Simulation method applied to metal wire mesh surface screen wheel of lunar rover

Abstract

The invention belongs to the technical field of lunar surface exploration simulation analysis, and particularly relates to a simulation method applied to a lunar rover wire mesh surface screen wheel, which comprises the following steps of: 1) establishing a three-dimensional model of the screen wheel, and performing grid division on the three-dimensional model of the screen wheel; a certain metal wire beam unit model in the screen wheel is constructed; 2) performing circumferential array and mirroring operation on the metal wire beam unit model, and completing building of finite element models of all metal wire beam units of the metal wire mesh surface; an integral beam unit metal wire mesh surface is formed by adopting a common node mode; 3) establishing a lunar soil pavement model according to a discrete element method; setting parameters of the metal wire mesh surface screen wheel of the lunar rover are combined to build a dynamic simulation model when the metal wire mesh surface screen wheel moves on the lunar surface so as to simulate the shearing process of the screen wheel to lunar soil. According to the method, the metal wire mesh surface of the screen wheel can be accurately simulated, compared with a conventional method, the number of calculation grid units is reduced, and the budgeting rate and the simulation accuracy are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of lunar exploration simulation analysis, and more specifically, it is a simulation method applied to the wire mesh surface screen wheel of a lunar rover. Background Art

[0002] The environmental conditions on the lunar surface are extremely harsh, with a day-night temperature difference of up to 300°C, and it is subject to strong solar and cosmic particle radiation due to its high-vacuum atmospheric environment. Therefore, the pneumatic tires installed on ground vehicles cannot adapt to this environment. Internationally, lunar wheels in the form of wire mesh surface screen wheels are mostly used for lunar rovers. The tread of the elastic screen wheel bears the load through the wire mesh surface to achieve a better vibration damping effect. The elastic screen wheel tread of the elastic screen wheel can play a role similar to that of an inflated expansion wheel and has good vibration absorption performance. Therefore, the lightweight, strong load-bearing capacity, and good vibration absorption performance of the metal elastic screen wheel will surely become the focus of lunar exploration research.

[0003] Whether the screen wheel can ensure good passing performance in the lunar environment is the key to the smooth exploration of the lunar mobile platform on the moon. Since it is difficult to simulate the lunar gravity environment experiment environment on the earth, the motion prediction in space is mainly verified through the method of motion simulation. At present, for the simulation of the screen wheel-lunar soil wheel-soil dynamics model, the method of coupling finite element and discrete element simulation is mostly used. With the in-depth development of lunar exploration missions, the research on the passing performance of wire elastic screen wheels will surely become a hot topic in lunar exploration. At present, the simulation methods mostly focus on simplifying or ignoring the wire mesh screen, and the mechanical action of the screen on the soil is equivalent by increasing the friction coefficient, which cannot simulate the shearing action of the wire wheel mesh on the lunar soil. Especially with the development and application of elastic screen wheels, building an accurate finite element model of the wire wheel mesh and accurately simulating the shearing force process of the screen wheel wire wheel mesh on the lunar soil will surely be the key and difficulty of the screen wheel-wheel soil numerical simulation. Therefore, proposing an accurate screen wheel mesh modeling method and constructing an accurate screen wheel-lunar soil wheel-soil dynamics simulation model are the key technologies to be solved in this application. By building an accurate simulation model to study the variation law of the passing performance parameters of the screen wheel in the lunar environment, more reliable opinions can be provided for the structural optimization of the screen wheel. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a simulation method applied to the wire mesh surface screen wheel of a lunar rover, which truly simulates the contact process between the wire mesh surface of the screen wheel and lunar soil particles, so as to explore the variation law of the passing performance parameters of the screen wheel, and serve as an important design index and optimization goal for the design of the screen wheel.

[0005] The technical solution adopted by the present invention to achieve the above purpose is: a simulation method applied to the wire mesh surface screen wheel of a lunar rover, including the following steps:

[0006] 1) Establish a 3D model of the screen wheel, set the beam element type and section parameters, and mesh the 3D model of the screen wheel; and construct a beam element model of a certain wire in the screen wheel.

[0007] 2) Perform circular array and mirror operations on the beam element model of this wire in step 1) to complete the construction of the finite element model of all wire beam elements on the wire mesh surface; and connect all wire beam element models in a co - node manner to form an overall beam element wire mesh surface.

[0008] 3) Establish a lunar soil road surface model according to the discrete element method; and combine the setting parameters of the wire mesh surface screen wheel of the lunar rover to build a dynamic simulation model of the wire mesh surface screen wheel during lunar movement to simulate the shearing process of the screen wheel on the lunar soil.

[0009] The 3D model of the screen wheel is a symmetric rotary mechanism, including: a combined hub, an internal spring limiter, a wire mesh surface, and herringbone pieces.

[0010] Among them, the wire mesh surface and the herringbone pieces are used to directly contact the constructed lunar soil road surface model.

[0011] In step 1), the establishment of the 3D model of the screen wheel is specifically as follows:

[0012] Import the combined hub, internal spring limiter, wire screen wheel, and herringbone pieces into 3D modeling software for combination, and draw the wheel mesh of the wire screen wheel. Take the intersection points of the mid - lines of the wheel mesh as the starting and ending points of the beam elements in the subsequent finite element model, and construct the 3D model of the screen wheel through 3D modeling software.

[0013] In step 1), the meshing of the 3D model of the screen wheel and the construction of a beam element model of a certain wire in the screen wheel are specifically as follows:

[0014] 1 - 1) Mesh the other structures except the wire mesh surface with tetrahedral meshes after importing the 3D model.

[0015] 1 - 2) The wire mesh surface is built by beam elements; select a wire model in the screen surface, connect all the preset nodes of this wire in sequence from start to end with the set beam elements, and complete the establishment of the finite element model of a wire beam element of the wheel mesh based on the micro - element method.

[0016] In step 2), the circular array and mirror operations on the beam element model of this wire in step 1) to complete the construction of the finite element model of all wire beam elements on the wire mesh surface are specifically as follows:

[0017] 2-1) The finite element model of a single wire beam unit that has been built is circularly arrayed with the wheel center as the center to complete the construction of the finite element models of all wire beam units in the 45° direction.

[0018] 2-2) Using the vertical mid-plane of the screen wheel as the reference plane, mirror all the finite element models of the wire beam units in the 45° direction to complete the construction of the finite element models of all wire beam units in the -45° direction; the construction of the finite element models of all the intersecting wires on the wire mesh surface is completed.

[0019] In step 2), connecting all the wire beam unit models in a co-node manner is specifically as follows:

[0020] Taking the endpoints of the wire beam units as the nodes for simulating the interweaving of wires, merging the nodes set within a range of 0.1 mm, and merging the nodes that are close to coincidence among these preset nodes, so that the wheel net composed of beam units has the overall force-bearing effect of metal weaving.

[0021] In step 3), establishing the lunar soil road surface model according to the discrete element method is specifically as follows:

[0022] Through the discrete elements generated to simulate lunar soil particles, perform self-weight compaction operations on the simulated lunar soil particles in the lunar surface environment. By setting the gravity environment in the self-weight compaction operation to simulate the natural deposition of discrete element particles of lunar soil, the simulation model truly simulates the stacking state of simulated lunar soil particles in the lunar surface environment.

[0023] To eliminate the influence of boundary effects, set the discrete lunar surface model to a non-reflective boundary state to make the established discrete element simulation model of the lunar soil road surface more accurate.

[0024] The steps for building the dynamic simulation model of the wire mesh surface screen wheel moving on the lunar surface include the following:

[0025] Couple the lunar soil road surface model with the finite element model of the screen wheel:

[0026] (1) Set the wire mesh surface as a beam unit, the herringbone pieces and elastic limiters as shell units, and the combined hub as a solid unit;

[0027] (2) Define the constraints, only release the displacement constraints in the wheel forward direction and the wheel gravity direction, and only release the rotational constraint in the wheel rotation direction to ensure the smooth travel of the screen wheel on the discrete lunar surface;

[0028] (3) Set the material parameters of the beam unit mesh surface, and set the contact friction parameters between the beam unit wire mesh surface and the lunar soil particles;

[0029] (4) A revolute pair is set at the center of the hub of the screen wheel to connect the components of the screen wheel, and the rotation speed of the screen wheel and the working condition parameters are set.

[0030] (5) The simulation model of the contact between the wire mesh surface screen wheel and the lunar soil in the lunar environment is built, and the solution is carried out through simulation software to obtain the simulation results, realizing the simulation of the shearing process of the screen wheel on the lunar soil.

[0031] The contact friction parameters of the lunar soil particles are as follows: the particle size range of the lunar soil particles is 1 - 3 mm.

[0032] The working condition parameters include: wheel rotation speed, axial load, gravitational acceleration, material property, thickness property, cross-section property.

[0033] The present invention has the following beneficial effects and advantages:

[0034] 1. The present invention proposes a simulation method for building the wire mesh surface of the screen wheel by using the co-node method of beam elements, providing an important reference for the passing performance of the screen wheel on the moon.

[0035] 2. The method proposed by the present invention can realize the shearing contact process of the wire mesh surface of the screen wheel on discrete lunar soil particles, and can simulate the contact force situation between the wire mesh surface and the lunar soil particles.

[0036] 3. The present invention simulates the driving process of the screen wheel on the lunar soil road surface in the low-gravity environment on the moon, improving the reliability of the machine and ensuring the completion of the task.

[0037] 4. The present invention can accurately simulate the wire mesh surface of the screen wheel, reducing the number of calculation grid elements compared with the conventional method, and improving the calculation speed and simulation accuracy.

[0038] 5. The present invention simulates the driving process of the screen wheel in the lunar environment on the moon, truly restoring the contact process between the wire mesh surface of the screen wheel and the lunar soil particles, and exploring the variation law of the passing performance parameters of the screen wheel during driving on the moon. Description of the Drawings

[0039] Figure 1 is the flowchart of the method of the present invention;

[0040] Figure 2 is the isometric structural schematic diagram of the three-dimensional geometric model of the wire mesh surface screen wheel of the present invention;

[0041] Figure 3 is the finite element model of the wire mesh surface screen wheel of the present invention;

[0042] Figure 4 is the shearing contact force between the beam element mesh surface of the screen wheel of the present invention and the simulated lunar soil particles;

[0043] Among them, 1 is the wire mesh surface, 2 is the combined hub, 3 is the herringbone piece, 4 is the elastic limiter, 5 is the simulated lunar regolith road surface, and 6 is the wheel rotating pair. Specific implementation manner

[0044] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0045] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the specific implementation manners of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the invention. Therefore, the present invention is not limited by the specific implementations disclosed below.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0047] As Figure 1 shown, it is the method flow chart of the present invention; a simulation method for a wire mesh surface screening wheel of a lunar rover according to the present invention includes the following steps:

[0048] 1) Establish a three-dimensional model of the screening wheel, import the three-dimensional model into HYPERMESH for mesh generation and initial settings, set the cross-section type and cross-section parameters of the wire mesh surface of the wheel, and perform mesh generation on the three-dimensional model of the screening wheel; and construct a single wire beam element model in the screening wheel.

[0049] 2) Perform circular array and mirror operations on the single wire beam element model in step 1) to complete the construction of the finite element model of all wire beam elements on the wire mesh surface; and connect all wire beam element models in a co-node manner to form an overall beam element wire mesh surface.

[0050] 3) Import the finite element model into the discrete element solver software LSDSYNA, and set the beam element mesh surface parameters and the contact parameters between the beam element wire mesh surface and the lunar regolith particles. Establish a lunar regolith road surface model according to the discrete element method; and build a dynamic simulation model of the wire mesh surface screening wheel during lunar surface movement in combination with the setting parameters of the wire mesh surface screening wheel of the lunar rover to simulate the shearing process of the screening wheel on the lunar regolith.

[0051] As Figure 2 shown, it is the isometric structural schematic diagram of the three-dimensional geometric model of the wire mesh surface screening wheel of the present invention; establishing a three-dimensional model of the screening wheel specifically includes:

[0052] Import the combined hub, internal spring restrictor, wire mesh wheel, and herringbone pieces into 3D modeling software for combination, and draw the wire mesh of the wire mesh wheel. Take the intersection points of the center line of the wire mesh and the lines as the starting and ending points of the beam elements in the subsequent finite element model, and construct the 3D model of the wire mesh wheel through the 3D modeling software.

[0053] Among them, the 3D model of the wire mesh wheel is a symmetric rotary mechanism, including: a combined hub, an internal spring restrictor, a wire mesh surface, and herringbone pieces; the wire mesh surface and herringbone pieces are used to directly contact the constructed lunar soil road surface model.

[0054] As Figure 3 shown, it is the finite element model of the wire mesh wheel with a wire mesh surface of the present invention, and its establishment method is as follows:

[0055] I) Mesh the 3D model of the wire mesh wheel and construct a certain wire beam element model in the wire mesh wheel, specifically:

[0056] Simplify the model of the wire mesh wheel, simplify the wire mesh surface into a beam element mesh, and simplify both the herringbone pieces and the elastic restrictor into shell element meshes, and then mesh. Set the cross-section type and cross-section parameters of the wire mesh surface of the wheel in the BEAMSECTION COLLECTORS in the material properties of HYPERMESH.

[0057] Select the preset nodes on the wire model in the wire mesh surface and connect the head and tail of the beam elements created by the BARS command in sequence. Perform circular array and mirror operations on this through ROTATE and REFLECT to complete the construction of all wire beam element models of the wire mesh surface. Merge the preset nodes through FACES_EQUIVALENCE to complete the construction of the overall beam element wire mesh surface.

[0058] 1-1) Import other structures except the wire mesh surface using a 3D model and then perform tetrahedral meshing;

[0059] 1-2) The wire mesh surface is constructed by beam elements; select a certain wire model in the wire mesh surface, connect the head and tail of all preset nodes of this wire using the set beam elements in sequence, and complete the establishment of the finite element model of a wire beam element of the wire mesh based on the microelement method.

[0060] II) Perform circular array and mirror operations on this wire beam element model to complete the construction of all wire beam element finite element models of the wire mesh surface, specifically:

[0061] 2-1) Perform a circular array of the constructed finite element model of a wire beam element with the wheel center as the center to complete the construction of the finite element models of all wire beam elements in the 45° direction;

[0062] 2-2) Taking the vertical middle plane of the screen wheel as the reference plane, mirror all the finite element models of the wire beam elements in the 45° direction to complete the construction of all the finite element models of the wire beam elements in the -45° direction; the construction of all the finite element models of the wires that intersect with each other on the wire mesh surface is completed.

[0063] III) Connect all the wire beam element models by the co-node method, specifically:

[0064] Taking the endpoints of the wire beam elements as the nodes for simulating the interweaving of wires, by merging the nodes set within 0.1 mm and merging the nodes that are close to coincidence among these preset nodes, so that the wheel net composed of beam elements has the overall stress effect of metal weaving. The final rendered model effect diagram is as Figure 3 shown;

[0065] as Figure 4 shown, which is the shear contact force of the beam element mesh surface of the screen wheel of the present invention and the simulated lunar soil particles; the present invention establishes a lunar soil road surface model according to the discrete element method, specifically:

[0066] Through the generated discrete elements of the simulated lunar soil particles, perform self-weight compaction operation on the simulated lunar soil particles in the lunar surface environment, and simulate the natural deposition of the discrete element particles of the lunar soil by setting the gravity environment in the self-weight compaction operation, so that the simulation model truly simulates the accumulation state of the simulated lunar soil particles in the lunar surface environment;

[0067] To eliminate the influence of boundary effects, set the discrete lunar surface model to a non-reflective boundary state, so that the established discrete element simulation model of the lunar soil road surface is more accurate.

[0068] Among them, building a dynamic simulation model of the wire mesh screen wheel moving on the lunar surface includes the following steps: coupling the lunar soil road surface model with the finite element model of the screen wheel:

[0069] (1) Set the wire mesh surface as beam elements, the herringbone pieces and elastic limiters as shell elements, and the combined hub as solid elements;

[0070] (2) Define the constraints, only release the displacement constraints in the wheel forward direction and the wheel gravity direction, and only release the rotational constraint in the wheel rotation direction to ensure that the screen wheel can travel smoothly on the discrete lunar surface;

[0071] (3) Set the material parameters of the beam element mesh surface, and set the contact friction parameters between the beam element wire mesh surface and the lunar soil particles;

[0072] The contact friction parameters of the lunar soil particles are: the particle size range of the lunar soil particles is 1 - 3 mm;

[0073] (4) A rotating pair is set at the center of the hub of the screen wheel to connect the various components of the screen wheel, and the rotation speed and working condition parameters of the screen wheel are set.

[0074] The working condition parameters include: wheel speed, axle load, gravitational acceleration, material properties, thickness properties, and cross-sectional properties.

[0075] (5) Complete the construction of the wheel-soil contact simulation model of the wire mesh surface screen wheel in the lunar environment, and solve it through simulation software to obtain the simulation results, realizing the simulation of the shearing process of the screen wheel on lunar soil.

[0076] (6) After completing the construction of the wheel-soil contact simulation model of the wire mesh surface screen wheel in the lunar environment, for the simulation of the shearing of the screen wheel on lunar soil, the specific steps are as follows:

[0077] In this example, the simulated soil material is lunar soil, and the gravitational environment is 1 / 6g. The LSDYNA software is used to simulate the movement process of the screen wheel on the discrete lunar surface and solve the passability parameters. Among them, the combined hub and the restrictor are set as rigid bodies, and the beam element mesh surface and the herringbone pieces are set as flexible bodies. The keyword *CONSTRAINED_EXTRA_NODES_SET is used for connection. 5 is the discrete element simulation of the lunar soil road surface.

[0078] For the establishment of the soil model in the sampling area, the DEM discrete element model is adopted. The particle size of the DEM model is set as particles randomly distributed with a diameter of 1-3 mm. The material uses the built-in soil material model *MAT_SOLD_AND_FOAM in LSDYNA. The set material parameters include density, shear modulus, and Poisson's ratio, etc. The keyword *CONTROL_DISCRETE_ELEMENT is used to define the stiffness coefficient, friction coefficient, damping coefficient, etc. between particles. The above parameters can be obtained through methods such as querying the instruction manual and instrument measurement. For the boundary conditions of the soil model, the non-reflective boundary condition is adopted, and this method can simulate the analysis situation of the infinite domain of the soil.

[0079] Among them, 6 is the wheel rotating pair. A wheel rotating pair 6 is established at the wheel center position to measure the torque required for the wheel to travel during the contact process between the beam element mesh surface of the screen wheel and the lunar soil particles. The cross-sectional type and cross-sectional size of the beam element in the wire mesh surface are set in the keyword *SECTION_BEAM; the contact parameters between the beam element wire mesh surface 1 and the simulated lunar soil particles 5 are set in the keyword *DEFINE_DE_TO_BEAM_COUPLING.

[0080] The beam element mesh surface 1 and the combined hub 2 are connected through the keyword *CONSTRAINED_EXTRA_NODES_SET, a load is applied at the wheel center, and the rotation speed of the screen wheel is set. Finally, the relevant output options are set, and the simulation solution is carried out in LSDYNA.

[0081] The above are only the embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, expansions, etc. made within the spirit and principle of the present invention are all included in the protection scope of the present invention.

Claims

1. A simulation method for a wire mesh surface sieve wheel applied to a lunar rover, characterized in that, The steps include: 1) Establish a 3D model of the screen wheel, set the beam element type and section parameters, and mesh the 3D model of the screen wheel; and construct a finite element model of a certain wire beam in the screen wheel. 2) Perform circular array and mirror operations on the wire beam element model in step 1) to complete the construction of the finite element models of all wire beam elements on the wire mesh surface; and connect all wire beam element models in a co-node manner to form an overall beam element wire mesh surface. 3) Establish a lunar soil road surface model according to the discrete element method; and combined with the setting parameters of the wire mesh surface screen wheel of the lunar rover, build a dynamic simulation model of the wire mesh surface screen wheel during movement on the lunar surface to simulate the shearing process of the screen wheel on the lunar soil.

2. The simulation method for a wire mesh surface sieve wheel applied to a lunar rover according to claim 1, wherein, The 3D model of the screen wheel is a symmetric rotary mechanism, including: a combined hub, an internal spring limiter, a wire mesh surface, and herringbone pieces. Among them, the wire mesh surface and herringbone pieces are used to directly contact the constructed lunar soil road surface model.

3. The simulation method of a wire mesh surface sieve wheel applied to a lunar rover according to claim 1, characterized in that, In step 1), the establishment of the 3D model of the screen wheel is specifically as follows: Import the combined hub, internal spring limiter, wire screen wheel, and herringbone pieces into a 3D modeling software for combination, and draw the wheel mesh of the wire screen wheel. Take the intersection points of the midlines of the wheel mesh as the starting and ending points of the beam elements in the subsequent finite element model, and construct the 3D model of the screen wheel through the 3D modeling software.

4. The simulation method for a wire mesh surface sieve wheel applied to a lunar rover according to claim 1, wherein In step 1), the meshing of the 3D model of the screen wheel and the construction of a finite element model of a certain wire beam in the screen wheel are specifically as follows: 1-1) Mesh the other structures except the wire mesh surface with a tetrahedral mesh after importing the 3D model. 1-2) The wire mesh surface is built by beam elements; select a certain wire model in the screen surface, connect the preset nodes of this wire in sequence from beginning to end with the set beam elements, and complete the establishment of the finite element model of a wire beam element of the wheel mesh based on the microelement method.

5. The simulation method of a wire mesh surface sieve wheel applied to a lunar rover according to claim 1, characterized in that, In step 2), the circular array and mirror operations on the wire beam element model in step 1) to complete the construction of the finite element models of all wire beam elements on the wire mesh surface are specifically as follows: 2-1) Perform a circular array of the completed finite element model of a wire beam element with the wheel center as the center to complete the construction of the finite element models of all wire beam elements in the 45° direction. 2-2) Take the vertical mid-plane of the screen wheel as the reference plane and perform mirror processing on all the finite element models of the wire beam elements in the 45° direction to complete the construction of the finite element models of all wire beam elements in the -45° direction; the construction of the finite element models of all the intersecting wires on the wire mesh surface is completed.

6. The simulation method for a wire mesh surface sieve wheel applied to a lunar rover according to claim 1, characterized in that, In step 2), the connection of all wire beam element models in a co-node manner is specifically as follows: Take the endpoints of the wire beam elements as the nodes simulating the interweaving of the wires, and by merging the nodes within a range of 0.1 mm, merge the nodes that are close to coincidence among these preset nodes, so that the wheel mesh composed of beam elements has the overall stress effect of metal weaving.

7. A simulation method for a metal wire mesh surface sieve wheel applied to a lunar rover according to claim 1, characterized in that In step 3), the establishment of the lunar soil road surface model according to the discrete element method is specifically as follows: Through the discrete elements of the generated simulated lunar soil particles, the simulated lunar soil particles are subjected to self-weight compaction operation in the lunar surface environment. By setting the gravity environment in the self-weight compaction operation to simulate the natural deposition of the discrete element particles of lunar soil, the simulation model truly simulates the accumulation state of the simulated lunar soil particles in the lunar surface environment; To eliminate the influence of boundary effects, the discrete lunar surface model is set to a non-reflective boundary state to make the established discrete element simulation model of the lunar soil road surface more accurate.

8. The simulation method of a wire mesh surface sieve wheel applied to a lunar rover according to claim 1, characterized in that, The steps for building the dynamic simulation model of the wire mesh surface sieve wheel moving on the lunar surface are as follows: Couple the lunar soil road surface model with the finite element model of the sieve wheel: (1) Set the wire mesh surface as a beam element, the herringbone pieces and the elastic restrictor as shell elements, and the combined hub as a solid element; (2) Define the constraints, only release the displacement constraints in the wheel forward direction and the wheel gravity direction, and only release the rotational constraint in the wheel rotation direction to ensure the smooth driving of the sieve wheel on the discrete lunar surface; (3) Set the material parameters of the beam element wire mesh surface and the contact friction parameters between the beam element wire mesh surface and the lunar soil particles; (4) Set a revolute pair at the center of the sieve wheel hub to connect the various components of the sieve wheel, and set the rotation speed and working condition parameters of the sieve wheel; (5) Complete the construction of the wheel-soil contact simulation model of the wire mesh surface sieve wheel in the lunar surface environment, and solve it through simulation software to obtain the simulation results, realizing the simulation of the shear process of the sieve wheel on the lunar soil.

9. The simulation method of a wire mesh surface sieve wheel applied to a lunar rover according to claim 8, characterized in that The lunar soil particle contact friction parameters are: the particle size range of the lunar soil particles is 1-3 mm; The working condition parameters include: wheel rotation speed, axle load, gravitational acceleration, material properties, thickness properties, cross-section properties.

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