Simulation analysis method for shape memory alloy heat engine

Abstract

The invention discloses a simulation analysis method for a shape memory alloy heat engine, which comprises the following steps of: performing kinematics simulation analysis on the shape memory alloy heat engine through motion analysis software, and modeling to obtain a three-dimensional structure model; analyzing the three-dimensional structure model through a finite element 3D transient analysis method to obtain a permanent magnet torque curve graph; performing a thermal deformation experiment on the three-dimensional structure model to generate a force and displacement function relational expression of the shape memory alloy spring; a virtual prototype is constructed, simulation analysis is conducted on the virtual prototype through a multi-body dynamics analysis method, and therefore three-dimensional structure model optimization design is conducted; and performing simulation analysis on the virtual prototype through a static analysis method of a finite element so as to verify the strength and the stability of the three-dimensional structure model. Therefore, the problems of long development period and high cost due to the fact that only dynamic formula derivation or MATLAB simulation is relied on in related technologies, theoretical simulation of an actual working environment is difficult to be substituted, and even a real object needs to be directly manufactured are solved.

Description

Technical Field

[0001] The invention relates to the technical field of energy conversion, and in particular to a simulation analysis method for a shape memory alloy heat engine. Background Art

[0002] Shape memory alloy heat engine uses shape memory alloy as a material that can undergo reversible correlation under temperature changes, thereby realizing the conversion of thermal energy. As a sustainable energy solution, waste heat recovery technology has received widespread attention from scientific researchers and the industrial community. In terms of waste heat recovery and utilization, shape memory alloy heat engines show good application prospects. For example, the patent document with application number 202410655374.0 discloses a shape memory alloy waste heat conversion device, which drives one end of the cable assembly to move along the deformation direction of the shape memory alloy when the shape memory alloy is deformed by heat, and drives the rotating mechanism to rotate around the rotating shaft. When the rotating mechanism rotates close to the permanent magnet, the permanent magnet provides repulsive force to the rotating mechanism in the opposite direction to convert thermal energy into mechanical energy.

[0003] At present, most simulations of shape memory alloy heat engines use the derivation of dynamic formulas or MATLAB simulations, which are theoretical simulations that cannot be substituted into actual working environment conditions. Sometimes, it is even necessary to verify directly by making a physical object.

[0004] Whether in terms of development time or cost, it takes a long time and costs a lot, which is not conducive to product development and feasibility demonstration in the early stage of development. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a simulation analysis method for a shape memory alloy thermal engine that can shorten the development cycle and reduce the R&D cost.

[0006] The technical solution adopted by the present invention to solve the technical problem is:

[0007] A simulation analysis method for a shape memory alloy heat engine, the simulation analysis method comprising the following steps:

[0008] S1. Perform kinematic simulation analysis on the shape memory alloy heat engine through motion analysis software, and perform three-dimensional modeling to obtain a three-dimensional structural model;

[0009] S2. Analyze the three-dimensional structural model by 3D transient analysis method of finite element to obtain the permanent magnet torque curve;

[0010] S3. Generate a force-displacement function relationship of a shape memory alloy spring by performing a thermal deformation experiment on a three-dimensional structure model;

[0011] S4. Based on the permanent magnet torque curve and the functional relationship between force and displacement obtained in steps S2 and S3, a virtual prototype is constructed, a simulation analysis is performed on the virtual prototype using a multi-body dynamics analysis method, and an optimization design is performed on the three-dimensional structural model based on the simulation analysis results;

[0012] S5. The virtual prototype is simulated and analyzed by the finite element static analysis method to verify the strength and stability of the three-dimensional structural model.

[0013] In a preferred embodiment of the present invention, the step S1 includes performing kinematic simulation analysis on the permanent magnet drive mechanism, the shape memory alloy spring transmission mechanism and the base of the multi-shape memory alloy heat engine.

[0014] In a preferred embodiment of the present invention, in step S1, the motion analysis software is SOLIDWORKS; and step S1 further comprises the following steps:

[0015] S101. Use SOLIDWORKS to perform 3D modeling on the shape memory alloy thermal engine to obtain a 3D structural model;

[0016] The steps of 3D modeling include: designing the distribution positions of bearings and anchor points;

[0017] parameter values ​​for design density, Young's modulus, Poisson's ratio, center of mass, and moment of inertia;

[0018] Design kinematic pairs and their fit and constraint relationships;

[0019] The kinematic analysis of the permanent magnet drive mechanism, the shape memory alloy spring transmission mechanism and the base is performed to determine the relative movement trajectory of the permanent magnet drive mechanism and the shape memory alloy spring transmission mechanism.

[0020] In a preferred embodiment of the present invention, the step S1 further comprises the following steps:

[0021] S102. The rope used to connect the shape memory alloy spring in the shape memory alloy heat engine is modeled by the rope system of AdamsMachinery;

[0022] The modeling steps include: setting the connection components of the anchor points;

[0023] Set the pulley's width, depth, radius and angle properties;

[0024] Set contact parameters, including Hertz and friction coefficients;

[0025] Plan the layout parameters of the pulley, including the swing axis, position, diameter and Angular Mis-Alignment of the pulley;

[0026] Set the density, Young's modulus, and damping coefficient of the rope.

[0027] In a preferred embodiment of the present invention, in the step S2, a 3D transient analysis of the torque of the permanent magnet drive mechanism is performed using ANSYS Maxwell to simulate the interaction force generated between the large permanent magnet and the small permanent magnet when the small permanent magnet rotates, thereby obtaining a permanent magnet torque curve.

[0028] In a preferred embodiment of the present invention, in the step S3, it includes measuring the contraction force and displacement relationship generated by the two-way shape memory alloy spring after heating and then cooling, and then performing interpolation fitting calculations through MATLAB to generate a force and displacement function relationship of the shape memory alloy spring.

[0029] In a preferred embodiment of the present invention, the force and displacement function relationship of the memory alloy spring is:

[0030]

[0031] In a preferred embodiment of the present invention, in the step S4, the three-dimensional structural model, the permanent magnet torque curve diagram and the force-displacement function relationship of the shape memory alloy spring are exported to form a neutral file, and the gravity acceleration, material density, friction force and constraint relationship are set to construct a virtual prototype, which is then imported into the ADAMS multi-body dynamics analysis software for joint simulation analysis.

[0032] In a preferred embodiment of the present invention, the step S4 further comprises the following steps:

[0033] S401. Constructing a virtual prototype according to actual working conditions, including constructing a fixed pair, a moving pair, a rotating pair and a contact relationship, and the construction steps include:

[0034] A fixing pair is provided between one end of the shape memory alloy spring and the first supporting plate;

[0035] A moving pair is arranged between the other end of the shape memory alloy spring and the second supporting plate, and the friction coefficient is set to 0.2;

[0036] A rotating pair is arranged between the first support plate and the rotating rod, and the friction coefficient is set to 0.2;

[0037] Set entity-to-entity contact between the second support plate and the third support plate, with normal force as collision, stiffness as 1.0E+05, force index as 2.2, damping coefficient as 2.2, and penetration depth as 0.1 mm;

[0038] Let the gravitational acceleration in the system be 9806.65 mm / s 2 ;

[0039] S402. The main bearing of the virtual prototype is constructed using the bearing module in Adams Machinery, and the construction steps include:

[0040] Select a single row deep groove ball bearing (SKF 618 / 8), the bearing seat is ground in ADAMS, and the radial and axial constraints are set. The bearing clearance is C0, the radial and bending damping coefficients are 0.1, and the axial damping coefficient is 0.2.

[0041] In a preferred embodiment of the present invention, in step S5, ANSYS Workbench is used to perform static analysis on the virtual prototype to evaluate the deformation characteristics of the material under force and analyze the strain state under maximum stress to verify its strength and stability.

[0042] The beneficial effects of the present invention are: providing a simulation analysis method for shape memory alloy heat engines, solving the problem of long development cycle and cost caused by the derivation of dynamic formulas or theoretical simulation in MATLAB simulation that cannot be substituted into actual working environment conditions in related technologies. At the same time, the joint simulation analysis method estimates and accurately analyzes various data of actual operation by establishing a virtual prototype, and performs dynamic analysis, calculation and optimization design. This can shorten the development cycle and reduce R&D costs, and is conducive to future improvements and verifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a step diagram of the simulation analysis method for shape memory alloy heat engine of the present invention;

[0044] Figure 2 It is a schematic diagram of a three-dimensional structural model of a shape memory alloy heat engine in the present invention;

[0045] Figure 3 is a permanent magnet torque curve diagram of the present invention;

[0046] Figure 4 It is the magnetic induction intensity vector cloud diagram in the present invention;

[0047] Figure 5 It is the magnetic induction intensity amplitude cloud diagram of the present invention;

[0048] Figure 6 Schematic diagram of the displacement of the shape memory alloy on the left side of the shape memory alloy heat engine in the present invention;

[0049] Figure 7 Schematic diagram of the displacement of the shape memory alloy on the right side of the shape memory alloy heat engine in the present invention;

[0050] Figure 8 is a schematic diagram of the simulated torque drive of the virtual prototype in the present invention;

[0051] Fig. 9 It is a motion trajectory diagram of the transmission mechanism of the shape memory alloy heat engine in the present invention in the YZ plane;

[0052] Fig.10 It is a motion trajectory diagram of the anchor point 1 bound by the SMA in the X direction based on the rotation of the transmission mechanism of the shape memory alloy heat engine in the YZ plane in the present invention;

[0053] Fig.11 It is a motion trajectory diagram of the transmission mechanism of the shape memory alloy heat engine in the present invention in the YZ plane and in the XY plane (including the Z axis depth);

[0054] Fig.12 is a schematic diagram of the deformation of the transmission component under the maximum stress in the present invention;

[0055] Fig.13 It is a cloud diagram of the safety factor of the bearing seat under the maximum stress in the present invention.

[0056] Fig.14 is a schematic diagram of the deformation of the base under the maximum stress in the present invention;

[0057] Fig.15 It is a flow chart of the simulation analysis method for shape memory alloy thermal engine of the present invention.

[0058] In the figure: 1. permanent magnet driving mechanism; 2. shape memory alloy spring transmission mechanism; 3. base; 4. shape memory alloy spring; 5. first support plate; 6. second support plate; 7. third support plate. DETAILED DESCRIPTION

[0059] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings.

[0060] Reference Figures 1 to 15 , a simulation analysis method for a shape memory alloy heat engine, characterized in that the simulation analysis method comprises the following steps:

[0061] S1. Perform kinematic simulation analysis on the shape memory alloy heat engine through motion analysis software, and perform three-dimensional modeling to obtain a three-dimensional structural model;

[0062] S2. Analyze the three-dimensional structural model by 3D transient analysis method of finite element to obtain the permanent magnet torque curve;

[0063] S3. Generate a force-displacement function relationship of a shape memory alloy spring by performing a thermal deformation experiment on a three-dimensional structure model;

[0064] S4. Based on the permanent magnet torque curve and the functional relationship between force and displacement obtained in steps S2 and S3, a virtual prototype is constructed, a simulation analysis is performed on the virtual prototype using a multi-body dynamics analysis method, and an optimization design is performed on the three-dimensional structural model based on the simulation analysis results;

[0065] S5. The virtual prototype is simulated and analyzed by the finite element static analysis method to verify the strength and stability of the three-dimensional structural model.

[0066] Through the above steps, using the virtual prototype technology of joint simulation, various data of actual operation can be estimated and accurately analyzed, and dynamic analysis, calculation and optimization design can be performed. This simulation analysis method can shorten the development cycle and reduce R&D costs, and is conducive to future improvements and verifications. In addition, for most simulations of shape memory alloy heat engines, the derivation of dynamic formulas or MATLAB simulation is used, and these simulations are theoretical simulations that cannot be substituted into actual working environment conditions. Whether in terms of the time cycle of development or the cost, it takes a long time and cost. This is not conducive to the feasibility demonstration of product development and early development. The simulation analysis method of the shape memory alloy heat engine can effectively solve the problems in the prior art and achieve corresponding results.

[0067] In step S1 of this solution, kinematic simulation analysis is performed on the permanent magnet drive mechanism 1, the shape memory alloy spring transmission mechanism 2 and the base 3 of the multi-shape memory alloy heat engine, and three-dimensional modeling is performed by setting the size and structure according to the actual working conditions. At the same time, the kinematic analysis software is SOLIDWORKS; S1 also includes the following steps:

[0068] S101. Use SOLIDWORKS to perform 3D modeling on the shape memory alloy thermal engine to obtain a 3D structural model;

[0069] The steps of 3D modeling include: designing the distribution positions of bearings and anchor points;

[0070] parameter values ​​for design density, Young's modulus, Poisson's ratio, center of mass, and moment of inertia;

[0071] Design kinematic pairs and their fit and constraint relationships;

[0072] The kinematic analysis of the permanent magnet drive mechanism 1, the shape memory alloy spring transmission mechanism 2 and the base 3 is performed to determine the relative movement trajectory of the permanent magnet drive mechanism 1 and the shape memory alloy spring transmission mechanism 2. The permanent magnet drive mechanism 1 includes a shape memory alloy spring, a first support plate 5, a second support plate 6 and a third support plate 7.

[0073] After the 3D structural model is constructed, the design of the 3D structural model is verified and optimized through kinematic simulation to ensure the rationality of its operation. At the same time, it is exported as a neutral file for subsequent finite element analysis and virtual prototype simulation.

[0074] This scheme S1 also includes the following steps:

[0075] S102. The rope used to connect the shape memory alloy spring 4 in the shape memory alloy heat engine is modeled by the rope system of AdamsMachinery;

[0076] The modeling steps include: setting the connection components of the anchor points;

[0077] Set the pulley's width, depth, radius and angle properties;

[0078] Set contact parameters, including Hertz and friction coefficients;

[0079] Plan the layout parameters of the pulley, including the swing axis, position, diameter and Angular Mis-Alignment of the pulley;

[0080] Set the density, Young's modulus, and damping coefficient of the rope.

[0081] In step S2 of this solution, 3D transient analysis of the torque of the permanent magnet drive mechanism 1 is performed using ANSYS Maxwell to simulate the interaction force between the large permanent magnet and the small permanent magnet when the small permanent magnet rotates, thereby obtaining a permanent magnet torque curve.

[0082] The specific steps include: start ANSYS MAXWELL joint simulation through SOLIDWORKS to establish the model, assign material properties to the model, divide the mesh, apply boundary conditions, motion settings and transient solver parameters, and conduct feasibility checks; analyze and modify the model size according to the actual motion situation; set the Transient solution type in Maxwell 3D; the two groups of four permanent magnets are made of NdFe35 material; use the Cartesian coordinate system to create a Region with a Radius of 200mm and a Height of 150mm around the entire permanent magnet part; assign the Band to use the Rotation motion mode;

[0083] The analysis is set to analyze 1000 steps in one second; a feasibility check is performed, in which Excitations does not need to be set because it is a permanent magnet NdFe35 material; the permanent magnet mesh Set maximum element length is 10mm, the region mesh Maximum number of additional elements is 10000, and Slider 7 is used for the Band mesh.

[0084] Select B vector and Mag B for Fields analysis, as well as Torque Plot in Results, and then perform an overall solution analysis.

[0085] By observing B vector and Mag B, the model is further modified and improved to obtain a satisfactory permanent magnet torque curve; the permanent magnet torque curve is exported as a neutral file for joint simulation analysis.

[0086] In step S3 of this scheme, the contraction force and displacement relationship generated by the two-way shape memory alloy spring 4 after heating and cooling is measured, and then interpolation fitting calculation is performed through MATLAB to generate the force and displacement function relationship of the shape memory alloy spring. The force and displacement function relationship of the shape memory alloy spring is:

[0087]

[0088] In step S4 of this solution, the three-dimensional structural model, permanent magnet torque curve and functional relationship between force and displacement are exported to form a neutral file, and the gravity acceleration, material density, friction and constraint relationship are set to build a virtual prototype, which is then imported into ADAMS multi-body dynamics analysis software for joint simulation analysis.

[0089] S4 of this scheme also includes the following steps:

[0090] S401. Constructing a virtual prototype according to actual working conditions, including constructing a fixed pair, a moving pair, a rotating pair and a contact relationship, and the construction steps include:

[0091] A fixing pair is provided between one end of the shape memory alloy spring 4 and the first support plate 5;

[0092] A moving pair is provided between the other end of the shape memory alloy spring 4 and the second support plate 6, and the friction coefficient is set to 0.2;

[0093] A rotating pair is provided between the first support plate 5 and the rotating rod, and the friction coefficient is set to 0.2;

[0094] Set entity-to-entity contact between the second support plate 6 and the third support plate 7, with the normal force being collision, the stiffness being 1.0E+05, the force index being 2.2, the damping coefficient being 2.2, and the penetration depth being 0.1 mm;

[0095] Let the gravitational acceleration in the system be 9806.65 mm / s 2 ;

[0096] S402. The main bearing of the virtual prototype is constructed using the bearing module in Adams Machinery, and the construction steps include:

[0097] Select a single row deep groove ball bearing (SKF 618 / 8), the bearing seat is ground in ADAMS, and the radial and axial constraints are set. The bearing clearance is C0, the radial and bending damping coefficients are 0.1, and the axial damping coefficient is 0.2.

[0098] In this way, the force and displacement function relationship of the shape memory alloy spring is imported into ADAMS, the neutral file of the permanent magnet torque curve of Ansys Maxwell is imported into ADAMS, and the SPLINE curve and system unit variables are established using the ADAMS data unit; and the drive mode is set to force drive, and the torque is applied by calling the variables and SPLINE curve to perform joint simulation analysis. Finally, based on the permanent magnet torque curve, the force and displacement function relationship of the shape memory alloy spring, and the results of static analysis, the multi-body dynamics simulation analysis of the entire virtual prototype is performed. The optimization design is performed based on the results of the simulation analysis to obtain a reasonable three-dimensional structural model, thereby verifying its rationality and feasibility.

[0099] In step S5 of this solution, ANSYS Workbench is used to perform static analysis on the virtual prototype, evaluate the deformation characteristics of the material under force, and analyze the strain condition under maximum stress, so as to verify the strength and stability of the three-dimensional structural model.

[0100] Among them, ANSYS Workbench is mainly used to perform static analysis on the shape memory alloy spring transmission mechanism 2, focusing on the strain at key positions under maximum stress. And the material performance analysis of key components (such as bearings and transmission mechanisms) in the three-dimensional structural model is performed to verify their strength and stability under maximum load. If the simulation results show that the strain is too large or the structure is unreasonable, the design is adjusted in time. The following are the relevant simulation results:

[0101] like Fig.10Through static simulation analysis, it is found that the position with the largest deformation is the position where a 2N force is applied. Among them, red to blue is the distribution of deformation from large to small. As shown in the figure, the black wireframe is the initial position, and movement occurs after the force is applied. By observing the deformation effect based on the combined movement, it is found that the fixed rods of the four shape memory alloy springs 4 undergo a certain deformation during rotation, but the deformation is small and does not affect the actual movement.

[0102] like Fig.11 , under the maximum stress of 3.1N in the Y direction of the bearing seat, the safety factor analysis was carried out. The smaller the safety factor, the more dangerous it is, and the theoretical minimum value should be greater than 1. Civilian design is 1.2-2, while military or higher-level precision products may require at least 5. Under the stress in the Y direction and Z direction respectively, the safety factors of both are 15, which is much greater than 1, so it is very safe.

[0103] like Fig.12 , the simulation analysis of the base 3 was carried out, and it was found that the overall maximum deformation was 0.023mm under the maximum stress. This deformation size is very small and acceptable within the safety range. The final simulation results show that the optimized device structure can withstand the stress in actual operation and ensure safe operation.

[0104] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A simulation analysis method for shape memory alloy thermal engine, characterized in that: The simulation analysis method comprises the following steps: S1. Perform kinematic simulation analysis on the shape memory alloy heat engine through motion analysis software, and perform three-dimensional modeling to obtain a three-dimensional structural model; S2. Analyze the three-dimensional structural model by 3D transient analysis method of finite element to obtain the permanent magnet torque curve; S3. Generate a force-displacement function relationship of a shape memory alloy spring by performing a thermal deformation experiment on a three-dimensional structure model; S4. Based on the permanent magnet torque curve and the functional relationship between force and displacement obtained in steps S2 and S3, a virtual prototype is constructed, a simulation analysis is performed on the virtual prototype using a multi-body dynamics analysis method, and an optimization design is performed on the three-dimensional structural model based on the simulation analysis results; S5. The virtual prototype is simulated and analyzed by the finite element static analysis method to verify the strength and stability of the three-dimensional structural model.

2. The simulation analysis method for shape memory alloy heat engine according to claim 1, characterized in that: In the step S1, a kinematic simulation analysis is performed on the permanent magnet drive mechanism (1), the shape memory alloy spring transmission mechanism (2) and the base (3) of the multi-shape memory alloy heat engine.

3. The simulation analysis method for shape memory alloy heat engine according to claim 2, characterized in that: In the step S1, the motion analysis software is SOLIDWORKS; the step S1 further includes the following steps: S101. Use SOLIDWORKS to perform 3D modeling on the shape memory alloy thermal engine to obtain a 3D structural model; The steps of 3D modeling include: designing the distribution positions of bearings and anchor points; parameter values ​​for design density, Young's modulus, Poisson's ratio, center of mass, and moment of inertia; Design kinematic pairs and their fit and constraint relationships; A kinematic analysis is performed on the permanent magnet drive mechanism (1), the shape memory alloy spring transmission mechanism (2) and the base (3) to determine the relative movement trajectory of the permanent magnet drive mechanism (1) and the shape memory alloy spring transmission mechanism (2).

4. The simulation analysis method for shape memory alloy heat engine according to claim 2, characterized in that: The S1 further comprises the following steps: S102. The rope used to connect the shape memory alloy spring (4) in the shape memory alloy heat engine is modeled by the rope system of AdamsMachinery; The modeling steps include: setting the connection components of the anchor points; Set the pulley's width, depth, radius and angle properties; Set contact parameters, including Hertz and friction coefficients; Plan the layout parameters of the pulley, including the swing axis, position, diameter and Angular Mis-Alignment of the pulley; Set the density, Young's modulus, and damping coefficient of the rope.

5. The simulation analysis method for shape memory alloy heat engine according to claim 2, characterized in that: In step S2, 3D transient analysis is performed on the torque of the permanent magnet drive mechanism (1) by using ANSYS Maxwell to simulate the interaction force generated between the large permanent magnet and the small permanent magnet when the small permanent magnet rotates, thereby obtaining a permanent magnet torque curve.

6. The simulation analysis method for shape memory alloy heat engine according to claim 1, characterized in that: In the step S3, the contraction force and displacement relationship generated by the two-way shape memory alloy spring (4) after heating and cooling is measured, and then interpolation fitting calculation is performed through MATLAB to generate a force and displacement function relationship of the shape memory alloy spring.

7. The simulation analysis method for shape memory alloy heat engine according to claim 6, characterized in that: The force and displacement function relationship of the memory alloy spring is:

8. The simulation analysis method for shape memory alloy heat engine according to claim 1, characterized in that: In the S4 step, the three-dimensional structural model, the permanent magnet torque curve and the force-displacement function relationship of the shape memory alloy spring are exported to form a neutral file, and the gravity acceleration, material density, friction and constraint relationship are set to build a virtual prototype, which is then imported into the ADAMS multi-body dynamics analysis software for joint simulation analysis.

9. The simulation analysis method for shape memory alloy heat engine according to claim 8, characterized in that: The S4 also includes the following steps: S401. Constructing a virtual prototype according to actual working conditions, including constructing a fixed pair, a moving pair, a rotating pair and a contact relationship, and the construction steps include: A fixing pair is provided between one end of the shape memory alloy spring (4) and the first support plate (5); A moving pair is arranged between the other end of the shape memory alloy spring (4) and the second support plate (6), and the friction coefficient is set to 0.2; A rotating pair is arranged between the first support plate (5) and the rotating rod, and the friction coefficient is set to 0.2; Setting entity-to-entity contact between the second support plate (6) and the third support plate (7), with the normal force being collision, the stiffness being 1.0E+05, the force index being 2.2, the damping coefficient being 2.2, and the penetration depth being 0.1 mm; Let the gravitational acceleration in the system be 9806.65 mm / s 2 ; S402. The main bearing of the virtual prototype is constructed using the bearing module in Adams Machinery, and the construction steps include: Select a single-row deep groove ball bearing (SKF 618 / 8), the bearing seat is ground in ADAMS, and the radial and axial constraints are set. The bearing clearance is C0, the radial and bending damping coefficients are 0.1, and the axial damping coefficient is 0.

2.

10. The simulation analysis method for shape memory alloy heat engine according to claim 1, characterized in that: In the step S5, ANSYS Workbench is used to perform static analysis on the virtual prototype to evaluate the deformation characteristics of the material under force and analyze the strain state under maximum stress to verify its strength and stability.

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