A dynamic analysis method and system for a two-dimensional vibration system in a centrifugal field

Abstract

This invention discloses a dynamic analysis method and system for a two-dimensional vibration system in a centrifugal force field. The method involves establishing a three-dimensional model of a two-dimensional vibration table in a centrifugal force field; importing the three-dimensional model into ADAMS to obtain an ADAMS mechanical model; setting constraints and loads on the ADAMS mechanical model; establishing the output dynamic parameters of the ADAMS mechanical model; setting the simulation time and step size; extracting the required dynamic parameters; and completing the dynamic analysis. This invention effectively solves the motion decoupling problem of a two-dimensional vibration table in a centrifugal force field, accurately simulates the motion of the two-dimensional vibration table in a centrifugal force field, and can realistically reflect the dynamic characteristics of the system, providing an important reference for the design and optimization of practical experimental systems.

Description

Technical Field

[0001] This invention belongs to the field of multibody dynamics technology, specifically relating to a dynamic analysis method and system for a two-dimensional vibration system in a centrifugal force field. Background Technology

[0002] The operating environment of spacecraft is affected by a combination of factors, including high acceleration, vibration, temperature, air pressure, and noise. Among these, high acceleration and vibration are two of the most fundamental factors. Therefore, conducting vibration-centrifugal combined mechanical environment simulation experiments in the laboratory is of great strategic importance.

[0003] Currently, the overload-vibration environment composite simulation in ground tests is mainly achieved by constructing a vibration-centrifuge composite test system by mounting a vibration table on the centrifuge arm. However, the development of centrifuge-vibration table test systems faces challenges such as system complexity, design difficulty, and high cost, making it difficult to establish a complete test system solely based on past design experience and simple theoretical calculations.

[0004] Therefore, previous studies typically employed a method of simplifying the shaking table into a multi-rigid-body model mounted on the centrifuge arm to form a multi-rigid-body system for dynamic simulation experiments, or directly applying overload-vibration loads in finite element software to simulate the actual environment, thereby reducing development costs. However, in practical research, the focus is primarily on the dynamic analysis of the mechanism's structure. Finite element analysis struggles to accurately describe the motion and force conditions of the centrifuge arm and moving coil. Furthermore, due to the complex issue of motion decoupling in two-dimensional shaking table simulations, current domestic and international research on the dynamic simulation of centrifuge-vibration test systems can only simulate one-dimensional vibration in a centrifugal force field. A simulation test system of a two-dimensional shaking table in a centrifugal force field has not yet been observed. Therefore, how to solve the motion decoupling problem and establish a realistic and effective two-dimensional shaking table system in a centrifugal force field within dynamic analysis software is a significant challenge. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a dynamic analysis method and system for a two-dimensional vibration system in a centrifugal force field, which addresses the shortcomings of the prior art. This method solves the technical problem of motion decoupling of a two-dimensional vibration table in a centrifugal force field, accurately simulates the motion of the two-dimensional vibration table in a centrifugal force field, and can truly reflect the dynamic characteristics of the system, providing an important reference for the design and optimization of actual experimental systems.

[0006] The present invention adopts the following technical solution:

[0007] A dynamic analysis method for a two-dimensional vibration system in a centrifugal force field includes the following steps:

[0008] S1. Establish a three-dimensional model of the two-dimensional vibration table in the centrifugal force field;

[0009] S2. Import the three-dimensional model obtained in step S1 into ADAMS to obtain the ADAMS mechanical model, and set the constraints and loads of the ADAMS mechanical model.

[0010] S3. Establish the output dynamic parameters of the ADAMS mechanical model obtained in step S2;

[0011] S4. Set the simulation time and step size, extract the required dynamic parameters, and complete the dynamic analysis.

[0012] Preferably, in step S1, a three-dimensional model of the two-dimensional vibration table in the centrifugal force field is created using SolidWorks.

[0013] Preferably, in step S2, mass values ​​are assigned to each mechanism in the ADAMS mechanical model, and connection pairs corresponding to the actual situation are set between each mechanism to realize the motion coordination between the two-dimensional vibration tables.

[0014] Preferably, step S2 specifically includes:

[0015] S201. Set the constraint between the centrifuge arm and the centrifuge shaft as a rotary joint about the centrifuge shaft;

[0016] S202. Set the constraint between the moving coil and the vibration table base to a spring constraint; set the constraint between the moving coil and the vibration table base to a sliding pair;

[0017] S203. Rotary pairs are added between the vibration table and the linkage device, and between the table surface and the specimen and the linkage device, respectively, to connect them. The movement between the vibration tables in two directions is achieved through the cooperation of the rotary pairs.

[0018] More preferably, for a radial vibration table, the constraint between the vibration table and the linkage is set as a rotary joint, with the rotation axis perpendicular to the ground, and the linkage is a driven member;

[0019] The constraint between the platform and the specimen and the linkage is set as a revolute joint, with the axis of rotation perpendicular to the ground, and the platform and the specimen as driven members.

[0020] More preferably, for a tangential vibration table, the constraint between the vibration table and the linkage is set as a rotary joint, with the rotation axis perpendicular to the ground, and the linkage is a driven member;

[0021] The constraint between the platform and the specimen and the linkage is set as a revolute joint, with the axis of rotation perpendicular to the ground, and the platform and the specimen as driven members.

[0022] More preferably, in step S3, a drive is added to the rotary joint; a drive is added to the prismatic joint, with the direction along the prismatic joint direction.

[0023] Preferably, in step S4, the dynamic parameters are extracted using the ADAMS / PostProcessor post-processing module.

[0024] Secondly, embodiments of the present invention provide a dynamic analysis system for a two-dimensional vibration system in a centrifugal force field, including...

[0025] Centrifuge arm, which is mounted on the centrifuge shaft. One end of the centrifuge arm is connected to the vibration table. The table and the specimen are placed on the vibration table, which is connected to the table and the specimen via a connecting rod device.

[0026] Preferably, the vibration table includes a spring constraint, a moving coil, and a sliding pair. The spring constraint is used to connect the vibration table and the moving coil. The vibration is simulated by applying a load excitation to the spring constraint. The sliding pair is attached to the moving coil and is used to constrain the moving coil to move only in the vibration direction.

[0027] Compared with the prior art, the present invention has at least the following beneficial effects:

[0028] A dynamic analysis method for a two-dimensional vibration system in a centrifugal force field is proposed. This method accurately simulates the connection between the two-dimensional shaking table and the platform, ensuring correct modeling and not affecting the dynamic simulation results, thus solving the problem of motion decoupling in the two-dimensional direction. Utilizing the adjustability of structural parameters (centrifuge arm length, specimen mass, etc.), working parameters (stiffness, damping coefficient), and motion parameters (centrifuge rotation speed, shaking table vibration frequency, etc.) in the simulation model, the motion of the two-dimensional shaking table in a centrifugal force field under different working conditions can be simulated, significantly reducing experimental research time. Simultaneously, the ADAMS simulation software is used to determine the force conditions at each important connection point, providing important reference for the design and optimization of actual experimental systems.

[0029] Furthermore, by assigning mass values ​​to each mechanism and setting connection pairs, a dynamic model of the overall centrifugal-vibration composite system was constructed in Adams software.

[0030] Furthermore, the connection relationships between the various components of the system are realistically simulated by simulating the rotation of the centrifuge, the vibration of the shaking table, and the connection relationship between the shaking table, the table surface, and the specimen.

[0031] Furthermore, by setting a rotary pair between the vibration table, linkage mechanism, table surface and specimen, the motion transmission between two-dimensional vibration tables is realistically simulated, so that vibrations in different directions can be transmitted to the table surface and specimen.

[0032] Furthermore, a drive is added to the rotary joint; a drive is added to the prismatic joint to simulate the motion of the system. The rotation of the centrifuge is simulated by adding a drive to the rotary joint; the vibration of the vibration table is simulated by adding a drive to the prismatic joint and setting the direction along the direction of the prismatic joint.

[0033] A dynamic analysis system for a two-dimensional vibration system in a centrifugal force field simplifies and connects the actual centrifuge-vibration table system.

[0034] In summary, this invention can effectively and efficiently utilize Adams software to perform simple and accurate dynamic analysis on two-dimensional vibration systems in centrifugal fields, solving the technical problem of motion decoupling of two-dimensional vibration tables in centrifugal fields. It accurately simulates the motion of two-dimensional vibration tables in centrifugal fields and can realistically reflect the dynamic characteristics of the system. It overcomes the problems of complex dynamic modeling of two-dimensional vibration systems in centrifugal fields, which requires complex analysis and derivation processes and cumbersome calculations. It can easily construct and modify actual samples or mechanisms without the need for complex mathematical models.

[0035] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0036] Figure 1 This is a flowchart of the dynamic simulation of the two-dimensional vibration system in a centrifugal force field based on ADAMS according to the present invention;

[0037] Figure 2 This is a model diagram of the composite system of the present invention;

[0038] Figure 3 This is a model diagram of the vibration table of the present invention.

[0039] Figure 4 A schematic diagram of a computer device provided in an embodiment of the present invention;

[0040] Figure 5 This is a block diagram of a chip according to an embodiment of the present invention;

[0041] Figure 6 A schematic diagram of a centrifuge-vibration table model combining radial and tangential vibrations;

[0042] Figure 7 This is a schematic diagram showing the constraint relationship between the linkage mechanism, the moving coil, and the platform.

[0043] Figure 8 Schematic diagram for setting up a rotary drive;

[0044] Figure 9 A schematic diagram for setting up vibration excitation;

[0045] Figure 10 A schematic diagram for setting up the simulation;

[0046] Figure 11 A schematic diagram of the radial displacement response of the platform and the specimen;

[0047] Figure 12 This is a schematic diagram of the tangential displacement response of the platform and the specimen;

[0048] Figure 13 This is a schematic diagram of the radial forces acting on the platform and the specimen.

[0049] Figure 14 This is a schematic diagram of the tangential forces acting on the platform and the specimen.

[0050] The components include: 1. Centrifuge arm; 2. Centrifuge shaft; 3. Vibration table; 4. Table surface and specimen; 5. Spring constraint; 6. Linkage device; 7. Moving coil; 8. Sliding pair. Detailed Implementation

[0051] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] In the description of this invention, it should be understood that the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0053] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0054] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Additionally, the character " / " in this invention generally indicates that the preceding and following objects have an "or" relationship.

[0055] It should be understood that although terms such as first, second, third, etc., may be used in the embodiments of the present invention to describe the preset range, these preset ranges should not be limited to these terms. These terms are only used to distinguish the preset ranges from one another. For example, without departing from the scope of the embodiments of the present invention, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0056] Depending on the context, the word "if" as used here can be interpreted as "when," "when," "in response to determination," or "in response to detection." Similarly, depending on the context, the phrase "if determination" or "if detection (of the stated condition or event)" can be interpreted as "when determination," "in response to determination," "when detection (of the stated condition or event)," or "in response to detection (of the stated condition or event)."

[0057] The accompanying drawings illustrate various structural schematic diagrams according to embodiments disclosed in this invention. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0058] This invention provides a dynamic analysis method for a two-dimensional vibration system in a centrifugal force field. It performs dynamic analysis on the structure of the mechanism, utilizing Adams software for simple and accurate dynamic analysis of the two-dimensional vibration system in a centrifugal force field. This method solves the technical problem of motion decoupling of a two-dimensional vibration table in a centrifugal force field, accurately simulates the motion of the two-dimensional vibration table in a centrifugal force field, and realistically reflects the dynamic characteristics of the system. It overcomes the problems of complex dynamic modeling of two-dimensional vibration systems in centrifugal force fields, requiring complex analysis and derivation processes and cumbersome calculations. It allows for easy construction and modification of actual samples or mechanisms without the need for complex mathematical models.

[0059] Please see Figure 1 The present invention provides a dynamic analysis method for a two-dimensional vibration system in a centrifugal force field, comprising the following steps:

[0060] S1. Create a three-dimensional model of the two-dimensional vibration table in the centrifugal force field in the three-dimensional software SolidWorks;

[0061] S2. Import the three-dimensional model obtained in step S1 into ADAMS to obtain the ADAMS mechanical model, and set the constraints and loads of the ADAMS mechanical model.

[0062] The specific constraints and loads of the ADAMS mechanical model are as follows:

[0063] In the ADAMS mechanical model, mass values ​​are assigned to each mechanism, and connection pairs corresponding to the actual situation are set between the mechanisms to realize the kinematic coordination between the two-dimensional shaking tables. Specifically:

[0064] S201. Set the constraint between centrifuge arm 1 and centrifuge shaft 2 as a rotary joint around centrifuge shaft 2;

[0065] S202, Set the constraint between the moving coil 7 and the vibration table base to spring constraint 5; set the constraint between the moving coil 7 and the vibration table base to sliding pair 8;

[0066] S203, the table and specimen 4 are connected to the vibration table 3 by adding a rotary joint between them and the connecting rod device 6, and the motion coordination between the vibration table 3 in two directions is achieved through the cooperation of the rotary joint.

[0067] The following is an example of a vibration table combining radial and tangential forces:

[0068] For the radial vibration table, the vibration table 3 and the connecting rod device 6 are constrained as a revolute joint, with the rotation axis perpendicular to the ground, and the connecting rod device 6 is the driven member; the table surface and specimen 4 are constrained as a revolute joint with the connecting rod device 6, with the rotation axis perpendicular to the ground, and the table surface and specimen 4 are the driven members.

[0069] For the tangential vibration table, the vibration table 3 and the connecting rod device 6 are constrained as a revolute joint, with the rotation axis perpendicular to the ground, and the connecting rod device 6 is the driven member; the table surface and specimen 4 are constrained as a revolute joint with the connecting rod device 6, with the rotation axis perpendicular to the ground, and the table surface and specimen 4 are the driven members.

[0070] S3. Establish the output dynamic parameters of the ADAMS mechanical model obtained in step S2, which are used to simulate the rotation of the centrifuge and the vibration of the vibration table.

[0071] Add a drive (rotation) to the rotary joint between centrifuge arm 1 and centrifuge shaft 2; add a drive (force) to the sliding joint 8 between moving coil 7 and vibration table base, with the direction along the sliding joint.

[0072] S4. Set the simulation time and step size, and use the ADAMS / PostProcessor post-processing module to extract the required dynamic parameters to complete the dynamic analysis.

[0073] Please see Figure 2In another embodiment of the present invention, a dynamic analysis system for a two-dimensional vibration system in a centrifugal force field is provided. This system can be used to implement the above-mentioned dynamic analysis method for a two-dimensional vibration system in a centrifugal force field. Specifically, the dynamic analysis system for a two-dimensional vibration system in a centrifugal force field includes a centrifuge arm 1, a centrifuge shaft 2, a vibration table 3, a table surface, and a specimen 4.

[0074] Centrifuge arm 1 is mounted on centrifuge shaft 2, and one end of centrifuge arm 1 is connected to vibration table 3. The table surface and specimen 4 are mounted on vibration table 3.

[0075] Please see Figure 3 The vibration table 3 includes a spring constraint 5, a connecting rod device 6, a moving coil 7, and a sliding pair 8. The spring constraint 5 is used to connect the vibration table 3 body and the moving coil 7; the sliding pair 8 is used to restrict the moving coil 7 to move only along the vibration direction.

[0076] A linkage device 6 is established between the table and specimen 4 and the vibration table 3. The table and specimen 4, the linkage device 6 and the vibration table 3 are connected by a rotary joint. The motion decoupling of the two-dimensional vibration table is achieved through the linkage device 6.

[0077] In another embodiment of the present invention, a terminal device is provided, comprising a processor and a memory. The memory stores a computer program, which includes program instructions. The processor executes the program instructions stored in the computer storage medium. The processor may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. It is the computing and control core of the terminal, suitable for implementing one or more instructions, specifically suitable for loading and executing one or more instructions to achieve a corresponding method flow or corresponding function. The processor described in this embodiment of the present invention can be used for the operation of a dynamic analysis method for a two-dimensional vibration system in a centrifugal force field, including:

[0078] Establish a three-dimensional model of a two-dimensional shaking table in a centrifugal force field; import the three-dimensional model into ADAMS to obtain the ADAMS mechanical model, and set the constraints and loads of the ADAMS mechanical model; establish the output dynamic parameters of the ADAMS mechanical model; set the simulation time and step size, extract the required dynamic parameters, and complete the dynamic analysis.

[0079] Please see Figure 4 The terminal device is a computer device. In this embodiment, the computer device 60 includes a processor 61, a memory 62, and a computer program 63 stored in the memory 62 and executable on the processor 61. When executed by the processor 61, the computer program 63 implements the fluid composition calculation method in the reservoir stimulation wellbore of this embodiment. To avoid repetition, details are omitted here. Alternatively, when executed by the processor 61, the computer program 63 implements the functions of each model / unit in the dynamic analysis system of the two-dimensional vibration system in the centrifugal force field of this embodiment. To avoid repetition, details are omitted here.

[0080] Computer device 60 can be a desktop computer, laptop, handheld computer, cloud server, or other computing device. Computer device 60 may include, but is not limited to, a processor 61 and a memory 62. Those skilled in the art will understand that... Figure 4 This is merely an example of computer device 60 and does not constitute a limitation on computer device 60. It may include more or fewer components than shown, or combine certain components, or different components. For example, computer device may also include input / output devices, network access devices, buses, etc.

[0081] The processor 61 may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor.

[0082] The memory 62 can be an internal storage unit of the computer device 60, such as a hard disk or RAM of the computer device 60. The memory 62 can also be an external storage device of the computer device 60, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc. equipped on the computer device 60.

[0083] Furthermore, the memory 62 may include both internal storage units of the computer device 60 and external storage devices. The memory 62 is used to store computer programs and other programs and data required by the computer device. The memory 62 can also be used to temporarily store data that has been output or will be output.

[0084] Please see Figure 5 The terminal device is a chip. In this embodiment, the chip 600 includes a processor 622, which may be one or more, and a memory 632 for storing computer programs executable by the processor 622. The computer program stored in the memory 632 may include one or more modules, each corresponding to a set of instructions. Furthermore, the processor 622 may be configured to execute the computer program to perform the dynamic analysis method of the two-dimensional vibration system in a centrifugal force field described above.

[0085] Additionally, chip 600 may also include a power supply component 626 and a communication component 650. The power supply component 626 can be configured to perform power management of chip 600, and the communication component 650 can be configured to enable communication of chip 600, such as wired or wireless communication. Furthermore, chip 600 may also include an input / output (I / O) interface 658. Chip 600 can operate on an operating system stored in memory 632.

[0086] In another embodiment of the present invention, a storage medium is also provided, specifically a computer-readable storage medium (memory). This computer-readable storage medium is a memory device in a terminal device used to store programs and data. It is understood that the computer-readable storage medium here can include both the built-in storage medium in the terminal device and extended storage media supported by the terminal device. The computer-readable storage medium provides storage space that stores the terminal's operating system. Furthermore, this storage space also stores one or more instructions suitable for loading and execution by a processor. These instructions can be one or more computer programs (including program code). It should be noted that the computer-readable storage medium here can be high-speed RAM or non-volatile memory, such as at least one disk storage device.

[0087] One or more instructions stored in a computer-readable storage medium can be loaded and executed by a processor to implement the corresponding steps of the dynamic analysis method for a two-dimensional vibration system in a centrifugal force field in the above embodiments; one or more instructions in the computer-readable storage medium are loaded and executed by the processor in the following steps:

[0088] Establish a three-dimensional model of a two-dimensional shaking table in a centrifugal force field; import the three-dimensional model into ADAMS to obtain the ADAMS mechanical model, and set the constraints and loads of the ADAMS mechanical model; establish the output dynamic parameters of the ADAMS mechanical model; set the simulation time and step size, extract the required dynamic parameters, and complete the dynamic analysis.

[0089] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0090] Example

[0091] Step 1: Create a three-dimensional model of the centrifuge-two-dimensional vibration table.

[0092] Step 2: Establish a multibody dynamics model of the two-dimensional vibration system in the centrifugal force field.

[0093] Import the 3D model established in step 1 into ADAMS, set the mass of each component, and thus establish a multibody dynamics model of a 2D vibration system in a centrifugal force field, such as... Figure 6 As shown;

[0094] The quality settings are as follows:

[0095] part Mass (kg) centrifuge shaft 5000 centrifuge arm 230 Vibration table 3416 dynamic 156 Linkage device 5 work surface and test piece 600 hanging basket 1607 counterweight 5409

[0096] Step 3, Add motion and constraint relationships

[0097] Add motion and constraint relationships between the various components of the centrifuge-two-dimensional shaking table three-dimensional model, such as... Figure 7 As shown, the remaining constraints are the same as... Figure 8 For the radial vibration table, the vibration table 3 and the connecting rod device 6 are constrained as a revolute joint, with the rotation axis perpendicular to the ground, and the connecting rod device 6 is the driven member; the table surface and specimen 4 are constrained as a revolute joint with the connecting rod device 6, with the rotation axis perpendicular to the ground, and the table surface and specimen 4 are the driven members.

[0098] For the tangential vibration table, the vibration table 3 and the connecting rod device 6 are constrained as a revolute joint, with the rotation axis perpendicular to the ground, and the connecting rod device 6 is the driven member; the table surface and specimen 4 are constrained as a revolute joint with the connecting rod device 6, with the rotation axis perpendicular to the ground, and the table surface and specimen 4 are the driven members.

[0099] Step 4, simulated motion

[0100] Simulations are performed by applying rotational and vibrational excitations to a multibody dynamics model of a two-dimensional vibrating system in a centrifugal force field, such as... Figure 8 , Figure 9 and Figure 10 As shown, Figure 8 The specific operation is as follows: Force—Create Force—Select two objects in the direction of motion, and select the vibration table and the moving coil in turn. By setting the driving force function: IF(time-10:0,0,IE(time-15:100000*sin(2*pi*l0*time),0,0)), the vibration drive is set to simulate the motion of the vibration table.

[0101] Figure 9 The specific operation is as follows: Drive—Kinematic Pair Drive—Rotary Drive. Select the rotary pair between the centrifuge arm and the centrifuge shaft, and apply the rotary drive. The function is: IF(time-10:0.51*time5.1,F(time-15:5.15.1-0.204*time*time+6.12*time-40.8)). In order to make the simulation more realistic, 0-10s is set as the uniform acceleration process, 10-15s as the uniform rotation process, and 15-20s as the deceleration segment, so as to simulate the rotational motion of the centrifuge.

[0102] Figure 10 The specific operation is as follows: Simulation—Simulation Analysis, set the simulation time to 20s, and the simulation step size to 0.001s.

[0103] Step 5, Result Extraction:

[0104] Extract the time-domain vibration response curves of the platform and the specimen, such as... Figure 11 , Figure 12 , Figure 13 and Figure 14 As shown in the figure, this method can realistically and effectively simulate the motion of a two-dimensional shaking table in a centrifugal force field, and can truly reflect the dynamic characteristics of the system.

[0105] In summary, the present invention provides a dynamic analysis method and system for a two-dimensional vibration system in a centrifugal force field, which can accurately simulate the motion of a two-dimensional vibration table in a centrifugal force field and truly reflect the dynamic characteristics of the system. It overcomes the problems of existing dynamic modeling of two-dimensional vibration systems in a centrifugal force field being complex, requiring complicated analysis and derivation processes and cumbersome calculations. It can easily construct and modify actual samples or mechanisms without the need for complex mathematical models.

[0106] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0107] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0108] 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 invention 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 implementations should not be considered beyond the scope of this invention.

[0109] In the embodiments provided by this invention, it should be understood that the disclosed devices / terminals and methods can be implemented in other ways. For example, the device / terminal embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0110] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0111] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0112] If the integrated module / unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random-access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc. It should be noted that the content included in the computer-readable medium can be appropriately added or removed according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electrical carrier signals and telecommunication signals.

[0113] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0114] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0115] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0116] The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solution based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. A method for dynamic analysis of a two-dimensional vibration system in a centrifugal force field, characterized in that, Includes the following steps: S1. Use SolidWorks to create a three-dimensional model of a two-dimensional vibration table in a centrifugal force field; S2. Import the 3D model obtained in step S1 into ADAMS to obtain the ADAMS mechanical model. Set the constraints and loads of the ADAMS mechanical model, assign mass values ​​to each mechanism in the ADAMS mechanical model, and set connection pairs between each mechanism that correspond to the actual situation to realize the kinematic coordination between the two-dimensional shaking tables. Specifically: S201. Set the constraint between the centrifuge arm and the centrifuge shaft as a rotary joint about the centrifuge shaft; S202. Set the constraint between the moving coil and the vibration table base to a spring constraint; set the constraint between the moving coil and the vibration table base to a sliding pair; S203. Rotary pairs are added between the vibration table and the linkage device, and between the table surface and the specimen and the linkage device, respectively, to connect them. The movement between the vibration tables in two directions is achieved through the cooperation of the rotary pairs. For a radial vibration table, the constraint between the vibration table and the linkage is set as a rotary joint, with the rotation axis perpendicular to the ground, and the linkage is the driven member; The constraint between the platform and the specimen and the linkage device is set as a revolute joint, with the axis of rotation perpendicular to the ground, and the platform and the specimen as driven members; For a tangential vibration table, the constraint between the vibration table and the linkage is set as a revolute joint, with the axis of rotation perpendicular to the ground, and the linkage is the driven member; The constraint between the platform and the specimen and the linkage device is set as a revolute joint, with the axis of rotation perpendicular to the ground, and the platform and the specimen as driven members; S3. Establish the output dynamic parameters of the ADAMS mechanical model obtained in step S2, add a drive to the rotary joint; add a drive along the direction of the prismatic joint. S4. Set the simulation time and step size, and use the ADAMS / PostProcessor post-processing module to extract the required dynamic parameters to complete the dynamic analysis.

2. A dynamic analysis system for a two-dimensional vibration system in a centrifugal force field, characterized in that, The dynamic analysis method of a two-dimensional vibration system in a centrifugal force field according to claim 1 includes a centrifuge arm (1), which is set on a centrifuge shaft (2). One end of the centrifuge arm (1) is connected to a vibration table (3). The table and the specimen (4) are set on the vibration table (3). The vibration table (3) is connected to the table and the specimen (4) through a connecting rod device (6).

3. The dynamic analysis system for a two-dimensional vibration system in a centrifugal force field according to claim 2, characterized in that, The vibration table (3) includes a spring constraint (5), a moving coil (7) and a sliding pair (8). The spring constraint (5) is used to connect the vibration table (3) and the moving coil (7). The vibration is simulated by applying a load excitation to the spring constraint (5). The sliding pair (8) is attached to the moving coil (7) and is used to constrain the moving coil (7) to move only in the vibration direction.

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