A chassis vibration analysis test method, system, device and medium

Abstract

The specification discloses a case vibration analysis test method, system, device and medium, the method obtains three-dimensional geometric data of a to-be-detected case and constructs a three-dimensional geometric model, analyzes and extracts component information and geometric topology information from the three-dimensional geometric model, calls a preset material database to assign corresponding material physical parameters to each component of the three-dimensional geometric model, generates test working condition setting data, calls a built-in solver according to the material physical parameters and the geometric topology information of the component and the test working condition setting data, performs structural dynamics simulation calculation, solves a structural dynamics equation to obtain simulation response data of the to-be-detected case, generates a vibration response atlas according to the simulation response data, and generates a model optimization suggestion, realizing full-process automatic test of case vibration resistance, and the method has the advantages of high test precision, high flexibility and fast optimization.

Description

Technical Field

[0001] This invention relates to the field of structural testing technology, and more specifically, to a method, system, equipment, and medium for analyzing and testing chassis vibration. Background Technology

[0002] With the widespread application of servers and high-performance computing devices in data centers, cloud computing platforms, and artificial intelligence training, the stability, heat dissipation, and vibration resistance of the chassis structure play a decisive role in the overall reliability of the equipment. Especially in high-density server racks, edge computing nodes, and military / industrial server applications under harsh transportation conditions, the chassis is subjected to vibration and shock from the environment or internal components during operation or handling. Insufficient vibration resistance of the chassis structure can lead to hardware damage or data loss, poor contact causing system downtime, and structural resonance amplifying fan vibration, increasing noise, and affecting heat dissipation efficiency. Traditional chassis vibration analysis methods mainly rely on physical prototype testing, such as performing acceleration and frequency scanning tests on a vibration table and collecting data using sensors. This method is inefficient, costly, lacks flexibility, cannot quickly guide design optimization, and cannot provide detailed analysis of the stress state of different components inside the chassis.

[0003] Therefore, there is an urgent need to study a chassis vibration analysis and testing method to achieve accurate testing and efficient optimization of the chassis's vibration resistance performance. Summary of the Invention

[0004] This specification provides a chassis vibration analysis and testing method, system, equipment, and medium to overcome at least one technical problem existing in related technologies.

[0005] According to a first aspect of the embodiments of this specification, a chassis vibration analysis test method is provided, comprising:

[0006] The three-dimensional geometric data of the chassis to be tested is acquired to construct a three-dimensional geometric model of the chassis to be tested. The three-dimensional geometric model is parsed to extract component information and geometric topology information. A preset material database is called to assign corresponding material physical parameters to each component of the three-dimensional geometric model. The component information includes component name and number of components. The geometric topology information includes node coordinates and component assembly relationship. The material physical parameters include density, elastic modulus and Poisson's ratio.

[0007] Obtain the vibration load conditions for the vibration test of the chassis to be tested, and generate test condition setting data based on the vibration load conditions. The vibration load conditions include vibration direction, frequency range, acceleration amplitude and waveform type.

[0008] Based on the material physical parameters and geometric topology information of the components in the three-dimensional geometric model, as well as the test condition setting data, the built-in solver is invoked to perform structural dynamics simulation calculations and solve the structural dynamics equations to obtain the simulation response data of the chassis under test.

[0009] Based on the simulation response data, the vibration response spectrum of the chassis under test is generated based on the displacement, stress, and acceleration of each node in the three-dimensional geometric model. The vibration analysis results of the chassis under test are obtained based on the vibration response spectrum.

[0010] Optionally, the step of calling the built-in solver to perform structural dynamics simulation calculations based on the material physical parameters and geometric topology information of the components in the three-dimensional geometric model and the test condition setting data, and solving the structural dynamics equations to obtain the simulation response data of the chassis under test, includes:

[0011] Based on the three-dimensional geometric model of the chassis to be tested, finite element meshing is performed using tetrahedral or hexahedral elements;

[0012] Modal analysis is performed on the meshed model to solve the structural dynamics equations. Based on the results of the modal analysis, harmonic response analysis is performed within the frequency range set by the vibration load conditions to calculate the simulation response data.

[0013] Optionally, the step of performing finite element mesh generation using tetrahedral or hexahedral elements based on the three-dimensional geometric model of the chassis to be tested includes:

[0014] Based on the three-dimensional geometric model of the chassis to be tested, finite element mesh generation is performed using tetrahedral or hexahedral elements. The mesh generation formula is as follows:

[0015]

[0016] in, V represents the optimal element side length, V represents the model volume, and N represents the number of target elements.

[0017] Optionally, the steps of performing modal analysis on the divided mesh model, solving the structural dynamics equations, and based on the results of the modal analysis, performing harmonic response analysis within the frequency range set by the vibration load conditions to calculate the simulation response data include:

[0018] Modal analysis was performed on the meshed model to solve the structural dynamics equations:

[0019]

[0020] in, For the quality matrix, Here is the damping matrix. Here is the stiffness matrix. It is a displacement vector. External load vector;

[0021] Modal analysis for solving eigenvalue problems:

[0022]

[0023] in, Here is the stiffness matrix. For the quality matrix, For the natural frequency, The modal shape vector;

[0024] Output the first 10 modal frequencies and mode shapes to determine if they are close to the frequencies of the external vibration source.

[0025] Within the known frequency range of the external load, the steady-state response of the structure is calculated as follows:

[0026]

[0027] The simulation response data is obtained.

[0028] Optionally, the step of generating a vibration response spectrum of the chassis under test based on the simulation response data, displacement, stress, and acceleration of each node in the three-dimensional geometric model, and obtaining the vibration analysis results of the chassis under test based on the vibration response spectrum includes:

[0029] Based on the simulation response data, a vibration response map of the chassis to be tested is generated based on the displacement, stress, and acceleration of each node in the three-dimensional geometric model. The vibration response map includes a displacement distribution map, a stress distribution map, and key node curves.

[0030] Based on the displacement distribution map, the maximum displacement of the node at the resonant frequency is obtained and compared with the displacement at the non-resonant frequency. Warnings are issued for risk areas that exceed the preset threshold. Based on the stress distribution map and the key node curve, and based on the pre-stored rule base, structural reinforcement optimization suggestions for the risk areas are generated. The optimization suggestions include adding stiffening plates in the risk areas or replacing them with materials with higher elastic modulus.

[0031] If the simulation response data shows that the natural frequency of the enclosure falls within the set frequency range, a resonance risk warning will be generated.

[0032] Based on the optimization suggestions and resonance risk warnings, the vibration analysis results of the chassis to be tested are obtained. The three-dimensional geometric model of the chassis is iteratively modified and re-simulated according to the vibration analysis results until the simulation response data and vibration analysis results meet the design requirements.

[0033] According to a second aspect of the embodiments of this specification, a chassis vibration analysis and testing system is provided, including a model generation module, a working condition setting module, a vibration testing module, and an optimization analysis module, wherein...

[0034] The model generation module is configured to acquire the three-dimensional geometric data of the chassis to be tested to construct a three-dimensional geometric model of the chassis to be tested, analyze the three-dimensional geometric model to extract component information and geometric topology information, and call a preset material database to assign corresponding material physical parameters to each component of the three-dimensional geometric model. The component information includes component name and number of components, the geometric topology information includes node coordinates and component assembly relationship, and the material physical parameters include density, elastic modulus and Poisson's ratio.

[0035] The operating condition setting module is configured to acquire the vibration load conditions for the vibration test of the chassis to be tested, and generate test operating condition setting data based on the vibration load conditions. The vibration load conditions include vibration direction, frequency range, acceleration amplitude and waveform type.

[0036] The vibration testing module is configured to call the built-in solver to perform structural dynamics simulation calculations based on the material physical parameters and geometric topology information of the components in the three-dimensional geometric model and the test condition setting data, and to solve the structural dynamics equations to obtain the simulation response data of the chassis to be tested.

[0037] The optimization analysis module is configured to generate a vibration response spectrum of the chassis under test based on the simulation response data and the displacement, stress, and acceleration of each node in the three-dimensional geometric model, and to obtain the vibration analysis results of the chassis under test based on the vibration response spectrum.

[0038] Optionally, the vibration testing module includes a mesh generation unit and a modal calculation unit, wherein...

[0039] The mesh generation unit is configured to perform finite element mesh generation using tetrahedral or hexahedral elements based on the three-dimensional geometric model of the chassis to be tested.

[0040] The modal calculation unit is configured to perform modal analysis on the divided mesh model, solve the structural dynamics equations, and perform harmonic response analysis within the frequency range set by the vibration load conditions based on the results of the modal analysis, thereby calculating the simulation response data.

[0041] Optionally, the optimization analysis module includes a spectrum generation unit, a suggestion generation unit, a resonance early warning unit, and a model optimization unit, wherein...

[0042] The spectrum generation unit is configured to generate a vibration response spectrum of the chassis to be tested based on the simulation response data and the displacement, stress, and acceleration of each node of the three-dimensional geometric model. The vibration response spectrum includes a displacement distribution map, a stress distribution map, and key node curves.

[0043] The suggestion generation unit is configured to obtain the maximum displacement of the node at the resonant frequency based on the displacement distribution map, compare it with the displacement at the non-resonant frequency, issue a warning for risk areas that exceed a preset threshold, and generate structural reinforcement optimization suggestions for the risk areas based on the stress distribution map and key node curves and a pre-stored rule base. The optimization suggestions include adding reinforcing ribs in the risk areas or replacing them with materials with higher elastic modulus.

[0044] The resonance early warning unit is configured to generate a resonance risk warning if the simulation response data shows that the natural frequency of the chassis falls within a set frequency range.

[0045] The model optimization unit is configured to obtain the vibration analysis results of the chassis to be tested based on the optimization suggestions and resonance risk warnings, iteratively modify the three-dimensional geometric model of the chassis based on the vibration analysis results and re-simulate until the simulation response data and vibration analysis results meet the design requirements.

[0046] According to a third aspect of the embodiments of this specification, a computing device is provided, including a storage device and a processor, the storage device being used to store a computer program, and the processor running the computer program to cause the computing device to perform the steps of the chassis vibration analysis test method described above.

[0047] According to a fourth aspect of the embodiments of this specification, a storage medium is provided that stores a computer program used in the computing device, which, when executed by a processor, implements the steps of the chassis vibration analysis test method.

[0048] The beneficial effects of the embodiments in this specification are as follows:

[0049] This specification provides an embodiment of a chassis vibration analysis and testing method, system, equipment, and medium. This method acquires three-dimensional structural and physical parameters, flexibly sets vibration direction and amplitude, generates vibration response maps through structural dynamics simulation calculations, and generates model optimization suggestions and risk warnings. It achieves full automation of the chassis vibration performance testing and design process, eliminating the need for cross-platform data transfer and manual data import / export, saving significant design iteration time. Physical parameters and geometric data can be directly accessed, avoiding accuracy loss. The vibration response map can quickly locate weak points, facilitating engineers to optimize designs. It can simulate various vibration load types, enabling rapid and comprehensive vibration analysis during the chassis design phase, and outputting intuitive vibration response maps. It is adaptable to different application scenarios and represents a significant advancement.

[0050] The innovative aspects of the embodiments in this specification include:

[0051] 1. In this specification, the geometric information and physical parameters of the chassis structure are directly obtained from the 3D modeling environment. The 3D modeling module and the vibration analysis module are integrated in the same software platform to realize the direct calling of modeling data and the automatic setting of vibration conditions. This avoids data loss caused by cross-platform file conversion and is one of the innovative points of the embodiments of this specification.

[0052] 2. In this specification, the vibration condition setting supports the setting of vibration direction for single-axis, dual-axis, tri-axis and multi-axis combinations. It allows users to input acceleration, frequency range, waveform type (sine, random, impact, etc.) and amplitude, making the vibration load setting flexible and capable of simulating complex conditions such as multi-directional, multi-frequency and random vibration. This is one of the innovative points of the embodiments in this specification.

[0053] 3. In this specification, the method of finite element mesh generation and solution is adopted. The mesh density is automatically optimized according to the geometric complexity, and the integrated finite element solver is called to perform modal analysis and harmonic response analysis, which greatly improves the analysis efficiency and accuracy. This is one of the innovative points of the embodiments in this specification.

[0054] 4. In this specification, the vibration response spectrum is automatically generated after calculation based on the displacement, stress, acceleration and other data of each node. It covers the entire chassis and key components, and generates a color distribution map, frequency response curve and time domain response curve of key nodes. Then, the vibration response spectrum is analyzed to give risk warning and optimization suggestions, which is one of the innovative points of the embodiments of this specification. Attached Figure Description

[0055] To more clearly illustrate the technical solutions in the embodiments or related technologies of this specification, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0056] Figure 1 This is a flowchart illustrating a chassis vibration analysis and testing method provided in one embodiment of this specification.

[0057] Figure 2 This is a schematic diagram of the structure of a chassis vibration analysis and testing system provided in one embodiment of this specification;

[0058] Figure 3 This is a schematic diagram of the structure of a computing device provided in one embodiment of this specification;

[0059] Figure 4 This is a schematic diagram of the structure of a storage medium provided in one embodiment of this specification. Detailed Implementation

[0060] The technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0061] It should be noted that the terms "comprising" and "having," and any variations thereof, in the embodiments and drawings of this specification are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0062] This specification discloses a chassis vibration analysis and testing method, system, equipment, and medium, which are described in detail below.

[0063] Figure 1 This is a flowchart illustrating a chassis vibration analysis and testing method provided in one embodiment of this specification. Figure 1 As shown, a chassis vibration analysis and testing method includes:

[0064] S110. Obtain the three-dimensional geometric data of the chassis to be tested to construct a three-dimensional geometric model of the chassis to be tested, and analyze the three-dimensional geometric model to extract component information and geometric topology information.

[0065] Create a 3D geometric model of the chassis and its internal components, and output the overall geometry, dimensions, and assembly relationships of the chassis and its parts. It supports parametric modeling and allows for quick adjustment of design parameters such as plate thickness, hole diameter, and support structure.

[0066] The system calls a preset material database to assign corresponding material physical parameters to each component of the 3D geometric model. The component information includes the component name and the number of components. The geometric topology information includes node coordinates and component assembly relationships. The material physical parameters include density, elastic modulus, and Poisson's ratio.

[0067] Assign material properties to the chassis structure and its components, including density ρ, elastic modulus E, Poisson's ratio μ, damping coefficient η, etc. The data source can be automatically retrieved from the material database or customized by the user. Different material properties can be used for different components, such as aluminum alloy shell, stainless steel support beam, and ABS plastic panel.

[0068] S120. Obtain the vibration load conditions for the vibration test of the chassis to be tested, and generate test condition setting data based on the vibration load conditions. The vibration load conditions include vibration direction, frequency range, acceleration amplitude and waveform type.

[0069] The purpose of this step is to define the vibration load conditions that the chassis may encounter in practical applications. Parameters include: vibration direction (X, Y, Z axes and their combinations), frequency range, acceleration amplitude, and waveform type, including sine waves, random vibration, and shock waves. Furthermore, it supports combined settings for various operating conditions, such as superposition analysis of transportation vibration and fan resonance. Vibration condition settings support single-axis, dual-axis, tri-axis, and multi-axis combinations of vibration direction settings, allowing users to input acceleration, frequency range, waveform type, and amplitude.

[0070] S130. Based on the material physical parameters and geometric topology information of the components in the three-dimensional geometric model and the test condition setting data, the built-in solver is called to perform structural dynamics simulation calculations and solve the structural dynamics equations to obtain the simulation response data of the chassis to be tested.

[0071] Finite element meshes are generated based on geometric and material information, and modal analysis, harmonic response analysis, and other calculations are performed. The core of this process is to solve the structural dynamics equations based on the finite element method, and output data such as nodal displacement, acceleration, stress distribution, and modal shape.

[0072] In a specific embodiment, the step S130, which involves calling the built-in solver to perform structural dynamics simulation calculations based on the material physical parameters and geometric topology information of the components in the three-dimensional geometric model and the test condition setting data, and solving the structural dynamics equations to obtain the simulation response data of the chassis under test, includes:

[0073] S132. Based on the three-dimensional geometric model of the chassis to be tested, perform finite element mesh generation using tetrahedral or hexahedral elements.

[0074] The mesh generation formula is:

[0075]

[0076] in, V represents the optimal element side length, V represents the model volume, and N represents the number of target elements.

[0077] S134. Perform modal analysis on the divided mesh model, solve the structural dynamics equations, and based on the results of the modal analysis, perform harmonic response analysis within the frequency range set by the vibration load conditions to calculate the simulation response data.

[0078] Modal analysis was performed on the meshed model to solve the structural dynamics equations:

[0079]

[0080] in, For the quality matrix, Here is the damping matrix. Here is the stiffness matrix. It is a displacement vector. External load vector;

[0081] Modal analysis for solving eigenvalue problems:

[0082]

[0083] in, Here is the stiffness matrix. For the quality matrix, For the natural frequency, The modal shape vector;

[0084] Output the first 10 modal frequencies and mode shapes to determine if they are close to the frequencies of the external vibration source.

[0085] Within the known frequency range of the external load, the steady-state response of the structure is calculated as follows:

[0086]

[0087] The simulation response data is obtained.

[0088] S140. Based on the simulation response data, and the displacement, stress, and acceleration of each node in the three-dimensional geometric model, a vibration response spectrum of the chassis to be tested is generated. The vibration analysis results of the chassis to be tested are obtained based on the vibration response spectrum.

[0089] The calculation results are converted into intuitive forms such as color distribution maps, frequency response curves, and displacement-time curves, supporting magnified display of key nodes at specific frequencies to facilitate the detection of local resonances. Based on the analysis results, areas of vibration stress concentration are automatically identified, and suggestions for structural reinforcement or material replacement are proposed. These suggestions can be directly fed back into the 3D modeling module for rapid iterative optimization.

[0090] In a specific embodiment, step S140, which involves generating a vibration response spectrum of the chassis under test based on the simulation response data and the displacement, stress, and acceleration of each node in the three-dimensional geometric model, and obtaining the vibration analysis results of the chassis under test based on the vibration response spectrum, includes:

[0091] S142. Based on the simulation response data, and using the displacement, stress, and acceleration of each node in the three-dimensional geometric model, a vibration response map of the chassis under test is generated. The vibration response map includes a displacement distribution map, a stress distribution map, and key node curves. The displacement color distribution map highlights high displacement areas. The stress map indicates the stress levels at the interfaces of components in different locations.

[0092] S144. Based on the displacement distribution diagram, obtain the maximum displacement of the node at the resonant frequency and compare it with the displacement at the non-resonant frequency. Issue a warning for risk areas that exceed the preset threshold. Based on the stress distribution diagram and key node curves, and based on the pre-stored rule base, generate structural reinforcement optimization suggestions for the risk areas. The optimization suggestions include adding reinforcing ribs in the risk areas or replacing them with materials with higher elastic modulus.

[0093] S146. If the simulation response data shows that the natural frequency of the chassis falls within the set frequency range, a resonance risk warning will be generated.

[0094] S148. Based on the optimization suggestions and resonance risk warnings, obtain the vibration analysis results of the chassis to be tested. Iteratively modify the three-dimensional geometric model of the chassis based on the vibration analysis results and re-simulate until the simulation response data and vibration analysis results meet the design requirements.

[0095] The methods described in this specification support vibration analysis in various application scenarios, including but not limited to: vibration simulation during transportation: combining random vibration spectra to evaluate the impact of packaging design on the vibration resistance of the chassis; fan resonance analysis: simulating resonance peaks caused by fan operating frequency to assist in fan selection and layout; earthquake and shock response: analyzing the impact of seismic waves in the computer room on the chassis structure to improve seismic design; long-term fatigue analysis: combining vibration conditions to predict the fatigue life of key chassis components, with good adaptability to multiple scenarios.

[0096] Figure 2 This is a schematic diagram of a chassis vibration analysis and testing system provided in one embodiment of this specification. Figure 2 As shown, a chassis vibration analysis and testing system 200 includes a model generation module 210, a working condition setting module 220, a vibration testing module 230, and an optimization analysis module 240, wherein...

[0097] The model generation module 210 is configured to acquire the three-dimensional geometric data of the chassis to be tested to construct a three-dimensional geometric model of the chassis to be tested, analyze the three-dimensional geometric model to extract component information and geometric topology information, and call a preset material database to assign corresponding material physical parameters to each component of the three-dimensional geometric model. The component information includes component name and number of components, the geometric topology information includes node coordinates and component assembly relationship, and the material physical parameters include density, elastic modulus and Poisson's ratio.

[0098] The operating condition setting module 220 is configured to acquire the vibration load conditions for the vibration test of the chassis to be tested, and generate test operating condition setting data based on the vibration load conditions. The vibration load conditions include vibration direction, frequency range, acceleration amplitude and waveform type.

[0099] The vibration testing module 230 is configured to call the built-in solver to perform structural dynamics simulation calculations based on the material physical parameters and geometric topology information of the components in the three-dimensional geometric model and the test condition setting data, and to solve the structural dynamics equations to obtain the simulation response data of the chassis to be tested.

[0100] The optimization analysis module 240 is configured to generate a vibration response spectrum of the chassis to be tested based on the simulation response data and the displacement, stress, and acceleration of each node of the three-dimensional geometric model, and to obtain the vibration analysis results of the chassis to be tested based on the vibration response spectrum.

[0101] The vibration testing module 230 includes a mesh generation unit and a modal calculation unit, wherein...

[0102] The mesh generation unit is configured to perform finite element mesh generation using tetrahedral or hexahedral elements based on the three-dimensional geometric model of the chassis to be tested.

[0103] The modal calculation unit is configured to perform modal analysis on the divided mesh model, solve the structural dynamics equations, and perform harmonic response analysis within the frequency range set by the vibration load conditions based on the results of the modal analysis, thereby calculating the simulation response data.

[0104] The optimization analysis module 240 includes a spectrum generation unit, a suggestion generation unit, a resonance early warning unit, and a model optimization unit, wherein...

[0105] The spectrum generation unit is configured to generate a vibration response spectrum of the chassis to be tested based on the simulation response data and the displacement, stress, and acceleration of each node of the three-dimensional geometric model. The vibration response spectrum includes a displacement distribution map, a stress distribution map, and key node curves.

[0106] The suggestion generation unit is configured to obtain the maximum displacement of the node at the resonant frequency based on the displacement distribution map, compare it with the displacement at the non-resonant frequency, issue an early warning for risk areas that exceed a preset threshold, and generate structural reinforcement optimization suggestions for the risk areas based on the stress distribution map and key node curves and a pre-stored rule base. The optimization suggestions include adding reinforcing ribs in the risk areas or replacing them with materials with higher elastic modulus.

[0107] The resonance early warning unit is configured to generate a resonance risk warning if the simulation response data shows that the natural frequency of the chassis falls within a set frequency range.

[0108] The model optimization unit is configured to obtain the vibration analysis results of the chassis to be tested based on the optimization suggestions and resonance risk warnings, iteratively modify the three-dimensional geometric model of the chassis based on the vibration analysis results and re-simulate until the simulation response data and vibration analysis results meet the design requirements.

[0109] Figure 3 This is a schematic diagram of the structure of a computing device provided in one embodiment of this specification. Figure 3 As shown, a computing device 300 includes a storage device 310 and a processor 320. The storage device 310 stores a computer program, and the processor 320 runs the computer program to enable the computing device 300 to perform the steps of the chassis vibration analysis test method described above.

[0110] Figure 4 This is a schematic diagram of the structure of a storage medium provided in one embodiment of this specification. For example... Figure 4 As shown, a storage medium 400 stores a computer program 410 used in the computing device, which, when executed by a processor, implements the steps of the chassis vibration analysis test method.

[0111] In summary, the embodiments of this specification provide a chassis vibration analysis and testing method, system, equipment, and medium. This method achieves full-process automation and efficient integration from modeling, vibration condition setting, finite element solution to vibration response spectrum output, which greatly improves the efficiency and accuracy of chassis structure vibration resistance design, significantly reduces R&D costs and risks, and has broad industrial application value.

[0112] Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of one embodiment, and the modules or processes shown in the drawings are not necessarily essential for implementing the present invention.

[0113] Those skilled in the art will understand that the modules in the apparatus of the embodiments can be distributed in the apparatus of the embodiments as described in the embodiments, or they can be located in one or more devices different from this embodiment with corresponding changes. The modules of the above embodiments can be combined into one module, or they can be further divided into multiple sub-modules.

[0114] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method of analyzing a vibration of a cabinet, the method comprising: acquiring a vibration signal of the cabinet; and determining a frequency of the vibration signal. The method comprises the following steps: acquiring three-dimensional geometric data of a to-be-detected case so as to construct a three-dimensional geometric model of the to-be-detected case, analyzing the three-dimensional geometric model to extract component information and geometric topology information, calling a preset material database to assign corresponding material physical parameters to each component of the three-dimensional geometric model, the component information comprising a component name and a component number, the geometric topology information comprising node coordinates and component assembly relationships, and the material physical parameters comprising density, elastic modulus and Poisson's ratio; acquiring a vibration load condition of a vibration test of the to-be-detected case, and generating test working condition setting data according to the vibration load condition, the vibration load condition comprising a vibration direction, a frequency range, an acceleration amplitude and a waveform type; calling an embedded solver according to the material physical parameters and the geometric topology information of the components of the three-dimensional geometric model and the test working condition setting data, performing structural dynamics simulation calculation, and solving a structural dynamics equation to obtain simulation response data of the to-be-detected case; generating a vibration response atlas of the to-be-detected case based on the displacement, stress and acceleration of each node of the three-dimensional geometric model according to the simulation response data, the vibration response atlas comprising a displacement distribution graph, a stress distribution graph and a key node curve; comparing the maximum displacement of a node at a resonance frequency with the displacement at a non-resonance frequency according to the displacement distribution graph, and performing early warning on a risk area that exceeds a preset threshold; and generating a structural reinforcement optimization suggestion for the risk area based on a pre-stored rule library according to the stress distribution graph and the key node curve, the optimization suggestion comprising adding a reinforcing rib plate to the risk area or replacing the risk area with a material having a higher elastic modulus; generating a resonance risk early warning prompt if the simulation response data shows that the natural frequency of the case falls within a set frequency range; obtaining a vibration analysis result of the to-be-detected case according to the optimization suggestion and the resonance risk prompt, iteratively modifying the three-dimensional geometric model of the case and re-simulating according to the vibration analysis result until the simulation response data and the vibration analysis result meet design requirements.

2. The method of claim 1, wherein, The step of calling an embedded solver according to the material physical parameters and the geometric topology information of the components of the three-dimensional geometric model and the test working condition setting data, performing structural dynamics simulation calculation, and solving a structural dynamics equation to obtain simulation response data of the to-be-detected case comprises the following steps: performing finite element grid division on the three-dimensional geometric model of the to-be-detected case by using tetrahedral elements or hexahedral elements; performing modal analysis on the divided grid model, solving a structural dynamics equation, and performing harmonic response analysis in a frequency range set by the vibration load condition based on the result of the modal analysis to calculate the simulation response data.

3. The method of claim 2, wherein, The step of performing finite element grid division on the three-dimensional geometric model of the to-be-detected case by using tetrahedral elements or hexahedral elements comprises the following steps: performing finite element grid division on the three-dimensional geometric model of the to-be-detected case by using tetrahedral elements or hexahedral elements, and the grid division formula is: wherein, is the optimal element edge length, V is the model volume, and N is the number of element targets.

4. The method of claim 2, wherein, The step of performing modal analysis on the divided grid model, solving a structure dynamics equation, and performing harmonic response analysis in a frequency range set by the vibration load condition based on a result of the modal analysis to calculate simulation response data comprises: Performing modal analysis on the divided grid model, solving a structure dynamics equation: wherein, is a mass matrix, is a damping matrix, is a stiffness matrix, is a displacement vector, is an external load vector; Modal analysis solves an eigenvalue problem: wherein, is the stiffness matrix, is the mass matrix, is the natural frequency, is the modal shape vector; Output the first 10 modal frequencies and modes, and determine whether they are close to the frequency of the external vibration source; When the frequency range of the known external load is known, the steady-state response of the structure is calculated as: Get simulation response data.

5. A machine enclosure vibration analysis test system, comprising: The model generation module, the working condition setting module, the vibration test module, and the optimization analysis module are included, wherein The model generation module is configured to obtain three-dimensional geometric data of the to-be-detected case to construct a three-dimensional geometric model of the to-be-detected case, analyze the three-dimensional geometric model to extract component information and geometric topology information, and call a preset material database to assign corresponding material physical parameters to each component of the three-dimensional geometric model. The component information includes component name and component number, the geometric topology information includes node coordinates and component assembly relationship, and the material physical parameters include density, elastic modulus, and Poisson's ratio. The working condition setting module is configured to obtain a vibration load condition of a vibration test of the to-be-detected case, and generate test working condition setting data according to the vibration load condition. The vibration load condition includes vibration direction, frequency range, acceleration amplitude, and waveform type. The vibration test module is configured to call a built-in solver to perform structure dynamics simulation calculation according to the material physical parameters and geometric topology information of the components of the three-dimensional geometric model and the test working condition setting data, solve a structure dynamics equation to obtain simulation response data of the to-be-detected case. The optimization analysis module is configured to generate a vibration response atlas of the to-be-detected case based on the displacement, stress, and acceleration of each node of the three-dimensional geometric model according to the simulation response data. The vibration response atlas includes a displacement distribution map, a stress distribution map, and a key node curve. According to the displacement distribution map, the maximum displacement of the node at the resonance frequency is obtained and compared with the displacement at the non-resonance frequency. The risk area exceeding the preset threshold is warned. According to the stress distribution map and the key node curve, a structure reinforcement optimization suggestion for the risk area is generated based on a pre-stored rule library. The optimization suggestion includes adding a reinforcing rib plate in the risk area or replacing it with a material with higher elastic modulus. If the simulation response data shows that the natural frequency of the case falls within the set frequency range, a resonance risk warning prompt is generated. The vibration analysis result of the to-be-detected case is obtained according to the optimization suggestion and the resonance risk prompt. The three-dimensional geometric model of the case is iteratively modified and simulated again according to the vibration analysis result until the simulation response data and the vibration analysis result meet the design requirements.

6. The system of claim 5, wherein, The vibration test module includes a grid division unit and a modal calculation unit, wherein The grid division unit is configured to divide the finite element grid by using tetrahedral elements or hexahedral elements according to the three-dimensional geometric model of the to-be-detected case. The modal calculation unit is configured to perform modal analysis on the divided grid model, solve a structure dynamics equation, perform harmonic response analysis in a frequency range set by the vibration load condition based on a result of the modal analysis, and calculate simulation response data.

7. A computing device, comprising: A computer program product comprising a computer readable medium having stored thereon the computer program for use in the computer device of claim 7, which computer program is executable by the processor to cause the computer device to perform the steps of the method of any one of claims 1-4.

8. A storage medium, characterized by A computer program product comprising a computer readable medium having stored thereon the computer program for use in the computer device of claim 7, which computer program is executable by the processor to cause the computer device to perform the steps of the method of any one of claims 1-4.

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