A method for predicting compression performance of a disc spring based on ABAQUS and a disc spring device

Abstract

The application discloses a disc spring compression performance prediction method based on ABAQUS and a disc spring device, and relates to the technical field of numerical simulation.The scheme comprises the following steps: obtaining the compression prediction value of the disc spring device based on the ABAQUS method, and analyzing the compression performance of the disc spring device.The scheme can overcome the limitations of existing theories and test methods, and can efficiently and accurately predict the compression performance of the disc spring.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of numerical simulation, in particular to a disc spring compression performance prediction method based on ABAQUS and a disc spring device. BACKGROUND

[0002] As an important elastic element, disc springs are widely used in buffering, shock absorption, energy storage and connecting devices in the fields of machinery, construction, aerospace, etc. due to their advantages such as large stiffness, high bearing capacity, strong energy consumption capacity, and small space occupation. Accurately predicting the performance of disc spring devices under compression conditions (such as bearing capacity, deformation characteristics, plastic region distribution, etc.) is crucial to ensuring the overall safety and reliability of related engineering structures.

[0003] Currently, the evaluation of disc spring compression performance mainly relies on theoretical calculation and physical testing. Theoretical calculation methods are usually based on classical disc spring mechanical models (such as the Almen-Laszlo formula, etc.), which calculate the load-displacement relationship and ultimate bearing capacity through analytical formulas. However, these theoretical models are often based on a series of ideal assumptions (such as complete material elasticity, strict compliance with standard geometric shapes, ignoring boundary effects and friction, etc.), which are difficult to accurately reflect the real stress state of disc springs in actual complex assemblies, especially when disc springs are in non-standard installation conditions or subjected to complex loads such as bidirectional compression. The error of theoretical calculation will significantly increase. On the other hand, although physical testing is intuitive and reliable, it is usually time-consuming, labor-intensive, and costly, and it is difficult to cover all possible working condition combinations, especially in large-scale engineering applications or design optimization stages, the efficiency and flexibility of physical testing are greatly limited. SUMMARY

[0004] The embodiments of the present specification provide a disc spring compression performance prediction method based on ABAQUS to solve the problems of poor accuracy and low efficiency of theoretical calculation and physical testing in the prior art.

[0005] To solve the above technical problems, the embodiments of the present specification are implemented as follows:

[0006] In a first aspect, the embodiments of the present specification provide a disc spring compression performance prediction method based on ABAQUS, applied to a disc spring device, the disc spring device to be measured including a disc spring assembly, a guide rail assembly and a blocking assembly, the disc spring assembly including a plurality of disc springs, comprising:

[0007] Obtaining a disc spring finite element model corresponding to the disc spring device to be measured by sweeping the solid components of the disc spring device to be measured;

[0008] Define the disc spring material constitutive, and introduce the actual material of the disc spring device to be measured into the disc spring finite element model;

[0009] Set the contact conditions between the disc spring assembly, the guide rail assembly and the barrier assembly, and the boundary conditions of the guide rail assembly and the barrier assembly;

[0010] Input the compression working condition of the disc spring device to be measured into the disc spring finite element model, which includes the target displacement or limit deformation value of the disc spring assembly;

[0011] According to the compression prediction value of the disc spring assembly output by the disc spring finite element model, analyze the compression performance of the disc spring.

[0012] In a second aspect, the embodiment of the present specification provides a disc spring device, which comprises a disc spring assembly, a guide rail assembly and a barrier assembly; wherein the disc spring assembly comprises a plurality of disc springs, and the barrier assembly comprises a first limiting piece and a second limiting piece;

[0013] The plurality of disc springs are combined in series, parallel or composite manner; each disc spring passes through the guide rail assembly through a respective central hole, and the first limiting piece and the second limiting piece are arranged at two ends of the disc spring assembly, respectively.

[0014] One embodiment of the present specification can achieve the following beneficial effects: based on the ABAQUS method, the compression prediction value of the disc spring device is obtained, and the compression performance of the disc spring device is analyzed, which can overcome the limitations of existing theoretical and experimental methods, and can efficiently and accurately predict the compression performance of the disc spring. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present specification or the prior art, the drawings needed in the embodiment or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present specification, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0016] Figure 1 A flowchart of a disc spring compression performance prediction method based on ABAQUS provided by an embodiment of the present specification is shown in the figure;

[0017] Figure 2 An application scenario diagram of a disc spring compression performance prediction method based on ABAQUS provided by an embodiment of the present specification is shown in the figure;

[0018] Figure 3 A comparison diagram of the load-displacement curve of the disc spring finite element model provided by the embodiment of the present specification and the load-displacement curve of the theoretical value model under pressure;

[0019] Figure 4 A structural diagram of the disc spring device provided by the embodiment of the present specification;

[0020] Figure 5 A mesh diagram of the disc spring device provided by the embodiment of the present specification;

[0021] Figure 6 A mesh diagram of a single disc spring provided by the embodiment of the present specification;

[0022] Figure 7 A coupling interface diagram of the first limiting piece provided by the embodiment of the present specification;

[0023] Figure 8 A coupling interface diagram of the second limiting piece provided by the embodiment of the present specification;

[0024] Figure 9 A coupling interface diagram of the loading area of the disc spring device provided by the embodiment of the present specification;

[0025] Figure 10 A boundary condition diagram of the disc spring device provided by the embodiment of the present specification;

[0026] Figure 11 An A-A cross-sectional view of the disc spring device provided by the embodiment of the present specification;

[0027] Figure 12 A stress nephogram of the disc spring device provided by the embodiment of the present specification;

[0028] Figure 13 A stress nephogram of the disc spring assembly provided by the embodiment of the present specification;

[0029] Figure 14 A plastic region distribution diagram of a single disc spring provided by the embodiment of the present specification;

[0030] Figure 15 A diagram of the load-displacement curve of the disc spring device under the action of reciprocating load provided by the embodiment of the present specification.

[0031] Explanation of reference signs:

[0032] 1, disc spring device; 2, disc spring assembly; 3, first limiting piece; 4, second limiting piece; 5, guide rail assembly; 6, single disc spring; 7, first fixing piece; 8, gasket; 9, central axis; 10, plastic region; 11, elastic region; 12, first limiting piece coupling surface; 13, second limiting piece coupling surface; 14, guide rail assembly loading point coupling surface; 15, disc spring device grid; 16, single disc spring grid; 17, second fixing piece. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of one or more embodiments of the present specification clearer, the technical scheme of one or more embodiments of the present specification will be described clearly and completely below in combination with specific embodiments of the present specification and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present specification, not all the embodiments. Based on the embodiments in the present specification, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of one or more embodiments of the present specification.

[0034] The technical scheme provided by each embodiment of the present specification will be described in detail below in combination with the drawings.

[0035] The disc spring compression performance prediction method based on ABAQUS provided by the embodiments of the present specification will be described in detail in combination with the drawings.

[0036] Figure 1 The flowchart of the disc spring compression performance prediction method based on ABAQUS provided by the embodiments of the present specification.

[0037] ABAQUS is a powerful finite element software for engineering simulation.

[0038] The finite element model of the disc spring device can be established by using ABAQUS to predict the compression performance with high precision. The disc spring compression performance prediction method based on ABAQUS is applied to the disc spring device, the disc spring device to be measured includes a disc spring assembly, a guide rail assembly and a blocking assembly, the disc spring assembly can include a plurality of disc springs, as shown in Figure 1 The flowchart can include the following steps:

[0039] Step 110: obtaining the disc spring finite element model corresponding to the disc spring device to be measured by sweeping the solid components of the disc spring device to be measured.

[0040] In the embodiments of the present specification, the disc spring finite element model consistent with the geometric characteristics of the solid components of the disc spring device is obtained by sweeping the solid components of the disc spring device. The sweeping method is used for modeling to ensure the accuracy of the model.

[0041] Step 120: Define the constitutive model of the disc spring material by importing the actual material of the disc spring device to be tested into the finite element model of the disc spring.

[0042] In the embodiments described in this specification, the actual material properties of each component in the disc spring device are imported into the disc spring finite element model. The guide rail assembly and the barrier assembly adopt the material properties of Q345 steel.

[0043] Step 130: Set the contact conditions between the disc spring assembly, the guide rail assembly, and the barrier assembly, as well as the boundary conditions between the guide rail assembly and the barrier assembly.

[0044] In the embodiments of this specification, the disc spring assembly may include multiple individual disc springs. Contact conditions are set between the disc spring assembly, the guide rail assembly, and the barrier assembly, including contact between disc springs, between a disc spring and the guide rail assembly, and between a disc spring and the barrier assembly. For example, the coefficient of friction between disc springs may be 0.036, the coefficient of friction between a disc spring and the guide rail assembly may be 0.06, the coefficient of friction between a disc spring and the barrier assembly may be 0.06, and the coefficient of friction between the guide rail assembly and the barrier assembly may be 0.2.

[0045] The boundary conditions of the barrier component are defined to restrict six degrees of freedom, while the guide rail component restricts four degrees of freedom in all directions except the axial direction and rotation around the axial direction, in order to simulate actual constraint conditions.

[0046] In practice, the disc spring assembly, guide rail assembly, and barrier assembly are assembled before setting the contact and boundary conditions.

[0047] Step 140: Input the compression condition of the disc spring device to be tested into the finite element model of the disc spring. The compression condition includes the target displacement or limit deformation value of the disc spring assembly.

[0048] In the embodiments of this specification, the expected compression conditions of the disc spring device in the engineering project are input into the disc spring finite element model. The compression conditions include the target displacement that the disc spring assembly needs to achieve or the maximum limit deformation value that it can withstand. By setting the load conditions in ABAQUS, the actual compression conditions in the engineering project are matched, and the actual force state is simulated by taking the guide rail assembly under tension as positive and compression as negative.

[0049] Step 150: Analyze the compressive performance of the disc spring based on the predicted compressive values ​​of the disc spring assembly output by the finite element model of the disc spring.

[0050] In the embodiments of this specification, calculations are performed based on the finite element model of the disc spring to output the predicted compressive value of the disc spring assembly. The predicted compressive value may include the compressive load and the distribution of the plastic region. Specifically, the reaction force at the loading point is extracted as the load value of the disc spring assembly, a load-displacement curve is fitted, and a stress distribution cloud map is output. The maximum stress value at the point of maximum displacement is extracted, and the proportion of the plastic region is analyzed. Various characteristic values ​​of the disc spring device to be evaluated are analyzed to assess its load-bearing capacity, deformation characteristics, and other performance indicators to verify whether it meets the design requirements of the engineering project.

[0051] In practice, the systematic modeling and simulation process effectively improves the prediction accuracy of the compressive performance of disc spring devices, providing a fast and accurate analysis tool for engineering design.

[0052] It should be understood that the order of some steps in the methods described in one or more embodiments of this specification may be interchanged according to actual needs, or some steps may be omitted or deleted.

[0053] In the embodiments of this specification, the compression prediction value of the disc spring device is obtained based on the ABAQUS method, and the compression performance of the disc spring device is analyzed. This can overcome the limitations of existing theories and experimental methods, and can efficiently and accurately predict the compression performance of the disc spring.

[0054] based on Figure 1 In addition to the method described in the embodiments of this specification, some specific implementation schemes of the method are also provided, which will be described below.

[0055] Optionally, the method described in the embodiments of this specification includes:

[0056] Force analysis is performed on the disc spring assembly, the guide rail assembly, and the barrier assembly to determine the actual force on the disc spring assembly in the disc spring device under test.

[0057] A theoretical compression model of the disc spring device under test is established, and the theoretical compression model includes a method for calculating the compressive bearing capacity of the disc spring.

[0058] The geometric parameters of the disc spring are input into the compression theoretical value model. The geometric parameters include one or more of the following: outer diameter of the disc spring, inner diameter of the disc spring, free height of the disc spring, thickness of the disc spring, Poisson's ratio of the disc spring material, and elastic modulus of the disc spring material.

[0059] The calculated coefficients of the disc spring are input into the compression theoretical value model to obtain the compression theoretical value of the disc spring assembly output by the compression theoretical value model.

[0060] In the embodiments of this specification, a force analysis is performed on the disc spring device under test to clarify the actual force situation of the disc spring assembly in the device. This includes analyzing the force state of the disc spring at various stages of system operation, such as the force characteristics under static load, dynamic load, or reciprocating load, as well as the interaction forces between the disc spring assembly and the guide rail assembly and the barrier assembly. This force analysis provides an accurate analytical foundation for the subsequent establishment of the theoretical compression model and finite element modeling.

[0061] A theoretical compression model is constructed, incorporating the calculation method for the compressive bearing capacity of a disc spring. The geometric parameters of the disc spring are collected and input into the model. These parameters may include the disc spring's outer diameter, inner diameter, free height, thickness, material Poisson's ratio, and material elastic modulus, etc. The geometric parameters are consistent with the physical properties of the actual disc spring to ensure the accuracy of the theoretical calculations.

[0062] To optimize the theoretical value model under pressure, adjusted, adapted, and simplified calculation coefficients can be input into the theoretical value model to improve the accuracy of theoretical calculations.

[0063] After inputting the geometric parameters and calculation coefficients, the theoretical value model under compression is run to calculate and output the theoretical values ​​of the disc spring assembly under the expected compression conditions, including key performance indicators such as compressive bearing capacity and deformation.

[0064] Establishing a theoretical value model of the disc spring device can verify the output results of the finite element model of the disc spring and improve the functional stability of the disc spring device in engineering projects.

[0065] Further, optionally, the method for calculating the compressive bearing capacity of the disc spring described in the embodiments of this specification includes a method for calculating the load value of a single disc spring and a method for calculating the stiffness of a single disc spring; the method for calculating the load value of a single disc spring is as follows: The method for calculating the stiffness of a single disc spring is as follows:

[0066] ,

[0067] in, Where N is the load value for a single disc spring, and N is the stiffness of a single disc spring. and All are calculated coefficients. For elastic modulus, Poisson's ratio, The thickness of a single disc spring. The thickness of a single disc spring after thinning. This represents the deformation of a single disc spring. D The outer diameter of the disc spring. The inner diameter of the disc spring. This is the deformation value calculated when the disc spring is compressed. outer diameter D With inner diameter The ratio of .

[0068] Optionally, the method described in the embodiments of this specification includes:

[0069] Calculate the error between the predicted feature value in the predicted pressure value and the theoretical feature value in the theoretical pressure value, and compare the error with a preset threshold.

[0070] In the embodiments of this specification, both the predicted compressive value and the theoretical compressive value include characteristic values ​​such as yield load, ultimate load, restoring force load, initial stiffness, yield stiffness, and unloading stiffness. The predicted compressive value and the theoretical compressive value are compared for each of these characteristic values, and the error is calculated using the formula ((predicted value - theoretical value) / theoretical value) × 100%. For example, the error between the yield load value in the predicted compressive value and the yield load value in the theoretical compressive value can be calculated.

[0071] The preset threshold can be 15%. Specifically, if the error of all feature values ​​is within 15%, the disc spring device is considered to be suitable for the project; if the error of any feature value is greater than or equal to 15%, the disc spring device design method or the disc spring of this size / type is considered not suitable for the project and can be redesigned and simulated again.

[0072] Figure 2 This diagram illustrates an application scenario of an ABAQUS-based method for predicting the compression performance of a disc spring, as provided in the embodiments of this specification.

[0073] like Figure 2 As shown, the entire process of predicting the compressive performance of a disc spring device is demonstrated. Modeling and analysis are carried out from two perspectives: theoretical model and finite element model. Finally, by comparing the results, the accurate prediction of the compressive performance of the disc spring device is achieved.

[0074] Step 201: Determine the disc spring device;

[0075] Step 202: Determine the force situation of the disc spring, and clarify the force that the disc spring bears at different stages of system operation.

[0076] Step 203: Establish a theoretical model of compression. Based on the force conditions, establish a theoretical model of the disc spring under compression.

[0077] Step 204: Input the geometric parameters of the disc spring and match the finite element model;

[0078] Step 205: Import the calculation coefficient of the disc spring;

[0079] Step 206: Output the theoretical compression value of the disc spring under compression, such as the load-displacement curve, etc.

[0080] Step 207: Use ABAQUS to create a finite element model of the disc spring device;

[0081] Step 208: Define the constitutive model of the disc spring material and the stress-strain relationship of the material during the loading process;

[0082] Step 209: Assemble the disc spring device by assembling the disc spring with the guide rail assembly and the barrier assembly to form a complete device model.

[0083] Step 210: Set interactions and boundary conditions, setting the interactions between components and the boundary conditions of the model;

[0084] Step 211: Input the actual compression condition of the disc spring and fit the characteristics of the disc spring under compression, such as the load-displacement curve;

[0085] Step 212: Axial tension and compression load analysis, extracting the distribution of the plastic region of the compressive load and the disc spring;

[0086] Step 213: Compare the results calculated by the finite element model with the results calculated by the theoretical model, and analyze the differences between the two;

[0087] Step 214: Predict the compressive performance of the disc spring device and evaluate its performance under different working conditions.

[0088] At the practical level, it can efficiently and accurately establish finite element models suitable for the compression analysis of disc spring devices, effectively handle the complex contact, large deformation, and nonlinear (including plastic) material behavior of disc spring components in the device (especially under bidirectional compression), and effectively combine and verify them with classical theoretical models to ensure the accuracy of the output evaluation of the compression performance of disc spring devices.

[0089] Figure 3 This is a schematic diagram comparing the load-displacement curves output by the finite element model and the compression theoretical value model of the disc spring provided in the embodiments of this specification.

[0090] like Figure 3 As shown, the curves of the predicted compression value corresponding to the finite element model of the disc spring and the curves of the theoretical compression value corresponding to the model of the theoretical compression value are displayed. The two curves fit well and reflect the dynamic response of the disc spring device to the load change with displacement during the compression process.

[0091] The embodiments of this specification describe a disc spring device. The disc spring device 1 to be tested may include a disc spring assembly 2, a guide rail assembly 5, and a blocking assembly; wherein, the disc spring assembly 2 includes a plurality of disc springs, and the blocking component includes a first limiting component 3 and a second limiting component 4.

[0092] Multiple disc springs are combined in series, parallel or compound manner; each disc spring passes through the guide rail assembly 5 through its own central hole, and the first limiting member 3 and the second limiting member 4 are respectively disposed at both ends of the disc spring assembly 2.

[0093] Figure 4 This is a schematic diagram of the disc spring device provided in the embodiments of this specification.

[0094] like Figure 4 As shown, the disc spring device 1 to be tested may include a disc spring assembly 2, a guide rail assembly 5, and a blocking assembly. The disc spring assembly 2 is the core force-bearing component, which bears the main elastic deformation and load-bearing capacity. The guide rail assembly 5 provides guidance and support for the disc spring. The blocking assembly is used to limit the deformation range of the disc spring and ensure the stable operation of the device.

[0095] The disc spring assembly 2 consists of multiple individual disc springs 6. These disc springs can be combined in series, parallel, or in combination, depending on actual needs. Series combination increases the total deformation of the device, suitable for applications requiring a larger deformation range; parallel combination improves the load-bearing capacity, suitable for high-load-bearing scenarios; and combination combines the advantages of both series and parallel combinations. Each disc spring is designed with a center hole, through which it can pass sequentially through the guide rail assembly 5, achieving axial movement along the guide rail direction. Each disc spring maintains center alignment.

[0096] Load value of disc spring assembly in series The deformable height of the disc spring assembly Total height of disc spring assembly .

[0097] in, This refers to the number of disc springs; This refers to the height of a single disc spring, i.e., the upper and lower limits of the cross-section of a single disc spring. and For reference only.

[0098] Load value of disc spring assembly in parallel Disc spring assembly deformable height Total height of disc spring assembly .

[0099] The guide rail assembly 5 provides precise guidance for the disc spring, and the matching between the guide rail assembly 5 and the center hole of the disc spring ensures that the disc spring can move smoothly along the guide rail.

[0100] The blocking component may include a first limiting member 3 and a second limiting member 4, which are respectively disposed at both ends of the disc spring assembly 2 to limit the maximum deformation of the disc spring during the force process and prevent the disc spring from failing due to excessive deformation.

[0101] During assembly, each component has a central axis 9. All components can be assembled according to the position of the central axis 9, and the central axis 9 of all components must be aligned.

[0102] After assembly, the first limiting member 3 is coupled to a point on the side near the loading point, the second limiting member 4 is coupled to a point on the side away from the loading point, and the side of the guide rail loading end, which provides convenience for subsequent constraints on the device (constraints can be set only on the point, which is equivalent to setting constraints on the entire surface). The coupling surface 14 of the guide rail assembly loading point is at the loading point location.

[0103] During assembly, multiple disc springs pass sequentially through their respective center holes into the guide rail assembly 5, forming the disc spring assembly 2. The contact between the disc springs includes contact between the supporting surfaces and contact between the inner cone angle surfaces. During assembly, it is ensured that there are no gaps or overlapping portions between adjacent disc springs. Then, the first limiting member 3 and the second limiting member 4 are respectively installed at both ends of the disc spring assembly 2, completing the assembly of the blocking component. Finally, the entire device is debugged and tested to ensure tight fit between components and stable operation.

[0104] In practice, the disc spring device 1 can reciprocate the loading on a single point, and ensure that the disc spring assembly 2 in the disc spring device 1 always remains under compression when the disc spring device 1 is under tension or compression.

[0105] Optionally, in the embodiments of this specification, the inner diameter of the first limiting member 3 is greater than the outer diameter of the second limiting member 4; the diameter of the guide rail assembly 5 is smaller than the inner diameter of any of the disc springs.

[0106] In the embodiments described in this specification, the inner diameter of the first limiting member 3 is larger than the outer diameter of the second limiting member 4, which ensures that the first limiting member 3 and the second limiting member 4 can be correctly positioned at both ends of the disc spring assembly 2 during assembly. The diameter of the guide rail assembly 5 is smaller than the inner diameter of any disc spring, enabling precise guidance and free movement of the disc spring in the guide rail direction.

[0107] Optionally, the disc spring device 1 in the embodiments of this specification may further include a washer 8, the outer diameter of which is larger than the outer diameter of any of the disc springs.

[0108] In the embodiments of this specification, the shim 8 is used to distribute pressure, protect the surface of the disc spring from direct damage, and provide additional support or adjustment space. The outer diameter of the shim 8 is larger than the outer diameter of the disc spring, which can ensure that the shim 8 can completely cover the end face of the disc spring, providing sufficient protection and support.

[0109] In practice, the disc spring device 1 may also include a first fixing member 7 and a second fixing member 17. The first fixing member 7 and the second fixing member 17 can be connected to the guide rail assembly 5 by welding or nut assembly. One side of the first fixing member contacts the washer 8. In the first direction, the distance between the first fixing member and the second fixing member is the same as the height of the pre-compressed disc spring assembly 2 and the washer 8. When reciprocating displacement is applied at the loading point of the guide rail, the force is transmitted to the first fixing member through the guide rail assembly 5, and then to the washer 8 and the disc spring assembly 2 through the first fixing member.

[0110] The side of the first fixing member 7 away from the loading point is flush with the side of the first limiting member 3 away from the loading point; the side of the second fixing member 17 away from the loading point is flush with the side of the second limiting member 4 away from the loading point.

[0111] When pressure is applied, since the fixing member is fixed to the guide rail assembly 5, the fixing member near the loading point of the guide rail assembly 5 and the guide rail assembly 5 are displaced simultaneously, while the fixing member far from the loading point and the pad 8 are separated from each other due to the presence of the limiting member, thereby realizing the compression of the disc spring assembly 2; when tension is applied, the force is transmitted from the guide rail assembly 5 to the pad 8 and the disc spring assembly 2 through the fixing member, and the fixing member near the loading point and the pad 8 are separated due to the presence of the limiting member.

[0112] The direction of tension and compression is set as follows: the direction from the first limiting member 3 to the second limiting member 4 is compression, that is, the first direction is compression; the direction from the second limiting member 4 to the first limiting member 3 is tension, that is, the direction opposite to the first direction is tension.

[0113] The distance between the first limiting member 3 and the second limiting member 4 is fixed. When the disc spring assembly 2 is compressed, it will deform and its height will decrease. The distance between the fixing members is equal to the distance between the first limiting member 3 and the second limiting member 4. After the disc spring assembly 2 is compressed and deformed, the distance between the fixing members will create a height difference with the disc spring assembly 2. Due to the obstruction of the limiting members, the washer 8 will separate from the fixing members.

[0114] Different components work together to ensure that the disc spring assembly 2 remains compressed during the compression process, requiring only a single point of loading.

[0115] Optionally, in the embodiments of this specification, the center point of one side of the guide rail assembly 5 is selected as the loading end and as the load output point.

[0116] In practice, to ensure the accuracy of the deformation representation of the disc spring, the mesh size of the finite element model of the disc spring can be less than 1 / 2 of the thickness of the disc spring.

[0117] Figure 5 A schematic diagram of the grid of the disc spring device provided in the embodiments of this specification; Figure 6 This is a schematic diagram of the grid of a single disc spring provided for an embodiment of this specification.

[0118] like Figure 5 and Figure 6 As shown, the finite element mesh generation of the entire disc spring device is displayed, showing the mesh details of a single disc spring. The mesh density of components such as disc springs, guide rails, and limiting parts needs to be selected according to the force characteristics.

[0119] Figure 7 A schematic diagram of the coupling interface of the first limiting member provided in the embodiments of this specification; Figure 8 This is a schematic diagram of the coupling interface of the second limiting member provided in the embodiments of this specification.

[0120] like Figure 7 and Figure 8 As shown, the coupling method and contact relationship between the first limiting member and the disc spring assembly are illustrated, as are the coupling method and contact relationship between the second limiting member and the disc spring assembly.

[0121] Figure 9 This is a schematic diagram of the coupling interface of the loading area of ​​the disc spring device provided in the embodiments of this specification.

[0122] like Figure 9 The diagram illustrates how external loads are applied to the device and the load transfer path.

[0123] Figure 10 This is a schematic diagram of the boundary conditions for the disc spring device provided in the embodiments of this specification.

[0124] like Figure 10 As shown, fixed constraints are applied to both ends of the guide rail assembly and the outer edge of the limiting member to define the constraint conditions of the disc spring device, ensuring that the analysis is convergent and conforms to the actual working conditions.

[0125] Figure 11 A cross-sectional view AA of the disc spring device provided in the embodiments of this specification.

[0126] like Figure 11 As shown, the internal structure of the device and the relative positions of its components are displayed through a cross-sectional view.

[0127] Figure 12 Stress cloud diagram of the disc spring device provided in the embodiments of this specification;

[0128] likeFigure 12 As shown, the overall stress distribution of the disc spring device under load is illustrated, and high-stress areas can be identified.

[0129] Figure 13 Stress cloud diagram of the disc spring assembly provided in the embodiments of this specification.

[0130] like Figure 13 As shown, the stress distribution of the disc spring assembly under load is displayed. The stress cloud map of the disc spring assembly includes the proportion of the plastic region of the disc spring assembly to the entire disc spring assembly region. Plasticity means reaching the yield stress value in the input material properties of the disc spring.

[0131] The maximum stress was 1500MPa, which did not exceed the input yield stress of 1600MPa. This indicates that no plastic deformation occurred in any area of ​​the disc spring assembly under this method, and all areas were in elastic condition. The maximum stress was at the support end, indicating that the disc spring device met expectations and the finite element model of the disc spring was applicable.

[0132] Figure 14 A diagram showing the distribution of the plastic region of a single disc spring provided in the embodiments of this specification.

[0133] like Figure 14 As shown, the plastic deformation region of a single disc spring under load can be demonstrated, allowing for the assessment of its load-bearing capacity.

[0134] Figure 15 This is a schematic diagram of the load-displacement curve of the disc spring device provided in the embodiments of this specification under reciprocating load.

[0135] like Figure 15 As shown, the X-axis represents displacement, and the Y-axis represents load. This indicates the starting displacement of the disc spring device. The load-displacement curve obtained by the disc spring device under cyclic loading is typically a "double flag" shape, and its characteristic values ​​include: yield load. Ultimate load (Load value at maximum displacement of a typical disc spring assembly), restoring force load Initial stiffness Yield stiffness and unloading stiffness By using finite element analysis to obtain the characteristic load values ​​at the corresponding displacements, the load that the disc spring device can achieve under specific displacements in actual engineering projects, as well as the stress distribution or deformation of the disc spring device, are evaluated to determine whether the disc spring device meets the design requirements of the engineering project.

[0136] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0137] The foregoing has described specific embodiments of this specification; other embodiments are within the scope of the appended claims. In some cases, the actions or steps described in the claims may be performed in a different order than those shown in the embodiments and still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily have to follow the specific or sequential order shown to achieve the desired result. The various embodiments in this specification are described in a progressive manner; similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments.

[0138] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0139] The above description is merely an embodiment of this specification and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims of this application.

Claims

1. A method for predicting the compression performance of a disc spring based on ABAQUS, characterized in that, The application is applied to a disc spring device, which comprises a disc spring assembly, a guide rail assembly and a barrier assembly, the method comprises: Obtaining a disc spring finite element model corresponding to the disc spring device by sweeping the disc spring device entity component; Defining a disc spring material constitutive and introducing the actual material of the disc spring device into the disc spring finite element model; Setting the contact conditions between the disc spring assembly, the guide rail assembly and the barrier assembly and the boundary conditions of the guide rail assembly and the barrier assembly; Inputting the compression working condition of the disc spring device into the disc spring finite element model, the compression working condition comprising a target displacement or a limit deformation value of the disc spring assembly; According to the compression prediction value of the disc spring assembly output by the disc spring finite element model, the compression performance of the disc spring is analyzed.

2. The method of claim 1, wherein, The method comprises: Performing stress analysis on the disc spring assembly, the guide rail assembly and the barrier assembly to determine the actual stress condition of the disc spring assembly in the disc spring device; Establishing a compression theoretical value model of the disc spring device, the compression theoretical value model comprising a compression load capacity calculation method of the disc spring; Inputting the geometric parameters of the disc spring into the compression theoretical value model, the geometric parameters comprising one or more of the disc spring outer diameter, the disc spring inner diameter, the disc spring free height, the disc spring thickness, the disc spring material Poisson's ratio and the disc spring material elastic modulus; Inputting the disc spring calculation coefficient into the compression theoretical value model to obtain the compression theoretical value of the disc spring assembly output by the compression theoretical value model.

3. The method of claim 2, wherein, The compression load capacity calculation method of the disc spring comprises a single disc spring load value calculation method and a single disc spring stiffness calculation method; the single disc spring load value calculation method is: ; single said disc spring stiffness calculation method is: ， ； wherein, is the single disc spring load value, N is the single disc spring stiffness, and are calculation factors, E is the modulus of elasticity, is the Poisson's ratio, is the thickness of the single disc spring, is the thickness of the single disc spring after thinning, s is the deformation of the single disc spring, D is the outer diameter of the disc spring, d is the inner diameter of the disc spring, h 0 is the calculated deformation value of the disc spring when flattened, is the ratio of the outer diameter D to the inner diameter d .

4. The method of claim 2, wherein, The method comprises: Calculating the error of the characteristic value of the compression prediction value and the characteristic value of the compression theoretical value, and comparing the error with a preset threshold value.

5. A disc spring device using the ABAQUS-based prediction method of the compression performance of a disc spring according to any one of claims 1 to 4, characterized by The disc spring device comprises a disc spring assembly, a guide rail assembly and a barrier assembly; wherein the disc spring assembly comprises a plurality of disc springs, and the barrier comprises a first limiting piece and a second limiting piece; A plurality of disc springs are combined in series, in parallel or in a composite manner; each disc spring passes through the guide rail assembly through a respective central hole, and the first limiting piece and the second limiting piece are arranged at two ends of the disc spring assembly respectively; The disc spring device further comprises a gasket, the outer diameter of the gasket is greater than the outer diameter of any disc spring, so as to ensure that the gasket completely covers the end face of the disc spring and provides sufficient protection and support. The disc spring device further comprises a first fixing member and a second fixing member, which are connected with the guide rail assembly by welding or nut assembly, one side of the first fixing member is in contact with the gasket, the distance between the first fixing member and the second fixing member in the first direction is the same as the height of the disc spring assembly and the gasket after pre-pressing, when a reciprocating displacement is applied at the loading point of the guide rail, the force is transmitted to the first fixing member through the guide rail assembly, and then to the gasket and the disc spring assembly through the first fixing member; The side of the first fixing member away from the loading point is flush with the side of the first limiting member away from the loading point; the side of the second fixing member away from the loading point is flush with the side of the second limiting member away from the loading point; The arrangement of the first fixing member, the second fixing member, the first limiting member and the second limiting member is configured to ensure that the disc spring assembly is always in a compressed state when a reciprocating displacement is applied at the loading end of the guide rail assembly.

6. The disc spring device according to claim 5, characterized in that The inner diameter of the first limiting member is greater than the outer diameter of the second limiting member; the diameter of the guide rail assembly is less than the inner diameter of any disc spring.

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