacements dx, dy, and dz of the spring leaf working end fitting moving to the working position are measured and calculated;

[0012] 4) Import the spring leaf assembly model created in step 2) into the Workbench platform, fix and constrain the spring leaf fixed end fitting and the working position fitting, apply displacement loads dx, dy, and dz to the spring leaf working end fitting, and perform preliminary simulation calculations;

[0013] 5) According to the preliminary calculation results of step 4), check whether the matching part model of the working end of the spring piece coincides with the matching part model of the working position;

[0014] 6) If the working end fitting model does not coincide with the working position fitting model, a load force of a certain direction and magnitude is applied to the working end fitting according to the deflection condition, and the simulation calculation is repeated, and the load force is adjusted according to the calculation result until the working end fitting model of the spring sheet coincides with the working position fitting model;

[0015] 7) Extract the equivalent stress of the spring leaf and the support reaction force;

[0016] 8) If the strength or elastic force of the spring sheet does not meet the design requirements, use 3D modeling software to change the design parameters of the spring sheet and repeat steps 1) to 7) until the strength and elastic force of the spring sheet meet the design requirements.

[0017] Furthermore, the step 3) measures and calculates the displacements dx, dy, and dz of the spring sheet working end fitting part when it moves to the working position, and obtains them through the coordinate difference of the feature points of the spring sheet working end fitting part.

[0018] Furthermore, in step 4), the spring sheet working end fitting applies displacement loads dx, dy, and dz, using a quasi-dynamic displacement load application method with equal load sub-steps.

[0019] Furthermore, the step 5) examines whether the matching part model of the working end of the spring piece overlaps with the matching part model of the working position. The overlap standard is based on the overlap degree visible to the naked eye by enlarging the model display in the Workbench interface.

[0020] Furthermore, the step 6) applies a load force of a certain direction and magnitude to the working end fitting, which is achieved by adjusting the action point, magnitude and direction on the working end fitting of the spring sheet.

[0021] Furthermore, in the step 7) of extracting the support reaction force of the spring sheet, it is necessary to extract the support reaction force of the spring sheet in different directions.

[0022] Furthermore, the spring sheet design parameters in step 8) include: spring sheet thickness, width, local curvature, and chamfered corners.

[0023] Furthermore, in step 8), the design parameters of the spring sheet are changed using three-dimensional modeling software, with no more than two parameters being changed each time.

[0024] The beneficial effects of the present application are as follows: by adopting the spring sheet working performance optimization technology of the above-mentioned process, a structural simulation model consistent with the design and optimization requirements is established, and a quasi-dynamic method is used for simulation. First, the working end of the spring sheet is moved to the working position, and then the position of the spring sheet is adjusted to the working state with the help of the load force, and finally the strength and elasticity results of the spring sheet in the working state are obtained, so that the design weaknesses of the spring sheet can be found more intuitively, and gradually optimized and improved.

[0025] This technical solution has been verified by actual engineering applications. It is technically feasible and has reliable results. It can effectively solve the optimization and improvement problems in the design and use of spring leaves. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is the basic flow chart of the present invention.

[0027] Figure 2 It is the spring leaf model of the present invention.

[0028] Figure 3 It is the matching piece model of the present invention.

[0029] Figure 4 It is the defined moving reference point of the present invention.

[0030] Figure 5 It is the constraint and load of the present invention.

[0031] Figure 6 Schematic diagram of the load force of the present invention.

[0032] Figure 7 It is a result schematic diagram of the present invention. DETAILED DESCRIPTION

[0033] The present application is further described in detail below in conjunction with the accompanying drawings of the embodiments.

[0034] The present invention provides a method for optimizing the working performance of a spring sheet based on Workbench software, which uses a numerical simulation method to simulate the strength and elastic force characteristics of the spring sheet, and repeatedly iterates and improves, thereby providing a guarantee for the efficient design of the spring sheet. To solve this technical problem, the technical solution provided by the present invention is:

[0035] 1) Use 3D modeling software to create a spring leaf model and its fixed end fitting model, assemble the two together and place them in an appropriate position;

[0036] 2) Use 3D modeling software to create a matching part model of the working end of the spring piece, and assemble it to the working end of the spring piece created in step 1), and at the same time copy the matching part model and place it at the working position of the spring piece according to the requirements of the drawing;

[0037] 3) In the spring leaf assembly model created in step 2), the displacements dx, dy, and dz of the spring leaf working end fitting moving to the working position are measured and calculated;

[0038] 4) Import the spring leaf assembly model created in step 2) into the Workbench platform, fix and constrain the spring leaf fixed end fitting and the working position fitting, apply displacement loads dx, dy, and dz to the spring leaf working end fitting, and perform preliminary simulation calculations;

[0039] 5) According to the preliminary calculation results of step 4), check whether the matching part model of the working end of the spring piece coincides with the matching part model of the working position;

[0040] 6) If the working end fitting model does not coincide with the working position fitting model, a load force of a certain direction and magnitude is applied to the working end fitting according to the deflection condition, and the simulation calculation is repeated, and the load force is adjusted according to the calculation result until the working end fitting model of the spring sheet coincides with the working position fitting model;

[0041] 7) Extract the equivalent stress of the spring leaf and the support reaction force;

[0042] 8) If the strength or elastic force of the spring sheet does not meet the design requirements, use 3D modeling software to change the thickness, width, local curvature, and chamfer of the spring sheet, and repeat steps 1) to 7) above until the strength and elastic force of the spring sheet meet the design requirements.

[0043] The above steps can achieve optimization and improvement of the spring leaf strength and elastic working performance.

[0044] In the step 1), a three-dimensional geometric model of the spring sheet is created according to the spring sheet design drawing, and its dimensional features, especially the radian and fillet parameters, should be strictly consistent with the drawing.

[0045] In the steps 1) and 2), a three-dimensional model of the fittings of the spring sheet fixed end and the working end is created according to the design drawings of the spring sheet fittings. Small parts such as bolts and screws can be deleted or simplified according to the actual situation, and the larger-scale fitting model can also be cut and processed to retain only part of the structure of the fitting area. The simplification of the fittings must ensure that the stiffness of the simplified fitting model is compared with that before simplification, and the impact on the simulation results of the spring sheet can be ignored.

[0046] In the steps 1) and 2), the matching pieces at both ends of the spring sheet are assembled with the spring sheet according to the assembly drawings and technical requirements of the spring sheet and the matching pieces.

[0047] In the step 2), the matching parts in the working position are accurately placed in strict accordance with the design requirements of the assembly drawing.

[0048] In the step 3), a characteristic point A on the spring sheet working end fitting can be used. 0 Coordinate value (x 0 ,y 0 、z 0 ) and the coordinate value (x, y, z) of the corresponding point A on the working position fitting, calculate the displacement values ​​dx, dy, dz of the fitting at the working end of the spring leaf, the characteristic point can be the sharp point on the fitting, the midpoint of the line, or the center of the circle.

[0049] In step 4), the spring sheet assembly model is imported into Workbench, and the material parameters of each part such as elastic modulus and Poisson's ratio are defined. If the equivalent stress of the spring sheet exceeds the material yield limit, the material yield limit and tangent modulus need to be entered in the material parameters during subsequent optimization and improvement. The tangent modulus is entered as 1 / 10 of the elastic modulus, and the yield limit refers to the relevant material manual.

[0050] In the step 4), the mesh division of the spring sheet is mainly based on hexahedron, and the mesh is refined, and the meshes of other matching parts only need to meet the simulation requirements.

[0051] In step 4), standard friction contact is used for contacts with obvious relative sliding in the assembly model, and binding contact is used for the others.

[0052] In the step 4), the specific constraint object is determined according to the actual support conditions of the spring sheet fixed end fitting and the working position fitting when they are working.

[0053] In the step 4), displacement loads dx, dy, and dz are applied to the spring sheet working end fitting, and the displacement loads are applied using a quasi-dynamic displacement method with equal load sub-steps.

[0054] In the step 5), the model display is enlarged in the Workbench interface to observe the overlap degree of the mating parts with the naked eye.

[0055] In step 6), it is necessary to comprehensively consider the point of action, magnitude and direction of the load force.

[0056] In the step 7), it is necessary to extract the supporting reaction forces of the spring sheet in different directions.

[0057] In the step 8), according to the design requirements of the spring sheet, one or two dimensions of the thickness, width, local curvature, and chamfer of the spring sheet are changed each time the optimization is performed.

[0058] Example

[0059] Workbench software is currently a widely used structural analysis software. Its physical models have been confirmed by engineering and can accurately simulate the stress and deformation problems of structural components.

[0060] The embodiment of the present invention provides a method for optimizing the working performance of a spring based on Workbench software to improve the reliability of a spring leaf product. Figure 1 As shown, the method specifically includes:

[0061] 1) Use 3D modeling software to create a spring leaf model, see Figure 2 , one end of the spring sheet is the fixed end, and the other end is the working end;

[0062] 2) Create the spring sheet fixed end and working end fitting models, assemble them on the spring sheet fixed end and working end respectively, and copy a working end fitting model and place it on the spring sheet working position, see Figure 3 ;

[0063] 3) Extract the feature point A on the spring working end fitting 0 Coordinate value (x 0 ,y 0 、z 0 ) and the coordinates (x, y, z) of the corresponding point A on the working position matching part, see Figure 4 , and calculate the moving distance dx, dy, dz of the point;

[0064] 4) Import the spring sheet assembly model into the Workbench platform, constrain the mating parts at the fixed end of the spring sheet and the mating parts at the working position, and apply displacement loads dx, dy, and dz to the mating parts at the working end of the spring sheet, see Figure 5 , preliminary simulation calculation;

[0065] 5) When the false displacement load cannot ensure that the spring sheet working end fitting model coincides with the working position fitting model, apply load force to the spring sheet working end fitting, adjust the force application point, magnitude and direction until the spring sheet working end fitting model coincides with the working position fitting model completely, see Figure 6 ;

[0066] 6) Extract the equivalent stress of the spring leaf and the support reaction force, see Figure 7 .

[0067] 7) If the equivalent stress and elastic force of the spring leaf cannot meet the design requirements, improve the spring leaf parameters, re-model and simulate until the design requirements are met.

Claims

1. A method for optimizing the working performance of a spring sheet based on Workbench simulation analysis, characterized in that: include: Establish a structural simulation model consistent with the design and optimization requirements, and use the quasi-dynamic method to perform simulation. First, move the working end of the spring sheet to the working position, and then adjust the position of the spring sheet to the working state with the help of the load force, and finally obtain the strength and elasticity results of the spring sheet in the working state; If the strength or elastic force of the spring sheet does not meet the design requirements, use 3D modeling software to change the design parameters of the spring sheet and repeat the above steps until the strength and elastic force of the spring sheet meet the design requirements.

2. A method for optimizing the working performance of a spring sheet based on Workbench simulation analysis as claimed in claim 1, characterized in that: Specifically: 1) Use 3D modeling software to create a spring leaf model and its fixed end fitting model, assemble the two together and place them in an appropriate position; 2) Use 3D modeling software to create a matching part model of the working end of the spring piece, and assemble it to the working end of the spring piece created in step 1), and at the same time copy the matching part model and place it at the working position of the spring piece according to the requirements of the drawing; 3) In the spring leaf assembly model created in step 2), the displacements dx, dy, and dz of the spring leaf working end fitting moving to the working position are measured and calculated; 4) Import the spring leaf assembly model created in step 2) into the Workbench platform, fix and constrain the spring leaf fixed end fitting and the working position fitting, apply displacement loads dx, dy, and dz to the spring leaf working end fitting, and perform preliminary simulation calculations; 5) According to the preliminary calculation results of step 4), check whether the matching part model of the working end of the spring piece coincides with the matching part model of the working position; 6) If the working end fitting model does not coincide with the working position fitting model, a load force of a certain direction and magnitude is applied to the working end fitting according to the deflection condition, and the simulation calculation is repeated, and the load force is adjusted according to the calculation result until the working end fitting model of the spring sheet coincides with the working position fitting model; 7) Extract the equivalent stress of the spring leaf and the support reaction force; 8) If the strength or elastic force of the spring sheet does not meet the design requirements, use 3D modeling software to change the design parameters of the spring sheet and repeat steps 1) to 7) until the strength and elastic force of the spring sheet meet the design requirements.

3. A method for optimizing the working performance of a spring sheet based on Workbench simulation analysis as claimed in claim 1, characterized in that: The step 3) measures and calculates the displacements dx, dy, and dz of the spring sheet working end fitting part when it moves to the working position, and obtains them through the coordinate difference of the feature points of the spring sheet working end fitting part.

4. The method for optimizing the working performance of a spring sheet based on Workbench simulation analysis according to claim 1, characterized in that: In the step 4), the spring sheet working end fitting applies displacement loads dx, dy, and dz, using a quasi-dynamic displacement load application method with equal load sub-steps.

5. The method for optimizing the working performance of a spring sheet based on Workbench simulation analysis according to claim 1, characterized in that: The step 5) examines whether the matching part model at the working end of the spring piece overlaps with the matching part model at the working position. The overlap standard is determined by enlarging the model display in the Workbench interface and taking the overlap degree visible to the naked eye as the basis.

6. The method for optimizing the working performance of a spring sheet based on Workbench simulation analysis according to claim 1, characterized in that: The step 6) applies a load force of a certain direction and magnitude to the working end fitting, which is achieved by adjusting the action point, magnitude and direction on the working end fitting of the spring sheet.

7. The method for optimizing the working performance of a spring sheet based on Workbench simulation analysis according to claim 1, characterized in that: In the step 7) of extracting the support reaction force of the spring sheet, it is necessary to extract the support reaction force of the spring sheet in different directions.

8. The method for optimizing the working performance of a spring sheet based on Workbench simulation analysis according to claim 1, characterized in that: The spring sheet design parameters in step 8) include: spring sheet thickness, width, local curvature, and chamfered corners.

9. A method for optimizing the working performance of a spring sheet based on Workbench simulation analysis as claimed in claim 8, characterized in that: In the step 8), the design parameters of the spring sheet are changed using three-dimensional modeling software, with no more than two parameters being changed each time.

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