Strength simulation method, device and equipment for transversely-arranged double-piece continuous fiber plate spring

Abstract

The invention relates to a strength simulation method, device and equipment for a transversely-arranged double-piece continuous fiber spring, and the method comprises the steps: carrying out the cutting of the transversely-arranged double-piece continuous fiber spring, building a local coordinate system of each fiber spring segment, carrying out the grid division of the corresponding fiber spring based on the laying layer base surface of each fiber spring, and obtaining a local coordinate system of each fiber spring segment; establishing a Set unit set by grids within the length range of each fiber laying layer, and stacking the fiber laying layers according to the material attribute of each fiber laying layer and the attribute of the laminated plate to obtain the composite laminated plate. The composite material laminated plates are stacked according to the stacking direction of the composite material laminated plates to obtain a simulation model of each fiber plate spring, a simulation model of the suspension system is established according to the simulation model of each fiber plate spring, the second connection relation and the first connection relation, and strength testing is conducted on the simulation model of the suspension system. And obtaining a strength simulation result. Therefore, the problems that in simulation, calculation is not convergent, boundary conditions are prone to distortion, and layering modeling is not accurate are solved.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to a method, apparatus and equipment for simulating the strength of a transverse double-leaf continuous fiber spring. Background Technology

[0002] Lightweight design has always been a pursuit of new energy vehicles. Currently, the main dimensions of automotive lightweighting include: structural lightweighting, material lightweighting, and process lightweighting. Among these, material lightweighting is the most effective method, especially the use of continuous fiber layup structures, which has a significant lightweighting effect.

[0003] Some models utilize a new continuous fiber plywood leaf spring mechanism, featuring transversely placed double leaf springs connected by a spherical pin. The entire mechanism is connected to the rear suspension via rubber bushings, simultaneously functioning as a control arm, stabilizer bar, and coil spring. However, this new long fiber plywood leaf spring mechanism presents the following challenges in strength calculations: 1. The presence of the spherical pin causes the model to fail to converge during overall loading strength calculations due to the mechanism's motion; 2. When calculating the strength of the composite leaf springs separately using the inertial release method based on hard-point load decomposition, structural deformation cannot be referenced, and inertial release cannot support nonlinear calculations; 3. The method of constraining certain degrees of freedom through local loading results in either over- or under-constraint. Summary of the Invention

[0004] This application provides a strength simulation method, apparatus, and equipment for transverse double-leaf continuous fiber leaf springs to solve the problems of non-convergence calculation, distorted boundary conditions, and inaccurate ply modeling in the simulation of transverse double-leaf continuous fiber leaf springs. It realizes high-precision and high-convergence strength simulation of transverse double-leaf continuous fiber leaf spring suspensions under real load and constraint conditions.

[0005] The first aspect of this application provides a method for simulating the strength of a transversely placed double-leaf continuous fiber spring, comprising the following steps: Import the suspension system geometric model, wherein the suspension system geometric model includes a transverse double continuous fiber leaf spring; Determine the first connection relationship of the geometric model of the suspension system and the second connection relationship of the transverse double-leaf continuous fiber spring. According to the preset layup information table, the transverse double continuous fiber leaf spring is cut to obtain multiple fiber leaf spring segments, and a local coordinate system is established for each fiber leaf spring segment. The ply base surface of each fiber leaf spring is determined, and the corresponding fiber leaf spring is meshed based on the ply base surface of each fiber leaf spring, wherein the normal direction of each mesh is along a preset ply direction. According to the preset layup parameter table, the grid within the length range of each fiber layup layer is established as a Set of cells, and the material properties and laminate properties of each fiber layup layer are determined. The fiber layups are stacked according to the material properties of each fiber layup layer and the laminate properties to obtain a composite material laminate. The stacking direction of the composite laminate is determined, and the composite laminate is stacked according to the stacking direction to obtain a simulation model of each fiber leaf spring. A simulation model of the transverse double-leaf continuous fiber leaf spring is established based on the simulation model of each fiber leaf spring and the second connection relationship. A simulation model of the suspension system is established based on the simulation model of the transverse double-leaf continuous fiber leaf spring and the first connection relationship. Strength tests are performed on the simulation model of the suspension system to obtain strength simulation results.

[0006] Optionally, in some embodiments, the local coordinate system of each fiber leaf spring segment includes: For the straight sections of the fiber leaf spring, a rectangular coordinate system is used to establish a local coordinate system, while for the curved sections, a cylindrical coordinate system is used to establish a local coordinate system.

[0007] Optionally, in some embodiments, the step of performing a strength test on the simulation model of the suspension system to obtain strength simulation results includes: A load is applied at the steering knuckle center position of the suspension system, and the strength values ​​of the transverse double continuous fiber leaf spring under various load conditions are calculated. The strength simulation results are obtained based on the strength values ​​of the transverse double continuous fiber leaf spring under the various load conditions.

[0008] Optionally, in some embodiments, the load conditions include at least one of the following: vertical impact condition, extreme turning condition, emergency braking condition, torsional condition, and curb impact condition.

[0009] A second aspect of this application provides a strength simulation device for a transversely placed double-leaf continuous fiber spring, comprising: An import module is used to import a suspension system geometric model, wherein the suspension system geometric model includes a transverse double-leaf continuous fiber spring; The determination module is used to determine the first connection relationship of the geometric model of the suspension system and the second connection relationship of the transverse double-leaf continuous fiber spring. The cutting module is used to cut the transverse double continuous fiber leaf spring into multiple fiber leaf spring segments according to a preset layup information table, and to establish a local coordinate system for each fiber leaf spring segment. The mesh generation module is used to determine the ply base surface of each fiber leaf spring and to perform mesh generation on the corresponding fiber leaf spring based on the ply base surface of each fiber leaf spring, wherein the normal direction of each mesh is along a preset ply direction. The composite module is used to establish a set of cells within the length range of each fiber layup according to a preset layup parameter table, determine the material properties and laminate properties of each fiber layup, and stack the fiber layups according to the material properties and laminate properties of each fiber layup to obtain a composite material laminate. The simulation module is used to determine the stacking direction of the composite laminates, stack the composite laminates according to the stacking direction to obtain a simulation model of each fiber leaf spring, establish a simulation model of the transverse double-leaf continuous fiber leaf spring according to the simulation model of each fiber leaf spring and the second connection relationship, establish a simulation model of the suspension system according to the simulation model of the transverse double-leaf continuous fiber leaf spring and the first connection relationship, and perform strength testing on the simulation model of the suspension system to obtain strength simulation results.

[0010] Optionally, in some embodiments, the cutting module includes: For the straight sections of the fiber leaf spring, a rectangular coordinate system is used to establish a local coordinate system, while for the curved sections, a cylindrical coordinate system is used to establish a local coordinate system.

[0011] Optionally, in some embodiments, the simulation module includes: The testing unit is used to apply a load to the steering knuckle center position of the suspension system, calculate the strength value of the transverse double continuous fiber leaf spring under various load conditions, and obtain the strength simulation result based on the strength value of the transverse double continuous fiber leaf spring under the various load conditions.

[0012] Optionally, in some embodiments, the load conditions include at least one of the following: vertical impact condition, extreme turning condition, emergency braking condition, torsional condition, and curb impact condition.

[0013] A third aspect of this application provides an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the strength simulation method for a transverse double-leaf continuous fiber spring as described in the above embodiments.

[0014] A fourth aspect of this application provides a computer-readable storage medium having a computer program stored thereon, which is executed by a processor to implement the strength simulation method for a transverse double-leaf continuous fiber spring as described in the above embodiments.

[0015] Therefore, this application uses Hypermesh preprocessing software to import the geometric model of the suspension system, which includes a transverse double-leaf continuous fiber composite leaf spring structure. It identifies the topological connections of the suspension system and the connections of the transverse double-leaf leaf spring structure; segments the geometric model of the continuous fiber leaf spring and establishes a local coordinate system; uses S4R elements to mesh the leaf spring, ensuring the direction is along the layup direction; establishes the anisotropic material properties of the continuous fiber; establishes the properties of the continuous fiber single layer and the laminate; establishes the properties and stacking direction of the composite laminate; establishes the Beam beam element suspension system; and establishes the transverse double-leaf continuous fiber mechanism and suspension system using rubber bushing elements and integrated spring elements. Finally, it submits the calculation model and evaluates the leaf spring strength. This solves the problems of non-convergence calculation, distorted boundary conditions, and inaccurate layup modeling of transverse double-leaf continuous fiber leaf springs in simulation, achieving high-precision, high-convergence strength simulation of the integrated transverse double-leaf continuous fiber leaf spring suspension under real load and constraint conditions.

[0016] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a flowchart of a strength simulation method for a transverse double-leaf continuous fiber spring provided according to an embodiment of this application; Figure 2 This is a schematic diagram of a suspension system provided according to an embodiment of this application; Figure 3 This is a schematic diagram of the connection relationship of a transverse double-sheet long fiber plywood leaf spring mechanism according to an embodiment of this application; Figure 4 This is a schematic diagram showing the cut-out of the upper leaf spring geometric model according to an embodiment of this application; Figure 5 This is a schematic diagram of a simulation model of a transverse double-sheet long fiber plywood leaf spring mechanism system provided according to an embodiment of this application; Figure 6 This is a flowchart of a strength simulation method for a transverse double-leaf continuous fiber spring according to an embodiment of this application; Figure 7 This is a block diagram of a strength simulation device for a transversely placed double-leaf continuous fiber spring provided according to an embodiment of this application; Figure 8 This is a schematic diagram of the structure of an electronic device provided according to an embodiment of this application. Detailed Implementation

[0018] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0019] The following describes a strength simulation method, apparatus, and electronic device for transverse double-leaf continuous fiber leaf springs according to embodiments of this application, with reference to the accompanying drawings. Addressing the problems mentioned in the background art regarding non-convergence in simulations of transverse double-leaf continuous fiber leaf springs, easily distorted boundary conditions, and inaccurate ply modeling, this application provides a strength simulation method for transverse double-leaf continuous fiber leaf springs. In this method, a suspension system geometric model is imported, including transverse double-leaf continuous fiber leaf springs. A first connection relationship and a second connection relationship of the suspension system geometric model and the transverse double-leaf continuous fiber leaf springs are determined. Based on a preset ply information table, the transverse double-leaf continuous fiber leaf springs are cut into multiple fiber leaf spring segments, and a local coordinate system is established for each fiber leaf spring segment. The ply base surface of each fiber leaf spring is determined, and a mesh is generated based on the ply base surface of each fiber leaf spring for the corresponding fiber leaf spring. The normal direction of each mesh is defined as follows: Along a preset ply direction, and according to a preset ply parameter table, a Set element set is established for the mesh within the length range of each fiber ply. The material properties and laminate properties of each fiber ply are determined. Based on these properties, the fiber plies are stacked to obtain a composite laminate. The stacking direction of the composite laminate is determined, and the laminates are stacked according to this direction to obtain a simulation model for each fiber leaf spring. A simulation model of a transverse double-leaf continuous fiber leaf spring is established based on the simulation model of each fiber leaf spring and the second connection relationship. A simulation model of the suspension system is then established based on the simulation model of the transverse double-leaf continuous fiber leaf spring and the first connection relationship. Strength tests are performed on the simulation model of the suspension system to obtain strength simulation results. This solves the problems of non-convergence calculation, distorted boundary conditions, and inaccurate ply modeling in the simulation of transverse double-leaf continuous fiber leaf springs, achieving high-precision, high-convergence strength simulation of the integrated transverse double-leaf continuous fiber leaf spring suspension under real load and constraint conditions.

[0020] Specifically, Figure 1 This is a flowchart illustrating a strength simulation method for a transversely placed double-leaf continuous fiber spring provided in an embodiment of this application.

[0021] like Figure 1 As shown, the strength simulation method for this transverse double-leaf continuous fiber spring includes the following steps: In step S101, the suspension system geometric model is imported, wherein the suspension system geometric model includes a transverse double continuous fiber leaf spring.

[0022] Specifically, in this embodiment of the invention, a geometric model of the rear suspension system of a certain vehicle model can be imported using Hypermesh software, including the subframe, steering knuckle, control arm, shock absorber, and continuous fiber layup composite leaf spring, such as... Figure 2 As shown, the vehicle coordinate system is as follows: the positive X-axis (direction 1) points from the front to the rear of the vehicle, the positive Z-axis (direction 3) points vertically upwards, and the positive Y-axis (direction 2) of the vehicle coordinate system conforms to the right-hand screw rule. The rotation directions around the X, Y, and Z axes represent directions 4, 5, and 6, respectively. The composite material leaf spring is a transverse double-leaf spring mechanism, which simultaneously functions as a lower control arm, spring, and stabilizer bar in the rear suspension system.

[0023] In step S102, the first connection relationship of the suspension system geometric model and the second connection relationship of the transverse double continuous fiber leaf spring are determined.

[0024] Specifically, such as Figure 3 As shown, the connection relationship of the transverse double-leaf continuous fiber plywood mechanism in the rear suspension system is identified to accurately establish the simulation model of the suspension system. The transverse double-leaf springs are connected to each other by spherical pins, and the continuous fiber leaf springs are connected to the steering knuckle and subframe respectively through metal joints (bolt connection) and rubber bushings. When the wheels on both sides bounce upward, the upper leaf spring mainly bears the load, and when the wheels bounce downward, the lower leaf spring mainly bears the load.

[0025] In step S103, according to the preset layup information table, the transverse double continuous fiber leaf spring is cut to obtain multiple fiber leaf spring segments, and a local coordinate system is established for each fiber leaf spring segment.

[0026] Furthermore, in some embodiments, the local coordinate system of each fiber leaf spring segment includes: a rectangular coordinate system for straight fiber leaf spring segments, and a cylindrical coordinate system for curved fiber leaf spring segments.

[0027] Specifically, such as Figure 4 As shown, the mechanism of the transverse double composite leaf spring contains 4 leaf springs. The modeling method of each long fiber layup composite leaf spring is the same. In this embodiment, the modeling process is specifically explained using the above leaf spring as an example. First, according to the preset layup information table, i.e. the long fiber layup length information table, the composite leaf spring is geometrically cut to ensure that the length after cutting covers the length range of each layer. At the same time, in order to ensure the continuity of fiber layup modeling, the geometric model needs to be divided into straight segments and arc segments, and a rectangular coordinate system and a cylindrical coordinate system are established respectively. Table 1 is a preset layer information table.

[0028] Table 1

[0029] In step S104, the ply base surface of each fiber leaf spring is determined, and the corresponding fiber leaf spring is meshed based on the ply base surface of each fiber leaf spring, wherein the normal direction of each mesh is along the preset ply direction.

[0030] The preset layup direction can be downward along the base surface.

[0031] Specifically, in this embodiment of the invention, the upper surface can be selected as the base surface for the long fiber layup, and the layup can be performed downward along the normal direction of the base surface. Therefore, after the upper surface is meshed (S4R elements), it is checked whether the normal direction of the mesh is all downward. If not, it is adjusted so that the normal direction is all downward.

[0032] In step S105, according to the preset layup parameter table, the mesh within the length range of each fiber layup is established as a Set unit set, and the material properties and laminate properties of each fiber layup are determined. The fiber layups are stacked according to the material properties and laminate properties of each fiber layup to obtain a composite material laminate.

[0033] Specifically, the properties of long fiber monolayer materials are established, including elastic modulus in directions 1 and 2, Poisson's ratio, and shear modulus in directions 12, 23, and 31. A set of elements (SET) is established. Based on the layup parameter table of the composite leaf spring, which contains information on the layup direction and length of each layer of fabric, the S4R elements contained within the layup length range of each layer are established as a Set of elements to prepare for the subsequent establishment of the properties of the composite monolayer plate.

[0034] Furthermore, the properties of single-layer composite materials and laminates are established: the properties of composite materials are set using the Ply+Stack layup definition method in Hypermesh, that is, the range of each physical layup of composite materials is defined, one physical layup corresponds to one ply card, and then the ply cards are stacked in sequence to form a complete laminate.

[0035] In step S106, the stacking direction of the composite laminate is determined, and the composite laminate is stacked according to the stacking direction to obtain a simulation model of each fiber leaf spring. A simulation model of a transverse double-leaf continuous fiber leaf spring is established based on the simulation model of each fiber leaf spring and the second connection relationship. A simulation model of the suspension system is established based on the simulation model of the transverse double-leaf continuous fiber leaf spring and the first connection relationship. The strength of the simulation model of the suspension system is tested to obtain the strength simulation results.

[0036] Specifically, the stacking direction of the composite laminate is defined. Since the normal direction of all elements points from the top surface to the bottom surface, and the stacking direction also points from the top surface to the bottom surface, in this example, only one property needs to be created to define the stacking direction of all elements.

[0037] Then, using the same method, a long fiber layup simulation model for the remaining three leaf springs was established. The metal ball head and the leaf springs were connected by rbe2 rigid body elements, and the two leaf springs were connected to each other by Jointc integrated spring elements to simulate the connection of the spherical pin.

[0038] In the suspension system, the subframe, steering knuckle, and control arm are modeled using equivalent beam elements, the shock absorbers are simulated using cycloid elements, and the connecting bushing between the subframe and control arm is simulated using bushing elements; the connecting bushing between the steering knuckle and control arm is also simulated using bushing elements. The long fiber plywood leaf spring mechanism is connected to the subframe and steering knuckle via rubber bushings, such as... Figure 7 As shown.

[0039] Furthermore, in some embodiments, a strength test is performed on the simulation model of the suspension system to obtain strength simulation results, including: applying a load at the steering knuckle center position of the suspension system, calculating the strength value of the transverse double continuous fiber leaf spring under various load conditions, and obtaining the strength simulation results based on the strength value of the transverse double continuous fiber leaf spring under various load conditions.

[0040] Optionally, in some embodiments, the load conditions include at least one of the following: vertical impact condition, extreme turning condition, emergency braking condition, torsional condition, and curb impact condition.

[0041] Specifically, in combination Figure 8 As shown, in this embodiment of the invention, after obtaining the simulation model of the suspension system, a load is applied at the steering knuckle wheel center position, and the strength performance of the long fiber plywood leaf spring mechanism is calculated under various load conditions such as vertical impact, extreme turning, emergency braking, torsion, and curb impact. Since the leaf spring mechanism is located in the suspension system, the actual rubber bushing and spherical pin stiffness are simulated inside the system through the Bushing unit and the jointc integrated spring unit, which restricts the free movement of the leaf spring mechanism in the system, consistent with the actual situation. There is no need to consider the constraints and non-convergence issues, and the deformation of the mechanism is also consistent with the actual situation.

[0042] Therefore, the present invention has the following beneficial effects: Firstly, the overall calculation method combining the Beam beam unit suspension system model with the continuous fiber layup transverse double leaf spring mechanism model solves the problems of non-convergence in mechanism calculation and the inability of inertial release to support nonlinearity.

[0043] Secondly, the spherical pins between the double leaf springs use Jointc integrated spring units, and the rubber bushings connecting the transverse double leaf springs to the subframe and steering knuckle all use Bushing units to accurately simulate the connection stiffness of the mechanism. The internal stiffness constrains the deformation of the mechanism, which is more consistent with the actual situation.

[0044] Thirdly, when loading the wheel center of the suspension system model, strong nonlinear problems such as material nonlinearity and large structural deformation can be considered, resulting in higher calculation accuracy.

[0045] Fourthly, the geometric structure of the continuous fiber layup leaf spring is segmented (straight and circular segments), and local rectangular and cylindrical coordinate systems are established to ensure the continuity of the continuous fiber layup in different segments and improve the calculation accuracy.

[0046] According to the strength simulation method for transverse double-leaf continuous fiber leaf springs proposed in this application, the method involves importing a suspension system geometric model, which includes transverse double-leaf continuous fiber leaf springs, determining the first connection relationship and the second connection relationship of the suspension system geometric model and the transverse double-leaf continuous fiber leaf springs, and cutting the transverse double-leaf continuous fiber leaf springs into multiple fiber leaf spring segments according to a preset layup information table, and establishing a local coordinate system for each fiber leaf spring segment. The method also determines the layup base surface of each fiber leaf spring and performs mesh generation on the corresponding fiber leaf spring based on the layup base surface of each fiber leaf spring, wherein the normal direction of each mesh is along a preset layup direction. Based on a preset layup parameter table, each layer of fiber leaf springs is laid... A set of elements is created by establishing a mesh within the layer length range, and the material properties of each fiber layup and the properties of the laminate are determined. Based on these properties, the fiber layups are stacked to obtain a composite laminate. The stacking direction of the composite laminate is determined, and the laminates are stacked according to this direction to obtain a simulation model for each leaf spring. A simulation model of a transverse double-leaf continuous fiber leaf spring is then established based on the simulation model of each leaf spring and the second connection relationship. Finally, a simulation model of the suspension system is established based on the simulation model of the transverse double-leaf continuous fiber leaf spring and the first connection relationship. Strength tests are performed on the simulation model of the suspension system to obtain the strength simulation results. This solves the problems of non-convergence calculation, distorted boundary conditions, and inaccurate layup modeling in the simulation of transverse double-leaf continuous fiber leaf springs, achieving high-precision and high-convergence strength simulation of the integrated transverse double-leaf continuous fiber leaf spring suspension under real load and constraint conditions.

[0047] Next, referring to the accompanying drawings, a strength simulation device for a transversely placed double-leaf continuous fiber spring according to an embodiment of this application is described.

[0048] Figure 7 This is a block diagram of the strength simulation device for a horizontally placed double-leaf continuous fiber spring according to an embodiment of this application.

[0049] like Figure 7 As shown, the strength simulation device 10 for the transverse double continuous fiber leaf spring includes: an import module 100, a determination module 200, a cutting module 300, a mesh generation module 400, a composite module 500, and a simulation module 600.

[0050] The import module 100 is used to import the suspension system geometric model, which includes a transverse double-leaf continuous fiber spring.

[0051] The determination module 200 is used to determine the first connection relationship of the geometric model of the suspension system and the second connection relationship of the transverse double continuous fiber leaf spring.

[0052] The cutting module 300 is used to cut the transverse double continuous fiber leaf spring into multiple fiber leaf spring segments according to the preset layup information table, and to establish a local coordinate system for each fiber leaf spring segment.

[0053] The meshing module 400 is used to determine the ply base surface of each fiber leaf spring and to perform meshing on the corresponding fiber leaf spring based on the ply base surface of each fiber leaf spring, wherein the normal direction of each mesh is along the preset ply direction.

[0054] The composite module 500 is used to establish a set of cells within the length range of each fiber layup according to a preset layup parameter table, determine the material properties and laminate properties of each fiber layup, and stack the fiber layups according to the material properties and laminate properties of each fiber layup to obtain a composite material laminate.

[0055] The simulation module 600 is used to determine the stacking direction of the composite laminates, stack the composite laminates according to the stacking direction to obtain a simulation model of each fiber leaf spring, establish a simulation model of the transverse double-leaf continuous fiber leaf spring based on the simulation model of each fiber leaf spring and the second connection relationship, establish a simulation model of the suspension system based on the simulation model of the transverse double-leaf continuous fiber leaf spring and the first connection relationship, perform strength tests on the simulation model of the suspension system, and obtain strength simulation results.

[0056] Optionally, in some embodiments, the cutting module 300 includes: a building unit.

[0057] The establishment unit is used to establish a local coordinate system using a rectangular coordinate system for the straight fiber leaf spring segment and a cylindrical coordinate system for the curved fiber leaf spring segment.

[0058] Optionally, in some embodiments, the simulation module 600 includes a test unit.

[0059] The testing unit is used to apply loads to the steering knuckle center of the suspension system, calculate the strength values ​​of the transverse double-leaf continuous fiber spring under various load conditions, and obtain the strength simulation results based on the strength values ​​of the transverse double-leaf continuous fiber spring under various load conditions.

[0060] Optionally, in some embodiments, the load conditions include at least one of the following: vertical impact condition, extreme turning condition, emergency braking condition, torsional condition, and curb impact condition.

[0061] It should be noted that the explanation of the aforementioned embodiment of the strength simulation method for transverse double-leaf continuous fiber leaf springs also applies to the strength simulation device for transverse double-leaf continuous fiber leaf springs in this embodiment, and will not be repeated here.

[0062] According to the strength simulation device for transverse double-leaf continuous fiber leaf springs proposed in this application, the device imports a suspension system geometric model, which includes transverse double-leaf continuous fiber leaf springs. It determines the first connection relationship and the second connection relationship of the suspension system geometric model and the transverse double-leaf continuous fiber leaf springs. Based on a preset layup information table, the transverse double-leaf continuous fiber leaf springs are cut into multiple fiber leaf spring segments, and a local coordinate system for each fiber leaf spring segment is established. The device determines the layup base surface of each fiber leaf spring and performs meshing on the corresponding fiber leaf spring based on the layup base surface of each fiber leaf spring. The normal direction of each mesh is along a preset layup direction. Based on a preset layup parameter table, each layer of fiber leaf springs is laid... A set of elements is created by establishing a mesh within the layer length range, and the material properties of each fiber layup and the properties of the laminate are determined. Based on these properties, the fiber layups are stacked to obtain a composite laminate. The stacking direction of the composite laminate is determined, and the laminates are stacked according to this direction to obtain a simulation model for each leaf spring. A simulation model of a transverse double-leaf continuous fiber leaf spring is then established based on the simulation model of each leaf spring and the second connection relationship. Finally, a simulation model of the suspension system is established based on the simulation model of the transverse double-leaf continuous fiber leaf spring and the first connection relationship. Strength tests are performed on the simulation model of the suspension system to obtain the strength simulation results. This solves the problems of non-convergence calculation, distorted boundary conditions, and inaccurate layup modeling in the simulation of transverse double-leaf continuous fiber leaf springs, achieving high-precision and high-convergence strength simulation of the integrated transverse double-leaf continuous fiber leaf spring suspension under real load and constraint conditions.

[0063] Figure 8 A schematic diagram of the structure of an electronic device provided in an embodiment of this application. The electronic device may include: The memory 801, the processor 802, and the computer program stored on the memory 801 and capable of running on the processor 802.

[0064] When the processor 802 executes the program, it implements the strength simulation method for the transverse double-sheet continuous fiber leaf spring provided in the above embodiments.

[0065] Furthermore, electronic devices also include: Communication interface 803 is used for communication between memory 801 and processor 802.

[0066] The memory 801 is used to store computer programs that can run on the processor 802.

[0067] The memory 801 may include high-speed RAM (Random Access Memory) memory, and may also include non-volatile memory, such as at least one disk storage.

[0068] If the memory 801, processor 802, and communication interface 803 are implemented independently, then the communication interface 803, memory 801, and processor 802 can be interconnected via a bus to complete communication between them. The bus can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, or an EISA (Extended Industry Standard Architecture) bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 8 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0069] Optionally, in a specific implementation, if the memory 801, processor 802, and communication interface 803 are integrated on a single chip, then the memory 801, processor 802, and communication interface 803 can communicate with each other through an internal interface.

[0070] The processor 802 may be a CPU (Central Processing Unit), an ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the embodiments of this application.

[0071] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method for simulating the strength of a transverse double-leaf continuous fiber spring.

[0072] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0073] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0074] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more N executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0075] It should be understood that the various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (FPGAs), field-programmable gate arrays (FPGAs), etc.

[0076] Those skilled in the art will understand that all or part of the steps of the methods described in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it includes one or a combination of the steps of the method embodiments.

[0077] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A method for simulating the strength of a transversely placed double-leaf continuous fiber spring, characterized in that, Includes the following steps: Import the suspension system geometric model, wherein the suspension system geometric model includes a transverse double continuous fiber leaf spring; Determine the first connection relationship of the geometric model of the suspension system and the second connection relationship of the transverse double continuous fiber leaf spring; According to the preset layup information table, the transverse double continuous fiber leaf spring is cut to obtain multiple fiber leaf spring segments, and a local coordinate system is established for each fiber leaf spring segment. The ply base surface of each fiber leaf spring is determined, and the corresponding fiber leaf spring is meshed based on the ply base surface of each fiber leaf spring, wherein the normal direction of each mesh is along the preset ply direction; According to the preset layup parameter table, the grid within the length range of each fiber layup layer is established as a Set of cells, and the material properties and laminate properties of each fiber layup layer are determined. The fiber layups are stacked according to the material properties of each fiber layup layer and the laminate properties to obtain a composite material laminate. The stacking direction of the composite laminate is determined, and the composite laminate is stacked according to the stacking direction to obtain a simulation model of each fiber leaf spring. A simulation model of the transverse double-leaf continuous fiber leaf spring is established based on the simulation model of each fiber leaf spring and the second connection relationship. A simulation model of the suspension system is established based on the simulation model of the transverse double-leaf continuous fiber leaf spring and the first connection relationship. Strength tests are performed on the simulation model of the suspension system to obtain strength simulation results.

2. The method according to claim 1, characterized in that, The local coordinate system of each fiber leaf spring segment includes: For the straight sections of the fiber leaf spring, a rectangular coordinate system is used to establish a local coordinate system, while for the curved sections, a cylindrical coordinate system is used to establish a local coordinate system.

3. The method according to claim 1, characterized in that, The strength test of the simulation model of the suspension system to obtain the strength simulation results includes: A load is applied at the steering knuckle center position of the suspension system, and the strength values ​​of the transverse double continuous fiber leaf spring under various load conditions are calculated. The strength simulation results are obtained based on the strength values ​​of the transverse double continuous fiber leaf spring under the various load conditions.

4. The method according to claim 3, characterized in that, The load conditions include at least one of the following: vertical impact condition, extreme turning condition, emergency braking condition, torsional condition, and curb impact condition.

5. A strength simulation device for a transversely placed double-leaf continuous fiber spring, characterized in that, include: An import module is used to import a suspension system geometric model, wherein the suspension system geometric model includes a transverse double-leaf continuous fiber spring; The determination module is used to determine the first connection relationship of the geometric model of the suspension system and the second connection relationship of the transverse double-leaf continuous fiber spring. The cutting module is used to cut the transverse double continuous fiber leaf spring into multiple fiber leaf spring segments according to a preset layup information table, and to establish a local coordinate system for each fiber leaf spring segment. The mesh generation module is used to determine the ply base surface of each fiber leaf spring and to perform mesh generation on the corresponding fiber leaf spring based on the ply base surface of each fiber leaf spring, wherein the normal direction of each mesh is along a preset ply direction. The composite module is used to establish a set of cells within the length range of each fiber layup according to a preset layup parameter table, determine the material properties and laminate properties of each fiber layup, and stack the fiber layups according to the material properties and laminate properties of each fiber layup to obtain a composite material laminate. The simulation module is used to determine the stacking direction of the composite laminates, stack the composite laminates according to the stacking direction to obtain a simulation model of each fiber leaf spring, establish a simulation model of the transverse double-leaf continuous fiber leaf spring according to the simulation model of each fiber leaf spring and the second connection relationship, establish a simulation model of the suspension system according to the simulation model of the transverse double-leaf continuous fiber leaf spring and the first connection relationship, and perform strength testing on the simulation model of the suspension system to obtain strength simulation results.

6. The apparatus according to claim 5, characterized in that, The cutting module includes: For the straight sections of the fiber leaf spring, a rectangular coordinate system is used to establish a local coordinate system, while for the curved sections, a cylindrical coordinate system is used to establish a local coordinate system.

7. The apparatus according to claim 5, characterized in that, The simulation module includes: The testing unit is used to apply a load to the steering knuckle center position of the suspension system, calculate the strength value of the transverse double continuous fiber leaf spring under various load conditions, and obtain the strength simulation result based on the strength value of the transverse double continuous fiber leaf spring under the various load conditions.

8. The apparatus according to claim 7, characterized in that, The load conditions include at least one of the following: vertical impact condition, extreme turning condition, emergency braking condition, torsional condition, and curb impact condition.

9. An electronic device, characterized in that, include: The memory, the processor, and the computer program stored in the memory and executable on the processor, the processor executing the program to implement the strength simulation method for a transverse double-leaf continuous fiber spring as described in any one of claims 1-4.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, The program is executed by the processor to implement the strength simulation method for a transverse double-sheet continuous fiber leaf spring as described in any one of claims 1-5.

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