CN113449452A - Simulation test method, device and equipment for instrument board assembly - Google Patents
Simulation test method, device and equipment for instrument board assembly Download PDFInfo
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Abstract
The application provides a simulation test method, a simulation test device and simulation test equipment for an instrument panel assembly, wherein the method comprises the following steps: establishing an FEM model according to the CAD data and the CAD data of the test bed assembly; carrying out finite element discretization meshing on the FEM model to obtain a meshed FEM model; determining a first structural simulation relation and a second structural simulation relation of an instrument panel assembly in the gridded FEM model according to the gridded FEM model; and testing the gridded FEM model according to a preset structural test condition, the first structural simulation relation and the second structural simulation relation to obtain an instrument panel assembly test result, wherein the instrument panel assembly test result is used for adjusting the CAD data of the instrument panel assembly. The whole process of vibration of the instrument panel assembly on the test vibration table is truly simulated, the structural design problem is judged, the abnormal sound problem is solved, and the added parts are needed, so that an effective improvement suggestion is provided for the structural design of the instrument panel assembly.
Description
Technical Field
The present disclosure relates to vehicle technologies, and in particular, to a method, an apparatus, and a device for testing an instrument panel assembly.
Background
In vehicles, it is common to provide an instrument panel assembly, and it is necessary to determine whether the instrument panel assembly is properly designed before manufacturing the instrument panel assembly, so that data of the instrument panel assembly needs to be verified and tested.
In the prior art, after Computer Aided Design (CAD) data of an instrument panel assembly is acquired, the CAD data of the instrument panel assembly is manually verified, and then a CAD data test of the instrument panel assembly is completed to determine whether the CAD data of the instrument panel assembly is reasonable.
However, in the prior art, when the CAD data of the instrument panel assembly is tested, the CAD data of the instrument panel assembly can only be verified in a manual verification manner, which easily causes a judgment error and a test error. Further, design errors of the instrument panel assembly are caused, and the development period of the instrument panel assembly and the vehicle is prolonged.
Disclosure of Invention
The application provides a simulation test method, a simulation test device and simulation test equipment for an instrument panel assembly, which are used for solving the problems of test errors, design errors of the instrument panel assembly and extension of the development cycle of the instrument panel assembly and a vehicle.
In a first aspect, the present application provides a method for simulation testing of an instrument panel assembly, the method comprising:
establishing a finite element method FEM model according to the CAD data of the instrument panel assembly and the CAD data of the test bed assembly;
carrying out finite element discretization meshing on the FEM model to obtain a meshed FEM model;
determining a first structural simulation relationship and a second structural simulation relationship of an instrument panel assembly in the gridded FEM model according to the gridded FEM model; wherein the first structural simulation relationship is used for representing the connection relationship among parts of the instrument panel assembly in the gridded FEM model, and the second structural simulation relationship is used for representing the structural relationship between the instrument panel assembly and the test bed assembly in the gridded FEM model;
and testing the gridded FEM model according to a preset structural test condition, the first structural simulation relation and the second structural simulation relation to obtain an instrument panel assembly test result, wherein the instrument panel assembly test result is used for adjusting CAD data of an instrument panel assembly.
In an optional embodiment, the finite element discretization meshing is performed on the FEM model to obtain a meshed FEM model, and the method includes:
and carrying out shell finite element meshing on an instrument panel assembly in the FEM model, and carrying out solid finite element meshing on a test bed assembly in the FEM model to obtain the meshed FEM model.
In an alternative embodiment, determining a first structural simulation relationship and a second structural simulation relationship of a dashboard assembly in the grid FEM model according to the grid FEM model includes:
according to the gridding FEM model, determining simulation software units corresponding to all structures of the instrument panel assembly in the gridding FEM model, and carrying out structural weight balancing treatment on the instrument panel assembly in the gridding FEM model to configure weight and mass center for partial structure in the instrument panel assembly in the gridding FEM model;
and determining the second structure simulation relation according to the connection relation between the instrument panel assembly and the test bed assembly in the gridded FEM model.
In an optional implementation manner, the testing the grid FEM model according to a preset structural test condition, the first structural simulation relationship, and the second structural simulation relationship to obtain a test result of the instrument panel assembly includes:
applying force information to a dashboard assembly of the meshed FEM model;
and testing the gridded FEM model according to the first structure simulation relation, the second structure simulation relation and the structure test condition according to the force information to obtain an instrument panel assembly test result.
In an optional embodiment, the method further comprises:
the instrument panel assembly test result comprises displacement root mean square value distribution information of each structure of the instrument panel assembly in the gridded FEM model in each excitation direction, wherein the displacement root mean square value distribution information in each excitation direction comprises displacement root mean square values of displacement values under different frequencies.
In an optional embodiment, the method further comprises:
for each structure of an instrument and dial plate assembly in the gridded FEM model, if the displacement root mean square value of the structure in each excitation direction is less than or equal to a preset threshold value, determining that the structure is a normal part;
and aiming at each structure of the instrument panel assembly in the gridded FEM model, if the displacement root mean square value of the structure in any excitation direction is larger than a preset threshold value, determining that the structure is an abnormal part, and adjusting the CAD data of the instrument panel assembly corresponding to the abnormal structure.
In a second aspect, the present application provides a simulated testing apparatus for an instrument panel assembly, the apparatus comprising:
the building unit is used for building a finite element method FEM model according to the CAD data of the instrument panel assembly and the CAD data of the test bed assembly;
the dividing unit is used for carrying out finite element discretization grid division on the FEM model to obtain a meshed FEM model;
a determining unit, configured to determine, according to the meshed FEM model, a first structural simulation relationship and a second structural simulation relationship of a dashboard assembly in the meshed FEM model; wherein the first structural simulation relationship is used for representing the connection relationship among parts of the instrument panel assembly in the gridded FEM model, and the second structural simulation relationship is used for representing the structural relationship between the instrument panel assembly and the test bed assembly in the gridded FEM model;
and the testing unit is used for testing the gridded FEM model according to a preset structural testing condition, the first structural simulation relation and the second structural simulation relation to obtain an instrument panel assembly testing result, wherein the instrument panel assembly testing result is used for adjusting the CAD data of the instrument panel assembly.
In an optional implementation manner, the dividing unit is specifically configured to:
and carrying out shell finite element meshing on an instrument panel assembly in the FEM model, and carrying out solid finite element meshing on a test bed assembly in the FEM model to obtain the meshed FEM model.
In an optional embodiment, the determining unit includes:
the first determination module is used for determining simulation software units corresponding to all structures of the instrument panel assembly in the gridded FEM model according to the gridded FEM model, and performing structural weight balancing processing on the instrument panel assembly in the gridded FEM model to configure weight and mass center for partial structure in the instrument panel assembly in the gridded FEM model;
and the second determining module is used for determining the second structural simulation relation according to the connection relation between the instrument panel assembly and the test bed assembly in the gridding FEM model.
In an alternative embodiment, the test unit includes:
an application module for applying force information to a dashboard assembly of the meshed FEM model;
and the testing module is used for testing the gridded FEM model according to the first structure simulation relation, the second structure simulation relation and the structure testing condition according to the force information to obtain a testing result of the instrument panel assembly.
In an alternative embodiment, the apparatus further comprises:
the instrument panel assembly test result comprises displacement root mean square value distribution information of each structure of the instrument panel assembly in the gridded FEM model in each excitation direction, wherein the displacement root mean square value distribution information in each excitation direction comprises displacement root mean square values of displacement values under different frequencies.
In an alternative embodiment, the apparatus further comprises:
the first analysis unit is used for determining that each structure of the instrument and dial plate assembly in the gridded FEM model is a normal part if the displacement root mean square value of the structure in each excitation direction is less than or equal to a preset threshold value;
and the second analysis unit is used for determining that the structure is an abnormal part and adjusting the CAD data of the instrument panel assembly corresponding to the abnormal structure if the displacement root mean square value of the structure in any excitation direction is larger than a preset threshold value for each structure of the instrument panel assembly in the gridded FEM model.
In a third aspect, the present application provides an electronic device, comprising: a memory and a processor;
a memory; a memory for storing the processor-executable instructions;
wherein the processor is configured to perform the method of the first aspect.
In a fourth aspect, the present application provides a computer-readable storage medium having stored thereon computer-executable instructions for implementing the method according to the first aspect when executed by a processor.
In a fifth aspect, the present application provides a computer program product which, when executed by a processor, implements the method of the first aspect.
The method, the device and the equipment for the simulation test of the instrument panel assembly firstly establish an FEM model according to CAD data of the instrument panel assembly and CAD data of a test bed assembly, carry out finite element discretization gridding division on the FEM model to obtain a gridded FEM model, simulate the connection among all parts of the instrument panel assembly in the gridded FEM model and the connection between the instrument panel assembly and the test bed assembly by adopting the existing simulation unit in simulation software, carry out simulation on the gridded FEM model according to preset structural test conditions, truly simulate the whole process of the instrument panel assembly vibrating on a test vibration bed, obtain a test result of the random vibration and abnormal sound of the instrument panel assembly through simulation, judge structural design problems and solve the parts needing to be added in the abnormal sound problem, and provide effective improvement suggestions for the structural design of the instrument panel assembly, the research and development resource waste caused by later-stage problem rectification is avoided.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
Fig. 1 is a schematic flowchart of a simulation testing method for an instrument panel assembly according to an embodiment of the present disclosure;
FIG. 2 is a schematic view of an instrument panel assembly and a test bed assembly according to an embodiment of the present disclosure;
FIG. 3 is a first diagram illustrating simulation test results provided by an embodiment of the present application;
fig. 4 is a schematic diagram illustrating a simulation test result provided in the embodiment of the present application;
FIG. 5 is a schematic view of another exemplary embodiment of a method for testing a dashboard assembly;
fig. 6 is a schematic structural diagram of a simulation testing apparatus of an instrument panel assembly according to an embodiment of the present disclosure;
FIG. 7 is a schematic structural diagram of a simulation test device of another instrument panel assembly according to an embodiment of the present disclosure;
fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
With the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. These drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
The instrument panel assembly is an important component of the vehicle, and comprises various indicating instruments and ignition switches installed in a cab and a part of a vehicle body, and the instrument panel assembly is also a main source of the abnormal sound problem of the vehicle, so that the problem of the abnormal sound of the instrument panel assembly is timely discovered and solved, which is very important in the research and development process of the vehicle, and further, the data of the instrument panel assembly needs to be verified and tested at the initial design stage.
In the prior art, after the CAD data of the instrument panel assembly is acquired, manual data Analysis is performed by manually checking the CAD data and applying methods such as Design Failure Mode and Effects Analysis (DFMEA for short) problem database data retrieval problem, and the like, the position of the instrument panel assembly which may cause the abnormal sound problem is determined by experience, and the Design of the instrument panel assembly is improved by adding parts and the like.
In the prior art, when the CAD data of the instrument panel assembly is tested, the CAD data of the instrument panel assembly is verified in a mode of manual checking and data retrieval of a DFMEA problem database, so that unnecessary design is easily increased, parts are increased, and cost is increased. Furthermore, a large number of problems can not be found in an early data stage through manual checking and DFMEA problem database data retrieval, and then the problems can be found only in test verification, the instrument panel assembly CAD data and the die are frozen at the moment, and a large number of setting changes can be generated by modifying the design CAD data, so that the die is modified or scrapped, further, the whole vehicle research and development cost is increased, the whole vehicle development period is prolonged, and the research and development resource waste is caused.
The application provides a simulation test method, a simulation test device and simulation test equipment for an instrument panel assembly, and aims to solve the technical problems in the prior art.
The following describes the technical solutions of the present application and how to solve the above technical problems with specific embodiments. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present application will be described below with reference to the accompanying drawings.
Fig. 1 is a simulation test method of an instrument panel assembly according to an embodiment of the present application, and as shown in fig. 1, the method includes:
101. and establishing a Finite Element Method (FEM) model according to the CAD data of the instrument panel assembly and the CAD data of the test bed assembly.
Exemplarily, fig. 2 is a schematic view illustrating a connection between an instrument panel assembly and a test bed assembly according to an embodiment of the present application. The instrument board assembly comprises various indicating instruments and ignition switches installed in a cab of the vehicle and a part of a vehicle body, and the test bed assembly comprises a test bed and a tool for connecting the test bed and the instrument board assembly.
Illustratively, the simulation of the random vibration abnormal sound of the instrument panel assembly needs to be carried out in simulation software, and then the CAD data of the instrument panel assembly and the CAD data of the test bed assembly need to be assembled and combined together, and the assembled CAD data model is converted into a three-dimensional model which can be calculated and identified by the simulation software, namely, an FEM model.
102. And carrying out finite element discretization meshing on the FEM model to obtain a meshed FEM model.
Illustratively, finite element discretization meshing is carried out on an instrument panel assembly and a test bed assembly in the FEM model by using a preprocessing modeling tool in simulation software, and different meshing methods are adopted for the instrument panel assembly and the test bed assembly due to different material properties of the instrument panel assembly and the test bed assembly. For example, shell finite element meshing is performed on the instrument panel assembly; and carrying out entity finite element meshing on the test bed assembly.
In one example, the instrument panel assembly of the FEM model includes a plurality of parts, such as an upper instrument panel body assembly, an instrument panel tubular beam assembly, a glove box assembly, a lower instrument panel body assembly, a left lower guard plate assembly and a decoration strip assembly; determining the middle surface of each part in an instrument board assembly of the FEM model, and setting the thickness of the middle surface of each part; and carrying out shell finite element meshing on each part according to the thickness of the middle surface of each part. The test bed assembly comprises a test bed and a tool; and carrying out entity finite element gridding on the test bed assembly.
103. Determining a first structural simulation relation and a second structural simulation relation of an instrument panel assembly in the gridded FEM model according to the gridded FEM model; the first structural simulation relation is used for representing the connection relation among all parts of the instrument panel assembly in the gridding FEM model, and the second structural simulation relation is used for representing the structural relation between the instrument panel assembly and the test bed assembly in the gridding FEM model.
Illustratively, a preprocessing modeling work in simulation software is used for establishing a connection relation for each part in an instrument panel assembly in a gridding FEM model, and then a first structure simulation relation of the instrument panel assembly is obtained.
In one example, if the parts in the instrument panel assembly are connected by electric welding, the REB3-HEXA-REB3 unit or the BEAM unit in the simulation software can be used for simulating the connection of the electric welding. If the components in the instrument panel assembly are connected using HINGE rotation axes, the HINGE rotation axes can be simulated using the HINGE unit in the simulation software. If the parts in the instrument panel assembly are connected by BOLTs, a BOLT unit in simulation software can be used for simulating the connection mode of the BOLTs. If the parts in the instrument panel assembly are connected in a two-guarantee welding mode, an RBE2 unit or an MPC unit in simulation software can be used for simulating the two-guarantee welding connection mode. And gaps among all parts in the instrument board assembly are simulated by using a CBUSH unit in simulation software.
And (3) performing model assembly connection on the connection between the instrument panel assembly and the test bed assembly (wherein the test bed assembly comprises a test bed and a tool) in the gridded FEM model by using the pre-processing modeling work in the simulation software, and further obtaining a second structure simulation relation.
In one example, the connection between the instrument board assembly and the tool is simulated by using an RBE2 unit in simulation software; when the pipe beam is connected with a tool mounting point, 6 degrees of freedom are constrained by using an RBE2 unit in simulation software; when the front part of the air duct or the instrument board is connected with the tool, the RBE2 unit in the simulation software is used for restraining the translation in the Z direction.
104. And testing the gridded FEM model according to a preset structural test condition, a first structural simulation relation and a second structural simulation relation to obtain an instrument panel assembly test result, wherein the instrument panel assembly test result is used for adjusting the CAD data of the instrument panel assembly.
In one example, the predetermined structural test conditions include one or more of the following: the method comprises the following steps of a boundary constraint set, a boundary constraint condition, a unit acceleration excitation load, a unit acceleration load along frequency list, a unit acceleration load along frequency, a frequency output response list, a modal frequency range, a modal frequency response analysis step and an acceleration power spectrum density along frequency list. And before the simulation calculation is started, the preset structure test conditions are established through an operation interface in simulation software.
Illustratively, a structural test condition is established in advance, and the gridded FEM model can be tested according to the structural test condition; in the testing process, the gridded FEM model is tested based on the first structure simulation relation and the second structure simulation relation. And further generating a test result of the instrument panel assembly.
The instrument board assembly test result represents whether each part of the instrument board assembly is an abnormal part or not. And further, the CAD data of each part of the instrument board assembly can be adjusted according to the test result of the instrument board assembly.
The above structural test conditions include one or more of the following.
The structure test conditions are boundary constraint set and boundary constraint conditions. A boundary constraint set and boundary constraint conditions need to be established. An operation panel for establishing a boundary constraint set and boundary constraint conditions is provided on an operation interface in simulation software, and the following operations are carried out on the operation panel: constraining six degrees of freedom (SPC) of an RBE2 main node connected with two excitation points at the lower part of a test bed (for example, the test bed is a vibration test bed), and applying Y-direction vibration excitation; the Y-direction vibration excitation refers to six degrees of freedom (SPC) for restraining RBE2 main nodes connected with excitation points on the left side and the right side of the vibration test bed. Wherein, the application force in X direction, Y direction and Z direction can be applied to the test bed; the X, Y and Z directions refer to the three directions of the three-dimensional space of the simulation software.
The structural test condition is a unit acceleration excitation load. An operation panel for establishing the unit acceleration exciting load is provided on an operation interface in the simulation software, and the following operations are carried out on the operation panel: clicking a Load Collectors option of an operation panel, entering a Load collector panel, selecting a no card image in a loadcol name option of the operation panel acc, clicking a create/edge option of the operation panel, and completing the unit acceleration Load collector. The tool command constraints from the operation panel enters a unit acceleration excitation input interface, the load type option is set to be SPCD, the acceleration excitation direction is X direction, dof1 is selected to be 1, the acceleration excitation direction is Y direction, dof2 is selected to be 1, the acceleration excitation direction is Z direction, and dof3 is selected to be 1. The unit acceleration excitation load is created here to define the direction and characteristics of the unit acceleration excitation load.
The structural test conditions are tabulated of unit acceleration load versus frequency. An operation panel for establishing a unit acceleration load along with frequency list is provided on an operation interface in simulation software, and the following operations are carried out on the operation panel: clicking a Load Collectors option of an operation panel by a mouse to enter a Load collector panel, inputting a linked 1 in a loadcol name option, selecting a TABLED1 by a card image, clicking a create/edge option to enter a setting interface, inputting a frequency value in an x (1) option, wherein the frequency value corresponds to a direction power spectral density frequency to be loaded, a power spectral density list is a set value of a test standard, inputting a unit acceleration 1 in a y (1) option, and selecting an input list number in a TABLED1_ NUM. The unit acceleration load versus frequency list is created here to relate acceleration to frequency one-to-one according to the set values of the test criteria.
Illustratively, the unit acceleration versus frequency load is established:
the structural test condition is the unit acceleration load with frequency. An operation panel for establishing the load of unit acceleration along with frequency is provided on an operation interface in simulation software, and the following operations are carried out on the operation panel: clicking a Load Collectors option by a mouse to enter a Load collector panel, inputting RLOAD2 in a loadcol name option, selecting RLOAD2 in a card image option, clicking a create/edge option to enter a setting interface, selecting an established unit acceleration excitation Load acc in an EXCITEID option, selecting an established unit acceleration Load along with frequency list tabled1 in a TB option, and selecting ACCE in a TYPE option. The unit acceleration along with the frequency load relates the acceleration excitation load with the frequency, and the acceleration and the frequency in the acceleration load along with the frequency list are referred to.
The structural test condition is a frequency output response list. An operation panel for establishing a frequency output response list is provided on an operation interface in simulation software, and the following operations are carried out on the operation panel: clicking a Load Collectors option by a mouse to enter a Load collector panel, inputting FRQE2 in a loadcol name option, selecting FREQ in a card image option, clicking a create/edge option to enter a setting interface, selecting FREQ2 in a User Comments option, and generating a FREQ2 input item, wherein an initial frequency value is input by F1, a termination frequency value is input by F2, and the frequency output number from F1 to F2 is input on an NF option. The frequency output response is the transient response frequency of the instrument panel assembly under random vibration.
The structural test condition is a modal extraction collector, and an extraction modal frequency range can be set based on the modal extraction collector. An operation panel for setting the modal extraction aggregator is provided on an operation interface in the simulation software, and the following operations are carried out on the operation panel: clicking a Load Collectors option with a mouse to enter a Load collector panel, inputting a mode in a loadcol name option, selecting an EIGRL in a card image option, clicking a create/edge option to enter a setting interface, and extracting the frequency to 200 Hz. The mode refers to the inherent property of the instrument panel assembly, and is related to the material and the structure.
The structural test condition is a modal frequency response analysis step. An operation panel for setting the modal frequency response analysis step is provided on an operation interface in the simulation software, and the following operations are carried out on the operation panel: and clicking a loadsteps command under an Analysis option by a mouse, and entering an Analysis step setting interface. Freq _ resp is entered in the name option, and freq. Selecting the established degrees of freedom, selecting the established mode on a method (STRUCT) option, selecting the established RLOAD2 on a DLOAD option, selecting the established FRQE2 on a FREQ option, and creating a frequency response analysis step based on a create option.
The structural test conditions are a list of acceleration power spectral densities with frequency. An operation panel for setting an acceleration power spectrum density along with frequency list is provided on an operation interface in simulation software, and the following operations are carried out on the operation panel: clicking a Load Collectors option by a mouse to enter a Load aggregator panel, inputting TABRND1 in a loadcol name option, selecting TABRND1 in a card image option, clicking a create/edge option to enter a setting interface, selecting LOG in both an XAXIS option and a YAXIS option, setting a TABRND1_ NUM option as the number of power spectral densities, filling frequency in an f (1) option, and filling power spectral densities in a g (1) option.
In one example, acceleration excitation load is applied to an excitation point of the test bed assembly, simulation calculation is performed on the meshed FEM model, random response analysis results of different parts of the instrument panel assembly are obtained, further, an instrument panel assembly abnormal sound problem test result is obtained, and the instrument panel assembly abnormal sound problem test result is used for adjusting CAD data of the instrument panel assembly.
For example, the instrument panel assembly abnormal sound problem test result may be a displacement Root Mean Square (RMS) value distribution diagram of displacement values of different parts at different frequencies, and fig. 3 is a schematic diagram first of a simulation test result provided in the embodiment of the present application, as shown in fig. 3, where an abscissa is time and a unit is second(s); the ordinate is the distance increment in millimeters (mm) and fig. 3 shows the RMS values of displacement values of various parts at different frequencies over time. Fig. 4 is a schematic diagram of a simulation test result provided in the embodiment of the present application, as shown in fig. 4, an abscissa is time, and a unit is second(s); the ordinate is the distance increment in millimeters (mm) and fig. 4 shows the RMS values of displacement values for the next part at different frequencies over time.
Wherein the random response analysis result is related to the excitation direction: if the excitation direction is the X direction, the position with the displacement root mean square value larger than 0.5mm is an abnormal sound risk area; when the excitation direction is Y direction, the position with the displacement root mean square value larger than 0.5mm is an abnormal sound risk area; when the excitation direction is the Z direction, the displacement root mean square value is larger than 0.5mm, and the displacement root mean square value is an abnormal sound risk area. And when the abnormal sound risk area is found, modifying the design structure of the instrument panel according to the position of the corresponding instrument panel assembly.
In the embodiment, firstly, the FEM model is established according to the CAD data of the instrument board assembly and the CAD data of the test bed assembly, carrying out finite element discretization gridding on the FEM model to obtain a gridded FEM model, simulating the connection among all parts of an instrument panel assembly in the gridded FEM model and the connection between the instrument panel assembly and a test bed assembly by adopting an existing simulation unit in simulation software, carrying out simulation on the gridded FEM model on the basis of a preset structural test condition to truly simulate the whole process of the vibration of the instrument panel assembly on a test vibration table, the instrument panel assembly random vibration abnormal sound test result is obtained through simulation, the structural design problem is judged, the abnormal sound problem is solved, parts needing to be added are judged, effective improvement suggestions are provided for the structural design of the instrument panel assembly, and research and development resource waste caused by later-stage problem rectification is avoided.
Fig. 5 is a simulation test method of another instrument panel assembly provided in an embodiment of the present application, and as shown in fig. 5, the method includes:
201. and establishing an FEM model according to the CAD data of the instrument board assembly and the CAD data of the test bed assembly.
For example, this step may refer to step 101 in fig. 1, and is not described again.
202. And carrying out shell finite element meshing on an instrument panel assembly in the FEM model, and carrying out entity finite element meshing on a test bed assembly in the FEM model to obtain a meshed FEM model.
For example, this step may refer to step 102 in fig. 1, and is not described again.
203. According to the gridding FEM model, determining simulation software units corresponding to all structures of the instrument panel assembly in the gridding FEM model, and performing structural weight balancing processing on the instrument panel assembly in the gridding FEM model to configure weight and mass center for partial structure in the instrument panel assembly in the gridding FEM model; wherein the first structural simulation relationship is used for representing the connection relationship among parts of the instrument panel assembly in the gridded FEM model.
Illustratively, the connection of each part in the instrument panel assembly in the gridded FEM model is subjected to model assembly connection by adopting the existing units in the simulation software by using preprocessing modeling work in the simulation software
In addition, in the process of performing simulation analysis on the instrument panel assembly, some parts in the instrument panel assembly need not to be considered, such as stress and deformation, but the existence of the parts affects the analysis precision and accuracy of the whole model, and the parts need to be simulated by using the outer contour grid model and the mass balancing weight.
The instrument panel modal analysis mainly comprises the following components which need to be weighted: the System comprises an air conditioner, a Public Address System (PAB), a sound, a Digital Versatile Disc (DVD), a fuse box, a keyless Entry and Start (PEPS) System, a combination instrument, a steering column and all electric devices arranged on an instrument panel assembly or a tube beam assembly. The combination instrument, the DVD screen, the host, the PAB, the fuse box and the instrument panel assembly are in direct or indirect matching relation, so that an outer contour grid model and a mass balancing weight need to be used for balancing weight, other electric devices can directly balance weight at a mass center, and the mass center units of the electric devices are connected with a mounting point through an RBE3 unit.
204. Determining a second structural simulation relation according to the connection relation between the instrument panel assembly and the test bed assembly in the gridded FEM model; the second structural simulation relationship is used for representing the structural relationship between the instrument panel assembly and the test bed assembly in the gridded FEM model.
Illustratively, the connection between an instrument panel assembly in a gridded FEM model and a test bed and a tool is carried out by model assembly connection by adopting existing units in simulation software by using pretreatment modeling work in the simulation software: the instrument panel assembly is connected with the tool by adopting RBE2 unit simulation, when the pipe beam is connected with the mounting point of the tool, 6 degrees of freedom are restrained by using an RBE2 unit, and when the air duct or the front part of the instrument panel is connected with the tool, the Z-direction translation is restrained by using an RBE2 unit.
205. Force information is applied to a dashboard assembly of the gridded FEM model.
In one example, force information is applied to an excitation point of a test bed based on preset structural test conditions, a grid FEM model is subjected to simulation calculation, and the whole process of vibration of the instrument panel assembly on a test vibration bed is simulated.
206. And testing the gridded FEM model according to the force information and the first structure simulation relation, the second structure simulation relation and the structure test condition to obtain an instrument panel assembly test result, wherein the instrument panel assembly test result is used for adjusting the CAD data of the instrument panel assembly.
In one example, the instrument panel assembly test result includes displacement root mean square value distribution information of each structure of the instrument panel assembly in the gridded FEM model in each excitation direction, where the displacement root mean square value distribution information in each excitation direction includes displacement root mean square values of displacement values at different frequencies.
For example, since the force information is applied to the instrument panel assembly, when the gridded FEM model is tested, the gridded FEM model can be tested based on the force information, and the test process of the medicine is completed according to the first structure simulation relationship, the second structure simulation relationship and the structure test condition in the test process. The structural test conditions refer to the description of the above embodiments, and are not described again.
After the test, an instrument panel assembly test result can be obtained, and the instrument panel assembly test result includes displacement root mean square value distribution information of each structure (i.e., each part) of the instrument panel assembly in the gridded FEM model in each excitation direction. Wherein, the excitation direction includes the X direction, the Y direction and the Z direction. And for each excitation direction, the displacement root mean square value distribution information in the excitation direction includes displacement root mean square values of displacement values at different frequencies.
The obtained instrument board assembly test result can be formed into a file in an H3D format; importing the file in the H3D format into the hyperview of the simulation software; the simulation software provides a viewing function, so that RMSover frequencies under the random response analysis working condition can be selected from the simulation software to view a distribution diagram of RMS values of displacement values under different frequencies.
207. And aiming at each structure of the instrument and dial plate assembly in the gridded FEM model, if the displacement root mean square value of the structure in each excitation direction is less than or equal to a preset threshold value, determining that the structure is a normal part.
Illustratively, after step 206, the RMS values of displacement values for each structure (i.e., each part of the dashboard assembly) in the respective actuation directions are viewed in a hyperview.
For each structure of the instrument panel assembly (i.e., each part of the instrument panel assembly), if the rms value of the displacement of the structure in each excitation direction is less than or equal to a preset threshold, the structure is determined to be a normal part. For example, for a structure of the instrument panel assembly, the displacement root mean square value of the structure in the excitation direction of the X direction is less than 0.5 mm; in the excitation direction of the Y direction, the displacement root mean square value of the structure is less than 0.5 mm; and in the excitation direction of the Z direction, if the displacement root mean square value of the structure is less than 0.5mm, determining that the structure has no abnormal sound problem under random vibration, and the structure is a normal part.
208. And aiming at each structure of the instrument panel assembly in the gridded FEM model, if the displacement root mean square value of the structure in any excitation direction is larger than a preset threshold value, determining that the structure is an abnormal part, and adjusting the CAD data of the instrument panel assembly corresponding to the abnormal structure.
Illustratively, after step 206, the RMS values of displacement values for each structure in the various excitation directions are reviewed in hyperview. For each structure of the instrument panel assembly (i.e., each part of the instrument panel assembly), the structure is determined to be an abnormal part as long as the root mean square value of the displacement of the structure in each excitation direction is less than or equal to a preset threshold value.
For example, for a structure of the instrument panel assembly, if the displacement root mean square value of the structure in the X-direction excitation direction is greater than 0.5mm, the structure is an abnormal sound risk area, that is, the structure is an abnormal part. For a structure of the instrument panel assembly, if the root mean square value of displacement of the structure in the excitation direction of the Y direction is greater than 0.5mm, the structure is an abnormal sound risk area, that is, the structure is an abnormal part. For a structure of the instrument panel assembly, if the displacement root mean square value of the structure in the Z-direction excitation direction is greater than 0.5mm, the structure is an abnormal sound risk area, that is, the structure is an abnormal part.
When the structure summarized by the instrument panel is determined to be an abnormal part, the CAD data of the instrument panel assembly corresponding to the structure needs to be adjusted, and then the design structure of the instrument panel assembly is modified.
In this embodiment, first, a FEM model is built according to the CAD data of the instrument panel assembly and the CAD data of the test bed assembly, carrying out finite element discretization gridding on the FEM model to obtain a gridded FEM model, simulating the connection among all parts of an instrument panel assembly in the gridded FEM model and the connection between the instrument panel assembly and a test bed assembly by adopting the existing simulation unit in simulation software, carrying out simulation on the gridded FEM model according to preset structural test conditions, truly simulating the whole process of the instrument panel assembly vibrating on a test vibration table, aiming at each structure of the instrument panel assembly in the gridded FEM model, obtaining a test result of the random vibration abnormal sound of the instrument panel assembly through analog simulation, and determining that the structure is a normal part if the root mean square value of the displacement of the structure in each excitation direction is less than or equal to a preset threshold value; if the displacement root mean square value of the structure in any excitation direction is larger than a preset threshold value, the structure is determined to be an abnormal part, the structural design problem is judged, the abnormal sound problem is solved, parts needing to be added are determined, effective improvement suggestions are provided for the structural design of the instrument panel assembly, and research and development resource waste caused by later-stage problem rectification is avoided.
Fig. 6 is a schematic structural diagram of a simulation testing apparatus for an instrument panel assembly according to an embodiment of the present application, and as shown in fig. 6, the apparatus includes:
and the establishing unit 31 is used for establishing the FEM model according to the CAD data of the instrument panel assembly and the CAD data of the test bed assembly.
The dividing unit 32 is configured to perform finite element discretization meshing on the FEM model to obtain a meshed FEM model.
A determining unit 33, configured to determine, according to the gridded FEM model, a first structural simulation relationship and a second structural simulation relationship of the instrument panel assembly in the gridded FEM model; the first structural simulation relation is used for representing the connection relation among all parts of the instrument panel assembly in the gridding FEM model, and the second structural simulation relation is used for representing the structural relation between the instrument panel assembly and the test bed assembly in the gridding FEM model.
The testing unit 34 is configured to test the meshed FEM model according to a preset structural testing condition, a first structural simulation relationship, and a second structural simulation relationship, to obtain an instrument panel assembly testing result, where the instrument panel assembly testing result is used to adjust CAD data of the instrument panel assembly.
For example, the present embodiment may refer to the above method embodiments, and the principle and the technical effect are similar and will not be described again.
Fig. 7 is a schematic structural diagram of another simulation testing apparatus for an instrument panel assembly according to an embodiment of the present application, and based on the embodiment shown in fig. 6, as shown in fig. 7, a dividing unit 32 is specifically configured to: and carrying out shell finite element meshing on an instrument panel assembly in the FEM model, and carrying out entity finite element meshing on a test bed assembly in the FEM model to obtain a meshed FEM model.
In one example, the determining unit 33 includes:
the first determining module 331 is configured to determine, according to the meshed FEM model, simulation software units corresponding to each structure of the instrument panel assembly in the meshed FEM model, and perform structural weight balancing processing on the instrument panel assembly in the meshed FEM model to configure a weight and a centroid for a part of the structure in the instrument panel assembly in the meshed FEM model.
The second determining module 332 is configured to determine a second structural simulation relationship according to a connection relationship between the instrument panel assembly and the test bed assembly in the meshed FEM model.
In one example, test unit 34 includes:
an apply module 341 to apply force information to a dashboard assembly of the gridded FEM model.
The testing module 342 is configured to test the meshed FEM model according to the force information and according to the first structural simulation relationship, the second structural simulation relationship and the structural testing condition, so as to obtain a testing result of the instrument panel assembly.
In one example, the instrument panel assembly test result includes displacement root mean square value distribution information of each structure of the instrument panel assembly in the gridded FEM model in each excitation direction, where the displacement root mean square value distribution information in each excitation direction includes displacement root mean square values of displacement values at different frequencies.
In an example, the apparatus provided in this embodiment further includes:
the first determining unit 41 is configured to, for each structure of the instrument and dial assembly in the meshed FEM model, determine that the structure is a normal part if the root mean square value of displacement of the structure in each excitation direction is less than or equal to a preset threshold.
And a second determining unit 42, configured to determine, for each structure of the instrument panel assembly in the meshed FEM model, that the structure is an abnormal portion if a root mean square value of displacement of the structure in any excitation direction is greater than a preset threshold, and adjust CAD data of the instrument panel assembly corresponding to the abnormal structure.
For example, the present embodiment may refer to the above method embodiments, and the principle and the technical effect are similar and will not be described again.
Fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present application, and as shown in fig. 8, the electronic device includes: memory 51, processor 52.
A memory 51; a memory for storing instructions executable by processor 52.
Wherein the processor 52 is configured to perform the method as provided in the above embodiments.
Embodiments of the present application also provide a non-transitory computer-readable storage medium, where instructions in the storage medium, when executed by a processor of an electronic device, enable the electronic device to perform the method provided by the above embodiments.
An embodiment of the present application further provides a computer program product, where the computer program product includes: a computer program, stored in a readable storage medium, from which at least one processor of the electronic device can read the computer program, the at least one processor executing the computer program causing the electronic device to perform the solution provided by any of the embodiments described above.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (10)
1. A method of simulation testing of an instrument panel assembly, the method comprising:
establishing a finite element method FEM model according to the CAD data of the instrument panel assembly and the CAD data of the test bed assembly;
carrying out finite element discretization meshing on the FEM model to obtain a meshed FEM model;
determining a first structural simulation relationship and a second structural simulation relationship of an instrument panel assembly in the gridded FEM model according to the gridded FEM model; wherein the first structural simulation relationship is used for representing the connection relationship among parts of the instrument panel assembly in the gridded FEM model, and the second structural simulation relationship is used for representing the structural relationship between the instrument panel assembly and the test bed assembly in the gridded FEM model;
and testing the gridded FEM model according to a preset structural test condition, the first structural simulation relation and the second structural simulation relation to obtain an instrument panel assembly test result, wherein the instrument panel assembly test result is used for adjusting CAD data of an instrument panel assembly.
2. The method of claim 1, wherein the finite element discretization meshing of the FEM model to obtain a meshed FEM model comprises:
and carrying out shell finite element meshing on an instrument panel assembly in the FEM model, and carrying out solid finite element meshing on a test bed assembly in the FEM model to obtain the meshed FEM model.
3. The method of claim 1, wherein determining a first structural simulation relationship and a second structural simulation relationship for a dashboard assembly in the gridded FEM model from the gridded FEM model comprises:
according to the gridding FEM model, determining simulation software units corresponding to all structures of the instrument panel assembly in the gridding FEM model, and carrying out structural weight balancing treatment on the instrument panel assembly in the gridding FEM model to configure weight and mass center for partial structure in the instrument panel assembly in the gridding FEM model;
and determining the second structure simulation relation according to the connection relation between the instrument panel assembly and the test bed assembly in the gridded FEM model.
4. The method of claim 1, wherein testing the gridded FEM model according to a preset structural test condition, the first structural simulation relationship, and the second structural simulation relationship to obtain a dashboard assembly test result comprises:
applying force information to a dashboard assembly of the meshed FEM model;
and testing the gridded FEM model according to the first structure simulation relation, the second structure simulation relation and the structure test condition according to the force information to obtain an instrument panel assembly test result.
5. The method according to any one of claims 1 to 4, wherein the dashboard assembly test result includes information of displacement root mean square value distribution of structures of the dashboard assembly in each excitation direction in the gridded FEM model, and wherein the information of displacement root mean square value distribution in each excitation direction includes displacement root mean square values of displacement values at different frequencies.
6. The method of claim 5, further comprising:
for each structure of an instrument and dial plate assembly in the gridded FEM model, if the displacement root mean square value of the structure in each excitation direction is less than or equal to a preset threshold value, determining that the structure is a normal part;
and aiming at each structure of the instrument panel assembly in the gridded FEM model, if the displacement root mean square value of the structure in any excitation direction is larger than a preset threshold value, determining that the structure is an abnormal part, and adjusting the CAD data of the instrument panel assembly corresponding to the abnormal structure.
7. A simulation test apparatus for an instrument panel assembly, the apparatus comprising:
the building unit is used for building a finite element method FEM model according to the CAD data of the instrument panel assembly and the CAD data of the test bed assembly;
the dividing unit is used for carrying out finite element discretization grid division on the FEM model to obtain a meshed FEM model;
a determining unit, configured to determine, according to the meshed FEM model, a first structural simulation relationship and a second structural simulation relationship of a dashboard assembly in the meshed FEM model; wherein the first structural simulation relationship is used for representing the connection relationship among parts of the instrument panel assembly in the gridded FEM model, and the second structural simulation relationship is used for representing the structural relationship between the instrument panel assembly and the test bed assembly in the gridded FEM model;
the testing unit is used for testing the gridded FEM model according to a preset structural testing condition, the first structural simulation relation and the second structural simulation relation to obtain an instrument panel assembly testing result, wherein the instrument panel assembly testing result is used for adjusting CAD data of an instrument panel assembly;
wherein, the dividing unit is specifically configured to:
and carrying out shell finite element meshing on an instrument panel assembly in the FEM model, and carrying out solid finite element meshing on a test bed assembly in the FEM model to obtain the meshed FEM model.
8. The apparatus of claim 7, wherein the determining unit comprises:
the first determination module is used for determining simulation software units corresponding to all structures of the instrument panel assembly in the gridded FEM model according to the gridded FEM model, and performing structural weight balancing processing on the instrument panel assembly in the gridded FEM model to configure weight and mass center for partial structure in the instrument panel assembly in the gridded FEM model;
and the second determining module is used for determining the second structural simulation relation according to the connection relation between the instrument panel assembly and the test bed assembly in the gridding FEM model.
9. The apparatus of claim 7, wherein the test unit comprises:
an application module for applying force information to a dashboard assembly of the meshed FEM model;
and the testing module is used for testing the gridded FEM model according to the first structure simulation relation, the second structure simulation relation and the structure testing condition according to the force information to obtain a testing result of the instrument panel assembly.
10. The apparatus according to any one of claims 7-9, wherein the dashboard assembly test result includes information of a distribution of rms displacement values of the structures of the dashboard assembly in each excitation direction in the meshed FEM model, wherein the information of rms displacement value distribution in each excitation direction includes rms displacement values of displacement values at different frequencies;
the device further comprises:
the first analysis unit is used for determining that each structure of the instrument and dial plate assembly in the gridded FEM model is a normal part if the displacement root mean square value of the structure in each excitation direction is less than or equal to a preset threshold value;
and the second analysis unit is used for determining that the structure is an abnormal part and adjusting the CAD data of the instrument panel assembly corresponding to the abnormal structure if the displacement root mean square value of the structure in any excitation direction is larger than a preset threshold value for each structure of the instrument panel assembly in the gridded FEM model.
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