Belleville spring compression performance prediction method based on ABAQUS and belleville spring device

Abstract

The invention discloses an ABAQUS-based belleville spring compression performance prediction method and a belleville spring device, and relates to the technical field of numerical simulation. According to the scheme, the method comprises the steps that the compression prediction value of the belleville spring device is obtained based on the ABAQUS method, the compression performance of the belleville spring device is analyzed, the limitation of an existing theory and test method can be overcome, and the compression performance of the belleville spring can be efficiently and accurately predicted.

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 of large stiffness, high load capacity, strong energy consumption capacity and small space occupation. Accurate prediction of the performance of disc spring devices under compression conditions (such as load capacity, deformation characteristics, plastic region distribution, etc.) is crucial to ensure 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 load 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, costly, and 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

[0005] 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.

[0006] To solve the above technical problems, the embodiments of the present specification are implemented as follows: 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 tested including a disc spring assembly, a guide rail assembly and a blocking assembly, the disc spring assembly including a plurality of disc springs, comprising: obtaining a disc spring finite element model corresponding to the disc spring device to be tested by sweeping the solid components of the disc spring device to be tested; defining a disc spring material constitutive, and importing the actual material of the disc spring device to be tested into the disc spring finite element model; 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; Input the compression working condition of the disc spring device to be tested into the disc spring finite element model, the compression working condition including the target displacement or 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.

[0007] In a second aspect, the embodiment of the present specification provides a disc spring device, the disc spring device to be tested comprising 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; 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 respectively arranged at both ends of the disc spring assembly.

[0008] 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, the compression performance of the disc spring device is analyzed, the limitations of the existing theoretical and experimental methods can be overcome, and the compression performance of the disc spring can be efficiently and accurately predicted. BRIEF DESCRIPTION OF DRAWINGS

[0009] 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.

[0010] 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; 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; Figure 3 A comparison diagram of the load-displacement curve output by the disc spring finite element model and the compression theoretical value model provided by an embodiment of the present specification is shown in the figure; Figure 4 A structural diagram of a disc spring device provided by an embodiment of the present specification is shown in the figure; Figure 5Grid diagram of disc spring device provided for the embodiment of the present specification; Figure 6 Grid diagram of single disc spring provided for the embodiment of the present specification; Figure 7 Coupling interface diagram of first limiting member provided for the embodiment of the present specification; Figure 8 Coupling interface diagram of second limiting member provided for the embodiment of the present specification; Figure 9 Coupling interface diagram of loading area of disc spring device provided for the embodiment of the present specification; Figure 10 Boundary condition diagram of disc spring device provided for the embodiment of the present specification; Figure 11 A-A sectional view of disc spring device provided for the embodiment of the present specification; Figure 12 Stress nephogram of disc spring device provided for the embodiment of the present specification; Figure 13 Stress nephogram of disc spring assembly provided for the embodiment of the present specification; Figure 14 Plastic region distribution diagram of single disc spring provided for the embodiment of the present specification; Figure 15 Load-displacement curve diagram of disc spring device under reciprocating load provided for the embodiment of the present specification.

[0011] Explanation of reference signs: 1, disc spring device; 2, disc spring assembly; 3, first limiting member; 4, second limiting member; 5, guide rail assembly; 6, single disc spring; 7, first fixing member; 8, gasket; 9, central axis; 10, plastic region; 11, elastic region; 12, first limiting member coupling surface; 13, second limiting member coupling surface; 14, guide rail assembly loading point coupling surface; 15, disc spring device grid; 16, single disc spring grid, 17, second fixing member. DETAILED DESCRIPTION

[0012] In order to make the purpose, technical scheme and advantages of one or more embodiments of the present specification more clear, the technical scheme of one or more embodiments of the present specification will be described clearly and completely below in combination with the specific embodiments of the present specification and corresponding drawings. Obviously, the described embodiments are only 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 making creative efforts fall within the scope of protection of one or more embodiments of the present specification.

[0013] The technical solutions provided by the embodiments of the present specification are described in detail below with reference to the drawings.

[0014] The ABAQUS-based disc spring compression performance prediction method provided by the embodiments of the present specification is described in detail with reference to the drawings.

[0015] Figure 1 The flowchart of the ABAQUS-based disc spring compression performance prediction method provided by the embodiments of the present specification.

[0016] ABAQUS is a powerful finite element software for engineering simulation.

[0017] The finite element model of the disc spring device can be established by using ABAQUS to predict the compression performance of the disc spring device with high precision. The ABAQUS-based disc spring compression performance prediction method is applied to the disc spring device, the disc spring device to be tested 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 the drawing, the flowchart can include the following steps: Figure 1 Step 110: Obtain the disc spring finite element model corresponding to the disc spring device to be tested by sweeping the solid components of the disc spring device to be tested.

[0018] In the embodiments of the present specification, the disc spring finite element model consistent with the geometric characteristics of the actual object is obtained by sweeping the solid components of the disc spring device, and the sweeping method is used for modeling to ensure the model accuracy.

[0019] Step 120: Define the disc spring material constitutive, and import the actual material of the disc spring device to be tested into the disc spring finite element model.

[0020] In the embodiments of the present specification, the actual material properties of each component in the disc spring device are imported into the disc spring finite element model, and the guide rail assembly and the blocking assembly use Q345 steel material properties.

[0021] Step 130: Set the contact conditions between the disc spring assembly, the guide rail assembly and the blocking assembly, and the boundary conditions of the guide rail assembly and the blocking assembly.

[0022] ​In the embodiments of the present specification, the disc spring assembly can include a plurality of individual disc springs, and the contact conditions between the disc spring assembly, the guide rail assembly and the blocking assembly are set, including the contact between the disc springs, the contact between the disc springs and the guide rail assembly, and the contact between the disc springs and the blocking assembly. For example, the friction coefficient between the disc springs can be 0.036, the friction coefficient between the disc springs and the guide rail assembly can be 0.06, and the friction coefficient between the disc springs and the blocking assembly can be 0.06; the friction coefficient between the guide rail assembly and the blocking assembly can be 0.2.

[0023] The boundary conditions of the blocking assembly are defined as limiting the freedom of six directions, and the guide rail assembly limits the freedom of four directions except the axial direction and the rotation around the axial direction, so as to simulate the actual constraint condition.

[0024] In practice, the disc spring assembly, the guide rail assembly and the blocking assembly are assembled before the contact conditions and the boundary conditions are set.

[0025] Step 140: input the compression working condition of the disc spring device to be tested into the disc spring finite element model, and the compression working condition includes a target displacement or a maximum deformation value of the disc spring assembly.

[0026] In the embodiments of the present specification, the compression working condition of the disc spring device expected in the engineering project is input into the disc spring finite element model, the compression working condition includes a target displacement or a maximum deformation value that the disc spring assembly needs to reach, and the load condition in ABAQUS is set to match the compression condition in the actual engineering project, and the actual stress state is simulated by taking the tension of the guide rail assembly as positive and the compression as negative.

[0027] Step 150: analyze the compression performance of the disc spring according to the compression prediction value of the disc spring assembly output by the disc spring finite element model.

[0028] In the embodiments of the present specification, the compression prediction value of the disc spring assembly is output by calculation according to the disc spring finite element model, and the compression prediction value can include a compression load and a plastic region distribution. Specifically, the reaction force at the loading point is extracted as the load value of the disc spring assembly, the load-displacement curve is fitted, the stress distribution cloud chart is output, the maximum stress value at the maximum displacement is extracted, and the proportion of the plastic region is analyzed. The characteristic values of the disc spring device to be evaluated are analyzed, and the performance indicators such as the bearing capacity and the deformation characteristics are evaluated to verify whether the design requirements of the engineering project are met.

[0029] In practice, through the systematic modeling and simulation process, the prediction accuracy of the compression performance of the disc spring device is effectively improved, and a fast and accurate analysis tool is provided for engineering design.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] Optionally, the method described in the embodiments of this specification includes: 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. 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. 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. 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.

[0034] 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.

[0035] 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.

[0036] In order to optimize the theoretical value model of the pressure, the adjusted, adapted and simplified calculation coefficients can be input into the theoretical value model of the pressure to improve the accuracy of the theoretical calculation.

[0037] After the input of the geometric parameters and the calculation coefficients is completed, the theoretical value model of the pressure is run for calculation, and the theoretical value of the disc spring assembly under the expected pressure working condition is output, including the key performance indicators such as the pressure bearing capacity and the deformation amount.

[0038] The establishment of the 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.

[0039] Further, optionally, the method for calculating the pressure bearing capacity of the disc spring in the embodiments of the present specification 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: The single disc spring stiffness calculation method is: ,

[0040] wherein, is the single disc spring load value, N is the single disc spring stiffness, and are calculation coefficients, is the elastic modulus, is the Poisson's ratio, is the thickness of the single disc spring, is the thickness of the single disc spring after thinning, is the deformation amount of the single disc spring, D is the outer diameter of the disc spring, is the inner diameter of the disc spring, is the deformation value calculated when the disc spring is flattened, is the ratio of the outer diameter D to the inner diameter .

[0041] Optionally, the method in the embodiments of the present specification comprises: calculating the error between the predicted characteristic value in the pressure prediction value and the theoretical characteristic value in the pressure theoretical value, and comparing the error with a preset threshold.

[0042] In the embodiments of the present specification, the compression predicted value and the compression theoretical value each include characteristic values such as yield load value, ultimate load value, restoring force load value, initial stiffness, yield stiffness, and unloading stiffness. The above-mentioned characteristic values corresponding to the compression predicted value and the compression theoretical value are compared respectively, and the error is calculated. The error calculation formula is ((predicted value-theoretical value) / theoretical value) x 100%. For example, the error of the yield load value in the compression predicted value and the yield load value in the compression theoretical value is calculated.

[0043] The preset threshold value can be 15%. Specifically, if the error of all characteristic values is within 15%, it is considered that the disc spring device is suitable for the engineering project; if the error of any characteristic value is greater than or equal to 15%, it is considered that the disc spring device design method or the disc spring of the size / type is not suitable for the engineering project, and can be redesigned and simulated again.

[0044] Figure 2 An application scenario schematic diagram of a disc spring compression performance prediction method based on ABAQUS provided by the embodiments of the present specification is shown.

[0045] As shown in Figure 2 , the whole process of predicting the compression performance of the disc spring device is shown, modeling and analysis are performed from two angles of theoretical model and finite element model, and finally the compression performance of the disc spring device is accurately predicted through result comparison.

[0046] Step 201: determine the disc spring device; Step 202: clarify the stress condition of the disc spring, and clarify the force condition of the disc spring in different stages of system operation Step 203: establish a compression theoretical value model, based on the stress condition, establish a theoretical model of the disc spring in the compression state; Step 204: input the geometric parameters of the disc spring, and match the finite element model; Step 205: import the calculation coefficient of the disc spring; Step 206: output the compression theoretical value of the disc spring in the compression state, such as load-displacement curve, etc. Step 207: use ABAQUS to establish a finite element model of the disc spring device; Step 208: define the material constitutive of the disc spring, the stress-strain relationship of the material in the stress process; Step 209: assemble the disc spring device, assemble the disc spring with the guide rail assembly and the blocking assembly to form a complete device model; Step 210: set the interaction and boundary conditions, set the interaction between each component and the boundary conditions of the model; Step 211: input the actual compression working condition of the disc spring, and fit the characteristics of the disc spring in the compression state, such as load-displacement curve; Step 212: axial tension and compression load analysis, extract the compression load and the plastic region distribution of the disc spring; 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; Step 214: predict the compression performance of the disc spring device, and evaluate the performance under different working conditions.

[0047] In actual operation, the finite element model suitable for compression analysis of the disc spring device can be efficiently and accurately established, the complex contact, large deformation and material nonlinear (including plastic) behavior of the disc spring assembly in the device (especially under bidirectional compression) can be effectively handled, and the classical theoretical model can be effectively combined and verified, so as to ensure the accuracy of the output compression performance evaluation of the disc spring device.

[0048] Figure 3 A comparison diagram of the load-displacement curve output by the disc spring finite element model and the compression theoretical value model provided by the embodiments of the present specification is shown.

[0049] As Figure 3 shown, the compression predicted value curve corresponding to the disc spring finite element model and the compression theoretical value curve corresponding to the compression theoretical value model are shown, and the two curves are well fitted, reflecting the dynamic response of the load to the displacement change of the disc spring device during compression.

[0050] A disc spring device described in an embodiment of the present specification can 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 assembly includes a first limiting piece 3 and a second limiting piece 4. The plurality of disc springs are combined in series, parallel or composite manner; each disc spring passes through the guide rail assembly 5 through a respective central hole, and the first limiting piece 3 and the second limiting piece 4 are respectively arranged at both ends of the disc spring assembly 2.

[0051] Figure 4 A structure diagram of the disc spring device provided by the embodiments of the present specification is shown.

[0052] As Figure 4 shown, the disc spring device under test 1 can include a disc spring assembly 2, a guide rail assembly 5 and a blocking assembly, wherein the disc spring assembly 2 is a core force component, which bears the main elastic deformation and bearing capacity; the guide rail assembly 5 provides guidance and support for the disc spring; and the blocking assembly is used to limit the deformation range of the disc spring, and ensure stable operation of the device.

[0053] The disc spring assembly 2 is composed of multiple single disc springs 6, which can be combined in series, parallel or composite according to actual needs. Series combination can increase the total deformation of the device, suitable for occasions requiring larger deformation range; parallel combination can improve the carrying capacity of the device, suitable for high carrying requirement scenarios; composite combination combines the advantages of series and parallel. Each disc spring is designed with a center hole, through which the disc springs can pass through the guide rail assembly 5 in sequence to realize axial movement along the guide rail direction. Each disc spring is kept in center alignment.

[0054] Disc spring assembly load value when in series Disc spring assembly deformable height Disc spring assembly total height .

[0055] Wherein, is the number of disc springs; is the height of a single disc spring, i.e. the upper and lower limit height of the cross section of a single disc spring. and are reference data.

[0056] Disc spring assembly load value when in parallel Disc spring assembly deformable height Disc spring assembly total height .

[0057] The guide rail assembly 5 can provide precise guidance for the disc springs. The matching of 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.

[0058] The blocking assembly can include a first limiting piece 3 and a second limiting piece 4, respectively arranged 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.

[0059] During assembly, each component has a central axis 9, and all components can be assembled according to the position of the central axis 9 during assembly. The central axes 9 of all components need to be in center alignment.

[0060] After assembly, the first limiting piece 3 on the side close to the loading point, the second limiting piece 4 on the side away from the loading point, and one side of the guide rail loading end are coupled to a point to provide convenience for subsequent constraints on the device (constraints can be set only on the point, and the effect is equivalent to setting constraints on the entire surface). The guide rail assembly loading point coupling surface 14 is at the loading point position.

[0061] During the assembly process, the plurality of disc springs are sequentially passed through the guide rail assembly 5 through the respective central holes to form the disc spring assembly 2. The disc springs include the contact between the support surfaces and the contact between the inner conical surfaces, which ensures that there is no gap or overlapping part between adjacent disc springs during the assembly. Then, the first limiting member 3 and the second limiting member 4 are respectively installed at both ends of the disc spring assembly 2 to complete the assembly of the blocking assembly. Finally, the entire device is debugged and detected to ensure that the components are tightly matched and stably operated.

[0062] In practice, the disc spring device 1 can reciprocally load a point, and ensure that the disc spring assembly 2 in the disc spring device 1 always maintains a compressed state under tension and compression.

[0063] Optionally, in the embodiments of the present specification, the inner diameter of the first limiting member 3 is greater than the outer diameter of the second limiting member 4; and the diameter of the guide rail assembly 5 is less than the inner diameter of any disc spring.

[0064] In the embodiments of the present specification, the inner diameter of the first limiting member 3 is greater than the outer diameter of the second limiting member 4, which can ensure 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 less than the inner diameter of any disc spring, which realizes the accurate guidance and free movement of the disc spring in the guide rail direction.

[0065] Optionally, in the embodiments of the present specification, the disc spring device 1 can further include a gasket 8, and the outer diameter of the gasket 8 is greater than the outer diameter of any disc spring.

[0066] In the embodiments of the present specification, the gasket 8 is used to disperse pressure, protect the surface of the disc spring from direct damage, and provide additional support or adjustment space. The outer diameter of the gasket 8 is greater than the outer diameter of the disc spring, which can ensure that the gasket 8 can completely cover the end surface of the disc spring, providing sufficient protection and support.

[0067] In practice, the disc spring device 1 can further 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 with the guide rail assembly 5 by welding or nut assembly, etc. One side of the first fixing member is in contact with the gasket 8, and 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 2 and the gasket 8 after pre-compression. 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 5, and then transmitted to the gasket 8 and the disc spring assembly 2 through the first fixing member.

[0068] 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; and 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.

[0069] When the pressure is applied, the fixed member and the guide rail assembly 5 are fixed, at this time, the fixed member close to the loading point of the guide rail assembly 5 is displaced at the same time as the guide rail assembly 5, and the fixed member far from the loading point is separated from the gasket 8 due to the existence of the limiting member, so as to realize the compression of the disc spring assembly 2; when the tension is applied, the force is conducted from the guide rail assembly 5 to the gasket 8 and the disc spring assembly 2 through the fixed member, at this time, the fixed member close to the loading point is separated from the gasket 8 due to the existence of the limiting member.

[0070] The direction of the tension and compression force is set as the direction from the first limiting member 3 to the second limiting member 4 as the compression, that is, the first direction is the compression; the direction from the second limiting member 4 to the first limiting member 3 is the tension, that is, the direction opposite to the first direction is the tension.

[0071] The distance between the first limiting member 3 and the second limiting member 4 is fixed, and the disc spring assembly 2 will be deformed and the height will be reduced when the disc spring assembly 2 is compressed. The distance between the fixed members is equivalent to the distance between the first limiting member 3 and the second limiting member 4, and after the disc spring assembly 2 is compressed and deformed, the distance between the fixed members will be different from the height of the disc spring assembly 2, and the gasket 8 will be separated from the fixed member due to the blocking of the limiting member.

[0072] The different components work together to realize that only one point needs to be loaded to ensure that the disc spring assembly 2 always maintains compression during compression.

[0073] Optionally, in the embodiment of the present specification, the center point of one side of the guide rail assembly 5 is selected as the loading end, and is selected as the load output point.

[0074] In practice, in order to ensure the deformation expression accuracy of the disc spring, the grid division size of the disc spring finite element model can be less than 1 / 2 of the thickness of the disc spring.

[0075] Figure 5 The grid schematic diagram of the disc spring device provided by the embodiment of the present specification is shown in the figure; Figure 6 The grid schematic diagram of a single disc spring provided by the embodiment of the present specification is shown in the figure.

[0076] As shown in the figures Figure 5 and Figure 6 , the finite element grid division of the entire disc spring device is shown, the grid details of a single disc spring are shown, and the components such as the disc spring, the guide rail and the limiting member need to be selected according to the stress characteristics.

[0077] Figure 7 The coupling interface schematic diagram of the first limiting member provided by the embodiment of the present specification is shown in the figure;The coupling interface schematic diagram of the second limiting member provided by the embodiment of the present specification is shown in the figure. Figure 8

[0078] As shown in the figures Figure 7 and Figure 8As shown, the coupling mode and contact relationship of the first limiting member and the disc spring assembly are shown, and the coupling mode and contact relationship of the second limiting member and the disc spring assembly are shown.

[0079] Figure 9 The coupling interface diagram of the loading area of the disc spring device provided by the embodiment of the present specification is shown.

[0080] As shown Figure 9 As shown, how the external load is applied to the device is shown, and the load transmission path is shown.

[0081] Figure 10 The boundary condition diagram of the disc spring device provided by the embodiment of the present specification is shown.

[0082] As shown Figure 10 As shown, fixed constraints are applied to the outer edges of the guide rail assembly and the limiting member, defining the constraint conditions of the disc spring device, ensuring that the analysis is convergent and consistent with the actual working conditions.

[0083] Figure 11 The A-A cross-sectional view of the disc spring device provided by the embodiment of the present specification is shown.

[0084] As shown Figure 11 As shown, the internal structure of the device and the relative positions of the components are shown through the cross-sectional view.

[0085] Figure 12 The stress cloud diagram of the disc spring device provided by the embodiment of the present specification is shown. As shown Figure 12 As shown, the overall stress distribution of the disc spring device under loading is shown, and the high stress area can be identified.

[0086] Figure 13 The stress cloud diagram of the disc spring assembly provided by the embodiment of the present specification is shown.

[0087] As shown Figure 13 As shown, the stress distribution of the disc spring assembly under stress is shown, and the stress cloud diagram of the disc spring assembly includes the proportion of the plastic region of the disc spring assembly to the entire disc spring assembly region, and the plasticity is the yield stress value in the input material properties of the disc spring.

[0088] The maximum stress is 1500MPa, which does not exceed the input yield stress 1600MPa, indicating that all regions of the disc spring assembly under this method do not appear plastic deformation, and are in the elastic state. The maximum stress is at the support end, indicating that the disc spring device meets the expectations, and the disc spring finite element model is applicable.

[0089] Figure 14 The plastic region distribution diagram of a single disc spring provided by the embodiment of the present specification is shown.

[0090] As shown in Figure 14 , the plastic deformation area of a single disc spring under loading is shown, and its load-carrying capacity can be evaluated.

[0091] Figure 15 The schematic diagram of load-displacement curve of the disc spring device under reciprocating load provided by the embodiments of the present specification.

[0092] As shown in Figure 15 , the X-axis represents displacement, and the Y-axis represents load, , the starting displacement of the disc spring device, the load-displacement curve of the disc spring device under the action of reciprocating load is generally a typical "double flag shape", and the characteristic values include: yield load , ultimate load (typically the load value at the maximum displacement of the disc spring assembly), restoring force load , initial stiffness , yield stiffness , and unloading stiffness . The characteristic load values at the above corresponding displacements obtained by finite element analysis can evaluate the load that the disc spring device can achieve under a certain displacement in actual engineering projects and the stress distribution or deformation condition of the disc spring device, so as to evaluate whether the disc spring device meets the design requirements of the engineering project.

[0093] Each of the embodiments in the present specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the difference from other embodiments.

[0094] The above describes a specific embodiment of the present specification, and other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily have to be implemented in the specific order shown or in a continuous order to achieve the desired results. Each of the embodiments in the present specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the difference from other embodiments.

[0095] It should also be noted that the terms "comprising," "including," or any other variation thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises a... " does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0096] The above description is merely illustrative of the embodiments of the application and is not intended to limit the scope of the application. Various modifications and changes can be made by persons of ordinary skill in the art, which should be within the spirit and principle of the application. Any modification, equivalent replacement, improvement, and the like made without departing from the spirit and principle of the application should be included in the scope of claims of the 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, the disc spring device to be measured comprises a disc spring assembly, a guide rail assembly and a barrier assembly, the disc spring assembly comprises a plurality of disc springs, and the method comprises the following steps: Obtaining a disc spring finite element model corresponding to the disc spring device to be measured by sweeping the physical components of the disc spring device to be measured; Defining a disc spring material constitutive relation and introducing the actual material of the disc spring device to be measured into the disc spring finite element model; Setting the contact conditions among 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 a compression working condition of the disc spring device to be measured into the disc spring finite element model, wherein the compression working condition comprises a target displacement or a limit deformation value of the disc spring assembly; Analyzing the compression performance of the disc spring according to the compression predicted value of the disc spring assembly output by the disc spring finite element model.

2. The method of claim 1, wherein, The method comprises the following steps: 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 to be measured; Establishing a compression theoretical value model of the disc spring device to be measured, wherein the compression theoretical value model comprises a compression load bearing capacity calculation method of the disc spring; Inputting the geometric parameters of the disc spring into the compression theoretical value model, wherein the geometric parameters comprise one or more of the following: an outer diameter of the disc spring, an inner diameter of the disc spring, a free height of the disc spring, a thickness of the disc spring, a Poisson's ratio of the disc spring material and an elastic modulus of the disc spring material; 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 pressure bearing 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 stiffness calculation method is: ， ； wherein, F is the single disc spring load value, N is the single disc spring stiffness, and are calculation factors, E is the modulus of elasticity, v is the Poisson's ratio, t is the thickness of the single disc spring, t is the thickness of the single disc spring after thinning, is the deformation of the single disc spring, D D is the outer diameter of the disc spring, d is the inner diameter of the disc spring, is the calculated deformation value when the disc spring is flattened, is the ratio of the outer diameter D to the inner diameter .

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

5. A disc spring device characterized by comprising: The disc spring device to be measured 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; The plurality of disc springs are combined in a 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.

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

7. A disc spring device according to claim 5 or 6, characterised in that The method further comprises a gasket, and the outer diameter of the gasket is greater than the outer diameter of any disc spring.

Images