Simulation modeling method and device of hydraulic recovery buffer shock absorber and medium

Abstract

The application relates to a simulation modeling method and device of a hydraulic recovery buffer shock absorber and a medium, and comprises the following steps: a hydraulic recovery buffer shock absorber model is established; actual structure parameters are used to value the hydraulic recovery buffer shock absorber model; a simulation excitation signal is set; simulation is started by applying excitation; simulation results of a dynamometer diagram are extracted; simulation and test data are compared, and if the error is too large, model parameters are readjusted for simulation. The application establishes detailed models of each part of the hydraulic recovery buffer shock absorber through AMESim software; each parameter of the model is valued according to the stiffness of each valve system, the size of a flow-through hole and the diameter of a working cylinder and the like in an actual structure, the simulation results of the model can accurately predict a shock absorber dynamometer diagram, and structure optimization is carried out through the simulation results; and the application can effectively save R&D cost and shorten a development cycle.

Description

Technical Field

[0001] This invention belongs to the field of vibration damper technology, and relates to a simulation modeling method, device and medium for a hydraulic restoring buffer vibration damper. Background Technology

[0002] Shock absorbers, as a crucial component of a car's chassis suspension, play a vital role in isolating and attenuating vibrations from the road surface onto the vehicle body. Under extreme road impacts, when the damping force is insufficient to cushion the vehicle's movement, the shock absorber will reach its elastic limit at high speed. To absorb impact energy, a hydraulic damping structure is typically added to the end of a standard shock absorber, such as... Figure 1 Despite extensive simulation and experimental research on vibration dampers, the complexity of damper design theory has hindered the development of a reliable and stable design method for key internal valve system parameters. Current technology relies on a traditional approach of "experience + repeated trials," which is time-consuming and costly. Therefore, utilizing modern computer simulation technology to predict damper performance and optimize key parameters has become a quick and effective method.

[0003] Currently, there are relatively few simulation studies on hydraulic restoring damper shock absorbers. For example, the article "Dynamic Modeling of Displacement-Related Damper and Its Impact on Vehicle Performance" uses ADAMS / Hydraulics to build a model of a stroke-related damper, but the model lacks detailed structural modeling of the valve system, and the bypass slot opening degree is expressed through the step function, which is an approximate equivalent. The article "Modeling and Simulation of a Dual-Cylinder Stacked Valve Plate Air-Inflated Damper Based on AMESim" uses AMESim to build a hydraulic damper model, but the damper in the article is a conventional damper, lacking a restoring limiting structure. The article "Simulation and Experiment of Damping Characteristics of Stroke-Sensitive Damper" uses AMESim and MATLAB / Simulink co-simulation to build a simulation model of a bypass slot damper, but the structure differs from the hydraulic restoring damper shock absorber in this application, and it lacks detailed structural modeling of the valve system. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the above-mentioned problems existing in the prior art, and to provide a simulation modeling method, device and medium for a hydraulic restoring buffer shock absorber.

[0005] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0006] To solve the above-mentioned technical problems, the present invention is implemented using the following technical solution:

[0007] A simulation modeling method for a hydraulic restoring shock absorber includes:

[0008] Establish a model of a hydraulic recovery buffer damper;

[0009] The hydraulic restoring buffer damper model is assigned values ​​based on the actual structural parameters.

[0010] Set the simulation excitation signal;

[0011] Apply the stimulus to begin the simulation calculation;

[0012] Extract the simulation results of the indicator diagram.

[0013] Furthermore, a simulation modeling method for a hydraulic restoring buffer damper also includes comparing simulation and experimental data. If the error is too large, the model parameters are readjusted for simulation calculation.

[0014] Furthermore, the hydraulically recovering shock absorber model includes:

[0015] Working cylinder module: used to simulate the liquid flow in the upper and lower chambers of the shock absorber;

[0016] The upper cavity is a rod-type model, and the lower cavity is a rodless model;

[0017] Leakage module: used to simulate leakage between the piston and the working cylinder;

[0018] Restoration Limit Structure Module: The restoration limit structure module uses a combination of cone valves and check valves to simulate the change in flow area when the shock absorber is stretched to its limit position;

[0019] Bottom valve orifice module: used to simulate the short orifice on the bottom valve;

[0020] Compression valve module: used to simulate the valve plate on the compression side of the bottom valve;

[0021] The spring stiffness is equivalent to the valve plate stiffness, and the spring preload is equivalent to the force experienced when the valve is opened.

[0022] Compression valve normally open orifice module: used to simulate the normally open orifice on the foot valve;

[0023] Oil reservoir module: used to simulate the oil reservoir of a shock absorber;

[0024] Normally open orifice module for recovery valve: used to simulate the normally open orifice on a piston;

[0025] Recovery valve module: Used to simulate the valve plate on the piston's recovery side;

[0026] Piston bore module: Used to simulate the long bore on a piston.

[0027] Furthermore, the specific content of assigning values ​​to the hydraulic restoring buffer damper model based on actual structural parameters is as follows:

[0028] The parameters of the model are assigned values ​​based on the stiffness of each valve system, the size of the flow orifice, and the diameter of the working cylinder in the actual structure.

[0029] Furthermore, the specific details of setting the simulation excitation signal are as follows:

[0030] The input is the same excitation frequency and stroke as in the experiment, in the form of a sine wave;

[0031] The relationship between working stroke, frequency, and maximum speed is: v = π × f × s × 10 -3 ;

[0032] in:

[0033] v is the piston speed of the shock absorber, measured in m / s;

[0034] s is the piston stroke of the shock absorber, in mm;

[0035] f is the frequency of the shock absorber piston movement, measured in Hz.

[0036] Furthermore, the application of excitation to initiate simulation calculations specifically includes:

[0037] After setting the excitation parameters, start the simulation calculation with the given time and compensation.

[0038] Furthermore, the dynamometer diagram represents the relationship between resistance and displacement, and the sensor module is used to extract the simulation results of the dynamometer diagram.

[0039] Furthermore, a hydraulic recovery damper model was created using the AMESim software.

[0040] A testing apparatus, comprising one or more processors;

[0041] Memory, used to store one or more programs;

[0042] When the one or more programs are executed by the one or more processors, the one or more processors perform the method as described above.

[0043] A computer-readable storage medium having a computer program stored thereon that, when executed by a processor, implements the method described above.

[0044] Compared with the prior art, the beneficial effects of the present invention are:

[0045] This invention uses AMESim software to establish detailed models of various parts of a hydraulic restoring buffer shock absorber, including the working cylinder, reservoir cylinder, piston, bottom valve, and restoring buffer structure. Based on the stiffness of each valve system, the size of the flow orifice, and the diameter of the working cylinder in the actual structure, values ​​are assigned to the model parameters. The simulation results can accurately predict the shock absorber's indicator diagram, and further structural optimization can be performed using the simulation results. Compared to traditional methods, this invention can effectively save R&D costs and shorten the development cycle. Attached Figure Description

[0046] The invention will now be further described with reference to the accompanying drawings:

[0047] Figure 1 This is a schematic diagram of a hydraulically recovering shock absorber.

[0048] Figure 2 For modeling flowcharts;

[0049] Figure 3 This is a schematic diagram of a hydraulic recovery buffer damper model;

[0050] Figure 4 This is a diagram showing the dynamometer function of a hydraulic recovery damper.

[0051] Figure 5 This is a dynamometer diagram for a standard vibration damper.

[0052] Figure 6 A schematic diagram comparing the dynamometer diagram obtained from simulation and the dynamometer diagram obtained from experimental testing in the same coordinate system;

[0053] In the picture:

[0054] 1. Working cylinder module;

[0055] 2. Restoration limit structure module;

[0056] 3. Bottom valve hole module;

[0057] 4. Compression valve module;

[0058] 5. Compression valve normally open port module;

[0059] 6. Oil reservoir module;

[0060] 7. Restoration valve normally open hole module;

[0061] 8. Restoration valve module;

[0062] 9. Piston Hole Module A;

[0063] 10. Piston Hole Module B;

[0064] 11. Excitation signal;

[0065] 12. Sensor module. Detailed Implementation

[0066] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this invention. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this invention, and should not be construed as limiting the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention. The embodiments of this invention will be described in detail below with reference to the accompanying drawings.

[0067] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0068] The present invention will now be described in detail with reference to the accompanying drawings:

[0069] This invention proposes a simulation modeling method for hydraulic restoring shock absorbers based on AMESim. The modeling flowchart is available for reference. Figure 2 The specific implementation process is as follows:

[0070] (1) Use AMESim software to build a hydraulic recovery damper model, refer to... Figure 3The module consists of several modules: 1) Working cylinder module, with a rod-type upper chamber and a rodless lower chamber; a leakage module simulates leakage between the piston and the working cylinder. 2) Restoration limit structure module, using a combination of a cone valve and a check valve to simulate the change in flow area when the damper is stretched to its limit position. 3) Bottom valve orifice module. 4) Compression valve module, where spring stiffness is equivalent to valve plate stiffness, and spring preload is equivalent to the force experienced when the valve is opened. 5) Compression valve normally open orifice module. 6) Oil reservoir cylinder module. 7) Restoration valve normally open orifice module. 8) Restoration valve module; similarly, spring stiffness is equivalent to valve plate stiffness, and spring preload is equivalent to the force experienced when the valve is opened. 9 and 10) Piston orifice modules.

[0071] The hydraulic recovery damper model includes:

[0072] Working cylinder module: used to simulate the liquid flow in the upper and lower chambers of the shock absorber;

[0073] The upper cavity is a rod-type model, and the lower cavity is a rodless model;

[0074] The model built with AMESim software is similar to the model built with Simulink software. It has pre-packaged small functions, and the modeling process only requires dragging and dropping, setting parameters, and connecting them. The working cylinder is part of the actual shock absorber structure and is divided into an upper chamber and a lower chamber. When modeling, the rod-type chamber model and the rodless chamber model in AMESim software are used to represent the upper and lower chambers of the actual structure.

[0075] Leakage module: Used to simulate leakage between the piston and the working cylinder.

[0076] Restoration Limit Structure Module: The restoration limit structure module uses a combination of cone valves and check valves to simulate the change in flow area when the shock absorber is stretched to its limit position;

[0077] Bottom valve orifice module: used to simulate the short orifice on the bottom valve.

[0078] Compression valve module: used to simulate the valve plate on the compression side of the bottom valve.

[0079] The spring stiffness is equivalent to the valve plate stiffness, and the spring preload is equivalent to the force experienced when the valve is opened.

[0080] The AMESim software does not have a direct compression valve model. Instead, it uses spring and conical valve models to simulate the compression valve structure in actual vibration dampers. The spring stiffness is equivalent to the valve plate stiffness, and the spring preload is equivalent to the force experienced when the valve is opened. This represents the correspondence between the spring parameters in the model and the actual structural parameters.

[0081] Compression valve normally open orifice module: used to simulate the normally open orifice on the foot valve.

[0082] Oil reservoir module: an oil reservoir used to simulate a shock absorber.

[0083] Normally open orifice module for recovery valve: used to simulate the normally open orifice on a piston.

[0084] Recovery valve module: Used to simulate the valve plate on the piston's recovery side;

[0085] Piston bore module: used to simulate elongated holes on a piston.

[0086] The hydraulic restoring buffer damper is a special type of damper. It adds a restoring buffer structure to the basic structure of a regular damper. The structure of the regular damper is existing technology and does not require further explanation. This invention aims to solve the problem of how to build a model in AMESim software, so that the final simulated indicator diagram matches the experimental results. The actual structure of the hydraulic restoring buffer damper can be divided into a working cylinder, a reservoir cylinder, etc., and the corresponding structural division in the AMESim model is also the same, referred to in this application as the working cylinder module, reservoir cylinder module, etc. The connection relationships of these modules in the model are described in [reference needed]. Figure 3 As shown, the connection relationships of the actual structure are existing mature structures.

[0087] The hydraulic restoring buffer damper model is assigned values ​​based on actual structural parameters, specifically as follows:

[0088] The parameters of the model are assigned values ​​based on the stiffness of each valve system, the size of the flow orifice, and the diameter of the working cylinder in the actual structure.

[0089] The actual structural parameters are shown in Table 1 below. The parameters of the actual structure and the model are corresponding, and the assignment operation is a software-level operation.

[0090] Table 1

[0091] Piston diameter / mm 32 Piston rod diameter / mm 22 Piston-cylinder gap / mm 0.04 Compensation cavity inner diameter / mm 45.8 Maximum lift of the recovery valve disc (mm) 0.4 Maximum lift of compression valve disc / mm 0.4 Oil density (kg / m3) 845.5 Absolute viscosity of oil (mPa·s) 20.76 Oil bulk modulus / MPa 1700 Oil temperature / °C 20 Compensation chamber inflation pressure / MPa 0.6 Restoration valve preload / N 125 Compression valve preload / N 50 Normal flow rate coefficient 0.82

[0092] (2) Set the simulation excitation signal. Figure 3 11 is the excitation signal, with the same excitation frequency and stroke as in the experiment, in the form of a sine wave. The relationship between the working stroke, frequency, and maximum speed is: v = ο × f × s × 10 -3 Where v is the piston speed of the shock absorber, in m / s, s is the piston stroke of the shock absorber, in mm, and f is the piston frequency of the shock absorber, in Hz.

[0093] After setting the excitation parameters, start the simulation calculation with the given time and compensation.

[0094] (3) Extract the simulation results from the indicator diagram. The indicator diagram shows the relationship between resistance and displacement, which can be obtained from... Figure 3 Extract from sensor module 12, such as Figure 4 As shown.

[0095] The extraction process is a software-level operation. The simulation result is numerical, that is... Figure 4The horizontal and vertical coordinate values ​​are calculated using software.

[0096] Compared to Figure 5 The dynamometer diagram of a common vibration damper shows that when the recovery limit buffer vibration damper is stretched to its limit position, the damping will suddenly increase to prevent structural damage. The model in this invention can effectively simulate the dynamometer diagram of such vibration dampers, greatly improving the simulation accuracy.

[0097] (4) Compare the simulation and experimental data. If the error is too large, the model parameters can be readjusted for simulation.

[0098] The comparison process involves placing the dynamometer diagram obtained from simulation and the dynamometer diagram obtained from experimental testing on the same coordinate system, such as... Figure 6 Compare the damping force at the 0mm displacement position with the maximum damping force at the working position of the hydraulic reset limit block, i.e. Figure 6 The three positions marked A, B, and C are shown in Table 2 below. If the error exceeds 10%, the model needs to be readjusted.

[0099] Table 2

[0100] Simulated damping force / N 1465 -1312 4640 Test damping force / N 1437 -1360 4618 error 1.95％ -3.53％ 0.48％

[0101] Based on the simulation modeling method of the hydraulic restoring damper described above, this invention provides another simulation calculation device for a hydraulic restoring damper. The device includes, but is not limited to, one or more processors and a memory.

[0102] Memory, as a computer-readable storage medium, can be used to store software programs, computer-executable programs, and modules, such as the program instructions corresponding to the simulation modeling method of the hydraulic restoring shock absorber in this embodiment of the invention. The processor executes the software programs, instructions, and modules stored in the memory to perform various functional applications and data processing of the vehicle, thereby realizing the aforementioned simulation modeling method for the hydraulic restoring shock absorber.

[0103] The memory may primarily include a program storage area and a data storage area. The program storage area may store the operating system and at least one application program required for a function; the data storage area may store data created based on the use of the terminal. Furthermore, the memory may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device.

[0104] The present invention also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements a simulation modeling method for a hydraulic restoring shock absorber. The simulation modeling method for the hydraulic restoring shock absorber includes the following:

[0105] Establish a model of a hydraulic recovery buffer damper;

[0106] The hydraulic restoring buffer damper model is assigned values ​​based on the actual structural parameters.

[0107] Set the simulation excitation signal;

[0108] Apply the stimulus to start the simulation;

[0109] Extract the simulation results from the indicator diagram;

[0110] If the error is too large when comparing simulation and experimental data, readjust the model parameters and perform simulation calculations.

[0111] The computer-readable storage medium provided by the present invention has computer-executable instructions that are not limited to the method operations described above, but can also execute related operations in the simulation modeling method of the hydraulic restoring buffer shock absorber provided in any embodiment of the present invention.

[0112] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed in this application can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0113] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present invention are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. Computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line DSL) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state disk, SSD), etc.

[0114] In the above embodiments, the various units and modules are divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be achieved; in addition, the specific names of each functional unit are only for easy differentiation and are not used to limit the scope of protection of the present invention.

[0115] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions, and improvements made by those skilled in the art within the scope of the technology disclosed in the present invention, and within the spirit and principles of the present invention, should be included within the scope of protection of the present invention. Furthermore, all content not described in detail in this specification is prior art known to those skilled in the art.

Claims

1. A simulation modeling method for a hydraulic restoring buffer damper, characterized in that, include: Establish a model of a hydraulically recovering shock absorber; The hydraulic restoring buffer damper model is assigned values ​​based on the actual structural parameters. Set the simulation excitation signal; Apply the stimulus to begin the simulation calculation; Extract the simulation results of the indicator diagram; The hydraulic recovery damper model includes: Working cylinder module: used to simulate the liquid flow in the upper and lower chambers of the shock absorber; The upper cavity is a rod-type model, and the lower cavity is a rodless model; Leakage module: used to simulate leakage between the piston and the working cylinder; Restoration Limit Structure Module: The restoration limit structure module uses a combination of cone valves and check valves to simulate the change in flow area when the shock absorber is stretched to its limit position; Bottom valve orifice module: used to simulate the short orifice on the bottom valve; Compression valve module: used to simulate the valve plate on the compression side of the bottom valve; The spring stiffness is equivalent to the valve plate stiffness, and the spring preload is equivalent to the force experienced when the valve is opened. Compression valve normally open orifice module: used to simulate the normally open orifice on the foot valve; Oil reservoir module: used to simulate the oil reservoir of a shock absorber; Normally open orifice module for recovery valve: used to simulate the normally open orifice on a piston; Recovery valve module: Used to simulate the valve plate on the piston's recovery side; Piston bore module: used to simulate the long bore on a piston; The specific content of assigning values ​​to the hydraulic restoring buffer damper model based on actual structural parameters is as follows: The parameters of the model are assigned values ​​based on the stiffness of each valve system, the size of the flow orifice, and the diameter of the working cylinder in the actual structure. The specific details of setting the simulation excitation signal are as follows: The input is the same excitation frequency and stroke as in the experiment, in the form of a sine wave; The relationship between working stroke, frequency, and maximum speed is as follows: ; in: It is the piston speed of the shock absorber, measured in m / s; This refers to the piston stroke of the shock absorber, measured in mm. It is the frequency of piston movement in the shock absorber, measured in Hz; The application of excitation to initiate simulation calculations specifically includes: After setting the excitation parameters, start the simulation calculation with the given time and compensation.

2. The simulation modeling method for a hydraulic restoring buffer damper according to claim 1, characterized in that: It also includes comparing simulation and experimental data; if the error is too large, the model parameters are readjusted and simulation calculations are performed.

3. The simulation modeling method for a hydraulic restoring buffer damper according to claim 1, characterized in that: The dynamometer diagram shows the relationship between resistance and displacement, and the sensor module is used to extract the simulation results of the dynamometer diagram.

4. The simulation modeling method for a hydraulic restoring buffer damper according to claim 1, characterized in that: A hydraulic recovery damper model was created using the AMESim software.

5. A testing device, characterized in that: Includes one or more processors; Memory, used to store one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the method as described in any one of claims 1-4.

6. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by the processor, it implements the method as described in any one of claims 1-4.

Images