Simulation analysis method of bidirectional oil-gas mixing buffer based on AMESim
By establishing a three-dimensional model and simulation model of oil and gas hybrid buffer in AMESim simulation software, the problem of inaccurate modeling in landing gear buffer performance simulation calculation is solved, and higher simulation accuracy and R&D efficiency are achieved.
Patent Information
- Application Number
- CN202411867483.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-05-06
AI Technical Summary
In the simulation calculation of landing gear buffer performance, it is difficult to accurately model the oil and gas hybrid buffer, resulting in poor simulation accuracy and affecting the dynamic simulation accuracy of the actual buffer.
Using the simulation analysis method of bidirectional oil and gas mixing buffer based on AMESim, a three-dimensional model of the oil and gas mixing buffer is established, and a simulation model is created in the AMESim simulation software. The Submodel mode and Premier submodel functions are used to model and simulate the stretching and compression processes separately.
It effectively solves the problem of setting buffer performance parameters of oil and gas hybrid buffers, improves R&D efficiency, reduces R&D costs, and is of great significance to the optimized design of buffers.
Smart Images
Figure CN119940185A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of aviation landing gear, in particular to a simulation analysis method of a bidirectional oil-gas mixed buffer based on AMESim. Background Art
[0002] The landing gear is an accessory device at the bottom of the aircraft that supports the aircraft and is used for ground movement during takeoff, landing or ground taxiing. The landing gear is the only part that supports the entire aircraft, so it is an indispensable and important part of the aircraft. Without the landing gear, the aircraft cannot move on the ground. After the aircraft takes off, the landing gear can be retracted depending on the performance of the aircraft. In order to meet the needs of aircraft takeoff, landing taxiing and ground taxiing, the bottom of the landing gear is equipped with a wheel with an inflatable tire. In order to shorten the landing taxiing distance, the wheel is equipped with a brake or automatic brake device. In addition, it also includes a load-bearing strut, a shock absorber, a retraction mechanism, a front wheel damper and a turning control mechanism.
[0003] When an aircraft touches down or taxis at high speed on an uneven runway, it collides violently with the ground. In addition to the small buffering effect of the pneumatic tire, most of the impact energy must be absorbed by the shock absorber. The most widely used shock absorber on modern aircraft is the oil-air shock absorber. When the shock absorber is compressed by the impact, the air acts as a spring and stores energy. The oil passes through the small hole at a very high speed, absorbing a large amount of impact energy and converting it into heat energy, so that the aircraft quickly stabilizes after the impact and does not bump continuously. Therefore, the appropriateness of the configuration of the buffer parameters used in the landing gear has a decisive influence on the performance of the buffer and the corresponding load it generates.
[0004] Before the landing gear is designed, it is usually necessary to check and calculate the buffer performance of the landing gear buffer system. In the process of checking and calculating the buffer performance of the landing gear buffer system, accurate modeling of the buffer is crucial to the evaluation of the landing gear buffer performance. At present, when simulating the landing gear buffer performance, it is usually necessary to use special commercial hydraulic software to complete the buffer dynamic modeling, or simplify the buffer into a variable force. This simplified method is quite different from the actual buffer tension or compression characteristics, resulting in poor accuracy, which will affect the accuracy of the dynamic simulation of the actual buffer. Summary of the invention
[0005] The technical problem to be solved by the present invention is to use the existing three-dimensional design software to establish a three-dimensional model for the problems existing in the background technology, thereby providing a simulation analysis method based on AMESim. By establishing a three-dimensional model of an oil-gas hybrid buffer, the buffering performance of the actual oil-gas hybrid buffer is simulated to solve the problem of setting the buffering performance parameters of the oil-gas hybrid buffer, which is of great significance to the development efficiency of the actual operating system. Specifically, it is a simulation analysis method of a bidirectional oil-gas hybrid buffer based on AMESim.
[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a simulation analysis method of a bidirectional oil-gas mixed buffer based on AMESim, the simulation analysis method comprising: S1. Establish a three-dimensional model of oil-gas mixed buffer; S2. In the AMESim simulation software, combined with the working principle of the oil-gas mixed buffer, a simulation model is created in the sketch mode, and the corresponding constraint parameters are determined; S3. Based on the simulation model, use the Submodel mode in AMESim and use the Premier submodel function to assign the recommended submodel to the created simulation model; S4. Set the parameters according to the recommended sub-model, and then run the simulation with AMESim simulation software to obtain the calculation results.
[0007] Furthermore, the simulation analysis method of the bidirectional oil-gas mixing buffer based on AMESim described in the present invention is adopted, and the oil-gas mixing buffer is three-dimensionally modeled using three-dimensional design software, and an X_T file is exported for backup.
[0008] Furthermore, the simulation analysis method of the bidirectional oil-gas mixed buffer based on AMESim described in the present invention is adopted. During the creation of the simulation model, according to the working principle of the oil-gas mixed buffer, the stretching process and the compression process are modeled separately to create a stretching simulation model and a compression simulation model; and the constraint parameters include the pressure action surface, the movable part action surface, the throttling flow area and the variable volume of the oil-gas mixed buffer; then according to the stretching simulation model and the compression simulation model, the Submodel mode in AMESim is used to assign the created simulation model using the Premier submodel function, and the stretching simulation sub-model and the compression simulation sub-model are recommended respectively, and the parameters are set in combination with the recommended sub-models, and then the simulation is run with the AMESim simulation software to obtain the calculation results, and finally, according to the simulation calculation results, the internal flow characteristics and the external stroke pressure curve of the oil-gas mixed buffer are obtained.
[0009] Furthermore, the simulation analysis method of the bidirectional oil-gas hybrid buffer based on AMESim described in the present invention is adopted, and the parameters set by the sub-model include the stretching return stroke of the actuator, the piston rod diameter and piston diameter of the buffer, the piston diameter, gap and piston width, buffer stroke, floating piston diameter, initial filling pressure of the buffer, and the size of the throttle hole on the piston.
[0010] Furthermore, the simulation analysis method of the bidirectional oil-gas mixed buffer based on AMESim described in the present invention is adopted, and the running simulation includes tensile simulation and compression simulation. The specific operation method is to set the simulation time to 10S and the printing accuracy to 0.001, and perform the running simulation through the AMESim simulation software. According to the simulation results, the tensile displacement curve, the tensile force value curve and the tensile stroke force value curve are drawn for the tensile simulation, and the compression displacement curve, the compression force value curve and the shrinkage stroke force value curve are drawn for the compression simulation, so as to obtain the internal flow characteristics and the external stroke pressure curve of the oil-gas mixed buffer.
[0011] Compared with the prior art, the simulation and analysis method of the bidirectional oil-gas hybrid buffer based on AMESim described in the present invention has the following beneficial effects: according to the structural characteristics, working principles and performance characteristics of the oil-gas hybrid buffer, a three-dimensional model is established using the existing three-dimensional design software, and the operation simulation is performed through the AMESim simulation software, which effectively solves the problem of setting the buffering performance parameters of the oil-gas hybrid buffer, effectively improves the research and development efficiency, and reduces the research and development cost, which is of great significance to the optimal design of the buffer. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The present invention will be further described in detail below in conjunction with the accompanying drawings.
[0013] Figure 1 It is a schematic diagram of the process of the present invention; Figure 2 This is a schematic diagram of the buffer structure model of the present invention; Figure 3 is a structural schematic diagram of the buffer when it is in a stretching stroke state; Figure 4 is a structural schematic diagram of the buffer when it is in a compression stroke state; Figure 5 It is a simulation model of the stretching stroke state of the buffer of the present invention; Figure 6 is the compression displacement curve of the buffer in the stretching stroke state of the present invention; Figure 7 is a compression force value curve of the buffer in the stretching stroke state of the present invention; Figure 8It is the compression stroke force value curve of the buffer in the stretching stroke state of the present invention; Fig. 9 It is a simulation model of the compression stroke state of the buffer of the present invention; Fig.10 is a compression displacement curve of the buffer in the compression stroke state of the present invention; Fig.11 is a compression force value curve of the buffer in the compression stroke state of the present invention; Fig.12 This is the compression stroke force value curve of the buffer in the compression stroke state of the present invention.
[0014] As shown in the figure: 1-earring bolt, 2-piston rod, 3-support ring, 4-pressure nut, 5-support ring, 6-sealing component 1, 7-air injection nozzle, 8-sealing component 2, 9-cylinder, 10-brake nut, 11-floating piston, 12-throttle hole, 13-sealing component 3, 14-vent, a-signal source, b-displacement signal converter, c-piston chamber 1, d-piston chamber with throttling, e-piston chamber 2, f-mass block with limit, g-piston chamber 3, h-zero force source, i-accumulator, j-variable volume chamber 1, k-throttle valve, l-variable volume chamber 2, m-hydraulic closing joint, n-hydraulic oil. DETAILED DESCRIPTION
[0015] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.
[0016] It should be noted that the structures, proportions, sizes, etc. drawn in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", etc. quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.
[0017] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "provided with" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0018] It should be noted that the term "comprise" or any other variation is intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.
[0019] like Figure 1 As shown, this embodiment provides a simulation analysis method for a bidirectional oil-gas mixed buffer based on AMESim, and the simulation analysis method includes: S1. Establish a three-dimensional model of oil-gas mixed buffer; S2. In the AMESim simulation software, combined with the working principle of the oil-gas mixed buffer, a simulation model is created in the sketch mode, and the corresponding constraint parameters are determined; S3. Based on the simulation model, use the Submodel mode in AMESim and use the Premier submodel function to assign the recommended submodel to the created simulation model; S4. Set the parameters according to the recommended sub-model, and then run the simulation with AMESim simulation software to obtain the calculation results.
[0020] Furthermore, the simulation analysis method of the bidirectional oil-gas mixed buffer based on AMESim described in this embodiment is adopted, and the oil-gas mixed buffer is three-dimensionally modeled using three-dimensional design software, and the X_T file is exported for standby. In the process of creating the simulation model, according to the working principle of the oil-gas mixed buffer, the stretching process and the compression process are modeled separately to create a stretching simulation model and a compression simulation model; and the constraint parameters include the pressure action surface, the movable part action surface, the throttling flow area and the variable volume of the oil-gas mixed buffer; then according to the stretching simulation model and the compression simulation model, the Submodel mode in AMESim is used to assign the created simulation model using the Premier submodel function, and the stretching simulation submodel and the compression simulation submodel are recommended respectively, and the parameters are set in combination with the recommended submodels, and then the simulation is run with the AMESim simulation software to obtain the calculation results, and finally, according to the simulation calculation results, the internal flow characteristics and the external stroke pressure curve of the oil-gas mixed buffer are obtained.
[0021] Furthermore, the simulation analysis method of the bidirectional oil-gas mixed buffer based on AMESim described in this embodiment is adopted, and the parameters set by the sub-model include the stretching return stroke of the actuator, the piston rod diameter and piston diameter of the buffer, the piston diameter, the gap and piston width, the buffer stroke, the floating piston diameter, the initial filling pressure of the buffer, and the size of the throttle hole on the piston. The running simulation includes stretching simulation and compression simulation. The specific operation method is to set the simulation time to 10S, the printing accuracy to 0.001, and perform the running simulation through the AMESim simulation software. According to the simulation results, the stretching displacement curve, the stretching force value curve and the stretching stroke force value curve are drawn for the stretching simulation, and the compression displacement curve, the compression force value curve and the shrinkage stroke force value curve are drawn for the compression simulation, so as to obtain the internal flow characteristics and the external stroke pressure curve of the oil-gas mixed buffer.
[0022] The present embodiment is further described in detail below with reference to the accompanying drawings. Figures 2 to 4 As shown, this embodiment provides a two-way oil-gas mixing buffer, which includes an earring bolt 1, a piston rod 2, a support ring 3, a compression nut 4, a support ring 5, an air injection nozzle 7, a cylinder 9, a brake nut 10, a floating piston 11, a throttle hole 12 and a vent hole 14. A sealing component 1 6 is provided between the support ring 5 and the inner wall of the cylinder 9, and a sealing component 2 8 is provided at the connection between the piston rod 2 and the support ring 5. A sealing component 3 13 is provided between the outer side surface of the rear end of the floating piston 11 and the inner wall of the cylinder 9. The piston rod 2 in the cylinder 9 and the support ring 3 are provided with a sealing component 3. A first oil-gas mixing chamber A is formed, a second oil-gas mixing chamber B is formed between the piston rod 2 and the first accommodating chamber in the floating piston 11, and an air chamber C is formed between the second accommodating chamber in the floating piston 11 and the cylinder 9; the first oil-gas mixing chamber A and the second oil-gas mixing chamber B are communicated with each other through a throttle hole 12, and an air injection nozzle 7 communicated with the first oil-gas mixing chamber (A) and an air vent 14 communicated with the air chamber C are provided on the cylinder 9; at the same time, connecting holes are respectively provided at the front end of the earring bolt 1 and the rear end of the cylinder 3.
[0023] The bidirectional buffer structure provided in this embodiment has the following working principle: 1. Stretch buffer stroke: Figure 2As shown, since the outer tube 9 is installed in the landing gear, when the outer tube 9 is in a fixed state, the earring bolt 1 applies a tensile external load to the left under the action of the external load, pulling the piston rod 2 to move to the left, and the piston rod 2 contacts the brake nut 10, and the floating piston 11 is driven to move to the left as a whole. Then, the oil-gas mixture in the A chamber is compressed, and the oil-gas mixture flows from the A chamber to the B chamber through the throttle hole 12. The gas in the A chamber and the B chamber is compressed, the pressure increases, and energy is stored. At this time, the volume of the A chamber becomes smaller, the volume of the B chamber remains unchanged, and the volume of the C chamber becomes larger. The C chamber is connected to the atmosphere through the vent hole 14. When the brake nut 10 contacts the support ring 3, the maximum buffer stroke is reached, the maximum buffer force is reached, and the pull-out buffer stroke is completed. Figure 3 shown.
[0024] When the earring bolt 1 releases the external load, the oil-gas mixture in the A chamber and the B chamber expands, pushing the floating piston 11 to move to the right, the piston rod 2 contacts the brake nut 10, and the brake nut 10 pushes the piston rod 2 to move to the right, the gas in the oil-gas mixture in the A chamber expands, and the oil-gas mixture flows from the B chamber to the A chamber through the throttle hole 12, the pressure decreases, and the energy is released. The volume of the A chamber increases, the volume of the B chamber remains unchanged, and the volume of the C chamber decreases, and the air is discharged from the C chamber through the vent 14. When the right end face of the floating piston 11 contacts the rear end face of the cylinder 9, the neutral return stroke is reached, and the neutral buffer stroke is completed. The structure when reaching neutral is as follows Figure 2 shown.
[0025] 2. Compression buffer stroke: Figure 2 As shown, since the outer tube 9 is installed in the landing gear, when the outer tube 9 is in a fixed state, the earring bolt 1 applies a rightward compressive external load under the action of the external load, pushing the piston rod 2 to move rightward, and the piston rod 2 slides along the inner cavity of the floating piston 11. The piston rod 2 enters the A chamber and the B chamber, and the volume of the A chamber and the B chamber is reduced, the oil-gas mixture in the B chamber is compressed, and the oil-gas mixture flows from the B chamber to the A chamber through the throttle hole 12. The gas in the A chamber and the B chamber is compressed, the pressure increases, and energy is stored. The volume of the A chamber increases, the volume of the B chamber decreases, and the volume of the C chamber remains unchanged. When the right end face of the piston rod 2 contacts the right end face of the floating piston 11, the maximum compression buffer stroke is reached, the maximum buffer force is reached, and the compression buffer stroke is completed. Figure 4 shown.
[0026] When the earring bolt 1 releases the external load, the oil-gas mixture in the A and B chambers expands, and the air pressure in the B chamber pushes the floating piston 4 to move to the left, synchronously driving the piston rod 2 to move. The gas in the A chamber oil-gas mixture expands, and the oil-gas mixture flows from the A chamber to the B chamber through the throttle hole 12, the pressure decreases, and the energy is released. The volume of the A chamber decreases, the volume of the B chamber increases, and the volume of the C chamber remains unchanged. The piston rod 2 contacts the brake nut 10, reaches the neutral return stroke, and completes the compression neutral buffer stroke. The structure when reaching neutral is as shown in FIG. Figure 2 shown.
[0027] According to the bidirectional buffer structure provided in this embodiment, combined with its working principle, existing three-dimensional design software is used for modeling, and the modeling step specifically includes the following steps: 1. Through analyzing the principle of bidirectional oil-gas mixed buffer, the stretching process modeling and compression process modeling are adopted; 2. Modeling process analysis: 2.1 Determine the pressure action surface; 2.2 Determine the movable parts; 2.3 Determine the throttling flow area; 2.4 Determine the variable volume.
[0028] 3. Build the model 3.1 According to the structure of the bidirectional oil-gas mixed buffer, a simulation model is established. The simulation model is divided into a tension model and a compression model. Each model is further divided into a piston rod cavity model, a piston cavity model, a throttling valve model, an oil-gas mixed cavity model and a stroke drive model; 3.2 Using the Submodel mode in AMESim, use the Premier submodel function to assign the recommended submodel to the model established in 3.1; 3.3 According to the structural design parameters of the bidirectional oil-gas mixed buffer to be simulated, set the parameter values of each component of the sub-model recommended in 3.2; 3.4 After completing the parameter settings in step 3.3, use the Simulation mode to enter the simulation mode, set the total running time and printing time interval of the simulation model established in step 3.1, and start the simulation calculation to complete the simulation calculation of the bidirectional oil-gas mixed buffer based on AMESim. According to the simulation calculation results, the internal flow characteristics and external stroke pressure curve of the bidirectional oil-gas mixed buffer are obtained.
[0029] For the modeling of the stretching process, the specific modeling process includes the following steps: 1. Create a simulation model in sketch mode like Figure 5As shown, it is a stretching simulation model, a and b constitute the stroke drive model, c simulates chamber A, d simulates the annular leakage between chamber A and chamber B, e, f and g constitute the simulation of chamber B, f simulates the weight of the piston rod and the stroke of the buffer, h is the zero force source as the port closure, i is the accumulator to simulate the compressed gas in chamber A and chamber B, j is the variable volume chamber to simulate the volume change of chamber B, k is the throttle valve to simulate the throttle hole on the piston, l is the variable volume chamber to simulate the volume change of chamber A, m is the hydraulic closure joint, and n is the hydraulic oil. Among them, a is the signal source, b is the displacement signal converter, c is the piston chamber 1, d is the piston chamber with throttling, e is the piston chamber 2, f is the mass block with limit, g is the piston chamber 3, h is the zero force source, i is the accumulator, j is the variable volume chamber 1, k is the throttle valve, l is the variable volume chamber 2, m is the hydraulic closure joint, and n is the hydraulic oil.
[0030] 2. Set up the submodel Using the Submodel mode in AMESim, use the Premier submodel function to assign the recommended submodel to the model established in 1.
[0031] 3. Set parameters The parameter a sets the stretching return stroke of the actuator, c sets the piston rod diameter and piston diameter of the buffer, d sets the piston diameter, gap and piston width, e sets the piston diameter and piston rod diameter to 0mm, f sets the buffer stroke, g sets the floating piston diameter, i sets the initial filling pressure of the buffer, k sets the size of the throttle hole on the piston, and the others use the default settings.
[0032] 4. Run the simulation Set the simulation time to 10S, the printing accuracy to 0.001, run the simulation, and use the data obtained from the simulation to draw the tensile displacement curve, tensile force value curve, and tensile stroke force value curve. The tensile displacement curve is shown in Figure 6, and the tensile force value curve is shown in Figure 7. Figure 7 As shown, the tensile stroke force curve is as follows Figure 8 shown.
[0033] For compression process modeling, the specific modeling process includes the following steps: 1. Create a simulation model in sketch mode like Fig. 9 As shown, it is a compression simulation model, a and b constitute a stroke drive model, c simulates chamber A, d simulates the annular leakage between chamber A and chamber B, e and f constitute a simulation of chamber B, f simulates the weight of the piston rod and the stroke of the buffer, h is a zero force source as a port closure, i is an accumulator simulating the compressed gas in chambers A and B, j is a variable volume chamber simulating and calculating the volume change of chamber B, k is a throttle valve simulating the throttle hole on the piston, l is a variable volume chamber simulating and calculating the volume change of chamber A, m is a hydraulic closure joint, and n is hydraulic oil.
[0034] Among them, a is the signal source, b is the displacement signal converter, c is the piston chamber one, d is the piston chamber with throttling, e is the piston chamber two, f is the mass block with limit, h is the zero force source, i is the accumulator, j is the variable volume chamber one, k is the throttle valve, l is the variable volume chamber two, m is the hydraulic closed joint, and n is the hydraulic oil.
[0035] 2. Set up the submodel Using the Submodel mode in AMESim, use the Premier submodel function to assign the recommended submodel to the model established in 1.
[0036] 3. Set parameters The parameter a sets the stretching return stroke of the actuator, c sets the piston rod diameter and piston diameter of the buffer, d sets the piston diameter, gap and piston width, e sets the piston diameter and piston rod diameter to 0mm, f sets the buffer stroke, g sets the floating piston diameter, i sets the initial filling pressure of the buffer, k sets the size of the throttle hole on the piston, and the others use the default settings.
[0037] 4. Run the simulation Set the simulation time to 10S, the printing accuracy to 0.001, run the simulation, and use the data obtained from the simulation to draw the compression displacement curve, compression force value curve, and compression stroke force value curve. Fig.10 As shown, the compression force curve is as follows Fig.11 As shown, the compression stroke force curve is as follows Fig.12 shown.
[0038] In summary, by adopting the simulation analysis method described in the present invention, according to the structural characteristics, working principles and performance characteristics of the oil-gas hybrid buffer, a three-dimensional model is established using the existing three-dimensional design software, and the AMESim simulation software is used to perform simulation, which effectively solves the problem of setting the buffering performance parameters of the oil-gas hybrid buffer, effectively improves the R&D efficiency, and reduces the R&D cost, which is of great significance to the optimal design of the buffer.
[0039] Other aspects of the present invention that are not described in detail are all conventional techniques known to those skilled in the art.
[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, various changes and variations may occur. Any modifications, equivalent substitutions, improvements, etc. made using the present invention should be included in the scope of protection of the present invention.
Claims
1. A simulation analysis method for a bidirectional oil-gas mixed buffer based on AMESim, characterized in that: The simulation analysis method comprises: S1. Establish a three-dimensional model of oil-gas mixed buffer; S2. In the AMESim simulation software, combined with the working principle of the oil-gas mixed buffer, a simulation model is created in the sketch mode, and the corresponding constraint parameters are determined; S3. Based on the simulation model, use the Submodel mode in AMESim and use the Premier submodel function to assign the recommended submodel to the created simulation model; S4. Set the parameters according to the recommended sub-model, and then run the simulation with AMESim simulation software to obtain the calculation results.
2. The simulation analysis method of the bidirectional oil-gas mixed buffer based on AMESim according to claim 1, characterized in that: The oil-gas mixed buffer is 3D modeled using 3D design software, and the X_T file is exported for backup.
3. The simulation analysis method of the bidirectional oil-gas mixed buffer based on AMESim according to claim 1, characterized in that: In the process of creating the simulation model, according to the working principle of the oil-gas mixing buffer, the stretching process and the compression process are modeled respectively to create a stretching simulation model and a compression simulation model; and the constraint parameters include the pressure action surface, the movable part action surface, the throttling flow area and the variable volume of the oil-gas mixing buffer; then according to the stretching simulation model and the compression simulation model, the Submodel mode in AMESim is used to assign the created simulation model using the Premier submodel function, and the stretching simulation submodel and the compression simulation submodel are recommended respectively, and the parameters are set in combination with the recommended submodels, and then the simulation is run with the AMESim simulation software to obtain the calculation results, and finally, according to the simulation calculation results, the internal flow characteristics and the external stroke pressure curve of the oil-gas mixing buffer are obtained.
4. The simulation analysis method of the bidirectional oil-gas mixed buffer based on AMESim according to claim 3 is characterized in that: The parameters set by the sub-model include the stretching return stroke of the actuator, the piston rod diameter and piston diameter of the buffer, the piston diameter, gap and piston width, the buffer stroke, the floating piston diameter, the initial filling pressure of the buffer, and the size of the throttle hole on the piston.
5. The simulation analysis method of the bidirectional oil-gas mixed buffer based on AMESim according to claim 3 is characterized in that: The running simulation includes tensile simulation and compression simulation. The specific operation method is to set the simulation time to 10S and the printing accuracy to 0.001, and perform the running simulation through the AMESim simulation software. According to the simulation results, the tensile displacement curve, the tensile force value curve and the tensile stroke force value curve are drawn for the tensile simulation, and the compression displacement curve, the compression force value curve and the shrinkage stroke force value curve are drawn for the compression simulation, so as to obtain the internal flow characteristics and the external stroke pressure curve of the oil-gas mixed buffer.