Acoustic package configuration method, computer equipment and storage medium

Abstract

The present invention relates to the field of automobile control technology, and the present invention discloses an acoustic package configuration method, a computer device, and a storage medium, the method comprising: establishing a SEA reference model of a reference object based on VAONE; loading the external acoustic load of the reference object into the SEA reference model; correcting the SEA reference model loaded with the external acoustic load according to the leakage test parameters and the overall noise test parameters of the reference object; replacing the initial material parameters in the SEA reference model with the development material parameters of the object to be developed, and recording the SEA reference model containing the development material parameters as a SEA transplant model; performing an overall noise level test on the SEA transplant model and obtaining the test results, and configuring an acoustic package for the object to be developed according to the test results. The present invention reasonably configures the spatial range for installing the acoustic package, and while ensuring the maximization of the noise reduction effect, ensures the structural safety and reliability of the object to be developed, and reduces the overall development cost of the object to be developed.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile development, and in particular to an acoustic package configuration method, a computer device and a storage medium. Background Art

[0002] At present, after the vehicle design is completed, acoustic package products are generally added between the vehicle interior and sheet metal to deal with noise in order to improve the acoustic quality in the vehicle. The shortcomings of this solution are: first, after the vehicle design is completed, it is passively treated with an acoustic package. At this time, since the space range for installing the acoustic package has been limited, the noise reduction effect cannot be guaranteed to be maximized, or even normalized, which will lead to uncertainty in the noise reduction effect of the acoustic package; second, since the installation space of the acoustic package is not reserved during the vehicle design process, there will be safety hazards if the acoustic package is deliberately installed to increase the noise reduction effect; third, in order to add and match the acoustic package, necessary changes need to be made to the vehicle, which will increase the cost of modification, so the overall cost of vehicle development will increase accordingly; and after the acoustic package is added after the vehicle development, if it needs to be verified from the perspective of actual engineering application, the time period will be quite long, and the verification cost will also increase accordingly. Summary of the invention

[0003] The embodiments of the present invention provide an acoustic package configuration method, a computer device, and a storage medium, which solve the problems of uncertain noise reduction effect, potential safety hazards, and high cost in the acoustic package design in the prior art.

[0004] A method for configuring an acoustic package, comprising:

[0005] Establishing a SEA reference model of a reference object based on VAONE; the SEA reference model includes initial material parameters of the reference object;

[0006] Acquiring an external acoustic load of the reference object, and loading the external acoustic load into the SEA reference model;

[0007] Acquiring leakage test parameters and overall noise test parameters of the reference object, and modifying the SEA reference model loaded with the external acoustic load according to the leakage test parameters and the overall noise test parameters;

[0008] Acquire development material parameters of the object to be developed, replace the initial material parameters in the SEA reference model with the development material parameters, and record the SEA reference model including the development material parameters as a SEA transplant model;

[0009] An overall noise level test is performed on the SEA transplant model and a test result is obtained, and an acoustic package is configured for the object to be developed according to the test result.

[0010] A computer device comprises a memory, a processor and computer-readable instructions stored in the memory and executable on the processor. When the processor executes the computer-readable instructions, the acoustic package configuration method is implemented.

[0011] A computer-readable storage medium stores computer-readable instructions, and when the computer-readable instructions are executed by a processor, the acoustic package configuration method is implemented.

[0012] The acoustic package configuration method, computer device and storage medium provided by the present invention establish a SEA reference model of a reference object based on VAONE; obtain the external acoustic load of the reference object, and load the external acoustic load into the SEA reference model; obtain the leakage test parameters and the overall noise test parameters of the reference object, and modify the SEA reference model loaded with the external acoustic load according to the leakage test parameters and the overall noise test parameters; obtain the development material parameters of the object to be developed, replace the initial material parameters in the SEA reference model with the development material parameters, and record the SEA reference model containing the development material parameters as a SEA transplantation model; perform an overall noise level test on the SEA transplantation model and obtain the test results, and configure an acoustic package for the object to be developed according to the test results. The present invention equips the object to be developed (for example, the vehicle to be developed) with an acoustic package at the vehicle development stage, i.e., according to the test results of the overall noise level test of the SEA transplant model, and can reasonably configure the spatial range for installing the acoustic package. While ensuring the maximization of the noise reduction effect, it also avoids the modification of the structure of the object to be developed due to the installation of the acoustic package after the development is completed, thereby ensuring the safety and reliability of the structure of the object to be developed. At the same time, there is no need to incur modification costs, thereby reducing the overall development cost of the object to be developed. Moreover, the present invention has already performed an overall noise level test on the object to be developed after the acoustic package is configured during the development process, thereby shortening the verification period and reducing the verification cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0014] Figure 1 is a flow chart of an acoustic package configuration method in one embodiment of the present invention;

[0015] Figure 2is a flow chart of step S30 of the acoustic package configuration method in one embodiment of the present invention;

[0016] Figure 3 is a flow chart of step S30 of the acoustic package configuration method in another embodiment of the present invention;

[0017] Figure 4 is a flow chart of step S50 of the acoustic package configuration method in one embodiment of the present invention;

[0018] Figure 5 is a flow chart of step S10 of the acoustic package configuration method in one embodiment of the present invention;

[0019] Figure 6 It is a schematic diagram of test results of using the SEA reference model established based on VAONE in a noise prediction process according to an embodiment of the present invention;

[0020] Figure 7 is a flow chart of step S20 of the acoustic package configuration method in one embodiment of the present invention;

[0021] Figure 8 is a schematic diagram of a computer device in one embodiment of the present invention. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] The present invention provides an acoustic package configuration method, such as Figure 1 As shown, the following steps are included:

[0024] S10, establishing a SEA reference model of a reference object based on VAONE; the SEA reference model includes initial material parameters of the reference object. The initial material parameters refer to relevant material parameters of the reference object. For example, when the reference object is a reference vehicle, the initial material parameters are the thickness and material properties of the actual vehicle sheet metal of the reference vehicle. Furthermore, when an acoustic package is already installed in the reference vehicle, the initial material parameters also include the distribution position of the acoustic package installed in the reference vehicle and the material properties of the acoustic package. In this step, in the process of establishing the SEA reference model of the reference object based on VAONE, the establishment of the board subsystem and the acoustic cavity subsystem of the reference object can be considered simultaneously, and the division of the acoustic cavity subsystem can be comprehensively considered before modeling), so as to plan the comprehensive division of the board subsystem and the acoustic cavity subsystem to ensure a better matching relationship between the board subsystem and the acoustic cavity subsystem. At the same time, when performing subsequent subsystem segmentation, avoid segmenting the components too much, thereby causing the problem of too low subsystem modal number in the SEA reference model, improve the accuracy of the entire SEA reference model, reduce the error of calculation and analysis, and also avoid to the greatest extent the deletion of the acoustic cavity subsystem and the board subsystem and repeated modeling due to the mismatch between the two in the subsequent process, thereby reducing modeling errors and improving modeling efficiency.

[0025] S20, obtain the external acoustic load of the reference object, and load the external acoustic load into the SEA reference model; in this embodiment, it is necessary to first obtain the external acoustic load of the reference object, wherein the external acoustic load includes the surface acoustic load corresponding to each acoustic cavity subsystem of the reference object and the main noise source load of the main noise source. To load the external acoustic load into the SEA reference model, it is necessary to first import the external acoustic load into VAONE, then load the surface acoustic load corresponding to each acoustic cavity subsystem of the reference object into the corresponding acoustic cavity subsystem in the SEA reference model, and then load the main noise source load (surface sound pressure level) of the main noise source into the acoustic cavity subsystem corresponding to the main noise source around the main noise source in the SEA reference model.

[0026] S30, obtaining leakage test parameters and overall noise test parameters of the reference object, and modifying the SEA reference model loaded with the external acoustic load according to the leakage test parameters and overall noise test parameters.

[0027] In this step, it is necessary to first have a clear understanding of the internal overall noise of the reference object. Therefore, in one embodiment, in step S30, before obtaining the overall noise test parameters of the reference object, the following steps are further included:

[0028] The reference object is tested for overall sound pressure level under different preset test conditions, and the overall noise test parameters of the reference object are obtained and stored in a database; the overall noise test parameters include the total sound pressure level of the specific position of the reference object under each preset test condition. Among them, the preset test conditions include: idling, rated speed, acceleration, high speed and uniform speed, common vehicle speed and other different conditions. The specific position can be set according to the actual needs of the reference object. For example, when the reference object is a reference car, its specific position can refer to the right ear of the main driver and the left ear of the co-driver; that is, in the reference car, the selection of the specific position is determined according to the position of the right ear of the person in the main driver's position or the left ear of the person in the co-driver's position in the car. That is, before correcting the SEA reference model loaded with the external acoustic load, there should be a clear understanding of the overall noise in the reference car (reflected by the overall noise test parameters), and then the SEA reference model should be reasonably corrected according to the overall noise test parameters.

[0029] Furthermore, if Figure 2 As shown, in the step S30, before obtaining the leakage test parameters of the reference object, the following steps are included:

[0030] S301, obtaining all leakage positions to be tested of the reference object; wherein, when the reference object is a reference car, the leakage positions to be tested may be air conditioning pressure equalizing holes, drainage holes, door handles, door gaps, side windows, etc. on the body in white.

[0031] S302, select a leakage position to be tested according to a preset rule (which can be randomly selected or selected according to a preset selection order), and seal all other leakage positions to be tested in the reference object except the selected leakage position to be tested; optionally, use tape to seal the leakage positions to be tested that may leak one by one (except the selected leakage position to be tested).

[0032] S303, inflate the reference object with air at a preset flow rate to obtain leakage parameters corresponding to the selected leakage position to be tested; the leakage parameters include leakage area; wherein, the reference object is inflated with air at a certain flow rate so that a certain pressure is reached inside the reference object. Since the input flow rate required to maintain the same pressure in the vehicle is related to the leakage area, for example, the initial input flow rate is 213cfm, and the input flow rate is reduced to 210cfm after blocking, then the flow rate change is 3cfm; and the flow rate change is proportional to the leakage area. Therefore, only one leakage area corresponding to the leakage position to be tested needs to be determined, and the relative leakage areas of other leakage positions to be tested can be obtained by analogy.

[0033] S304: Associate the leakage parameter and the corresponding leakage position to be tested and store them as leakage test parameters.

[0034] Understandably, if Figure 3 As shown, in step S30, the SEA reference model loaded with the external acoustic load is corrected according to the leakage test parameters and the overall noise test parameters, including:

[0035] S305 , loading the leakage parameter associated with the leakage position to be tested at the position corresponding to the leakage position to be tested in the SEA reference model; that is, after calculating the leakage parameter, loading it into the SEA reference model.

[0036] S306, calculating the overall noise level of the SEA reference model after loading the leakage parameter through VAONE and obtaining a first calculation result; wherein the first calculation result refers to the overall noise level test result of the SEA reference model of the reference object corresponding to the current leakage parameter.

[0037] S307, correcting the leakage position to be tested and / or the leakage parameters of the SEA reference model according to the first calculation result and the overall noise test parameters; that is, comparing the first calculation result and the overall noise test parameters, and correcting the leakage position to be tested and / or the leakage parameters of the SEA reference model according to the error between the two.

[0038] S308, calculating the overall noise level of the corrected SEA reference model through VAONE and obtaining a second calculation result; wherein the second calculation result refers to the overall noise level test result of the SEA reference model of the reference object after correcting the leakage parameter and / or correcting the leakage position to be tested.

[0039] S309: When the error between the second calculation result and the overall noise test parameter meets the preset error requirement, confirm that the correction of the SEA reference model is completed. Optionally, the preset error requirement means that the error between the second calculation result and the overall noise test parameter is controlled within the range of 3-5dBA.

[0040] S40, obtaining development material parameters of the object to be developed, replacing the initial material parameters in the SEA reference model with the development material parameters, and recording the SEA reference model containing the development material parameters as a SEA transplantation model; in this step, the corrected SEA reference model is used as the standard model, and the corrected SEA reference model is transplanted to the object to be developed in the model development stage, wherein the transplantation process mainly refers to replacing the initial material parameters (for example, sheet metal material thickness and material properties) in the standard model (corrected SEA reference model) with the development material parameter number of the object to be developed. At the same time, if the main noise source is replaced (that is, when the main noise source of the object to be developed is not the same as the main noise source type of the reference object, the main noise source of the object to be developed needs to be used as the main noise source to be replaced), it is also necessary to obtain the sound source load of the main noise source to be replaced through bench testing (detailed description is provided later), and then load it as the main noise source load of the main noise source to be replaced into the acoustic cavity subsystem corresponding to the main noise source to be replaced.

[0041] S50, performing an overall noise level test on the SEA transplant model and obtaining a test result, and configuring an acoustic package for the object to be developed according to the test result.

[0042] In one embodiment, if Figure 4 As shown, the step S50 includes:

[0043] S501, calculate the overall noise level of the SEA transplant model through VAONE and obtain the third calculation result; that is, in this step, the whole vehicle noise level of the development object is calculated using the transplanted SEA transplant model, and the third calculation result refers to the calculation result of the overall noise level of the whole vehicle noise level calculated by the SEA transplant model of the development object.

[0044] S502, obtaining the noise transfer path of the object to be developed, and configuring an acoustic package in the noise transfer path according to the third calculation result and the preset overall noise target value; that is, the preset overall noise target value is related to the benchmark object (such as a benchmark vehicle of the same type as the vehicle to be developed), and is generally determined according to the whole vehicle noise level of the benchmark object (for example, in the vehicle to be developed, it mainly refers to the whole vehicle noise level at the driver's right ear and the co-driver's left ear of the vehicle to be developed). For example, if we measure the sound pressure level of the driver's right ear of a benchmark vehicle to be 62dB(A), and the sound pressure level of the co-driver's left ear to be 63dB(A), then the preset overall noise target value of the vehicle to be developed can be set to the driver's right ear sound pressure level ≤62dB(A), and the co-driver's left ear sound pressure level ≤63dB(A). Understandably, the noise transmission path of the object to be developed can be determined according to the specific structure of the object to be developed. For example, taking the path of the engine noise of the vehicle to be developed to the right ear of the main driver as an example, one of the main paths for the noise radiated by the engine to be transmitted to the right ear of the main driver is the transmission path in which the noise radiated by the engine is transmitted to the main driver's position through the front surround, and then transmitted to the right ear of the main driver. On this transmission path, the front surround is the main component for isolating the engine radiation noise. At this time, if the overall noise level at the right ear of the main driver represented by the third calculation result is insufficient to the preset overall noise target value, that is, the sound pressure level of the right ear of the main driver is greater than 62dB(A), at this time, the sound pressure level of the right ear of the main driver can be reduced by designing and optimizing the acoustic package of the front surround.

[0045] S503, calculating the overall noise level of the SEA reference model after the acoustic package is configured through VAONE and obtaining a fourth calculation result; wherein the fourth calculation result refers to the calculation result of the overall noise level of the whole vehicle noise level calculated for the SEA transplanted model after the acoustic package of the development object is configured.

[0046] S504: When the error between the fourth calculation result and the preset overall noise target value meets the preset optimization requirement, confirm that the acoustic package configuration is completed. That is, when the error between the fourth calculation result and the preset overall noise target value meets the preset optimization requirement, it means that there is no need to optimize the noise transmission path. At this time, it means that the configuration of the acoustic package has been completed, and the object to be developed has achieved the purpose of reducing the noise level of the whole vehicle and meeting the initial design requirements.

[0047] The present invention equips the object to be developed (for example, the vehicle to be developed) with an acoustic package at the vehicle development stage, i.e., according to the test results of the overall noise level test of the SEA transplant model, and can reasonably configure the spatial range for installing the acoustic package. While ensuring the maximization of the noise reduction effect, it also avoids the modification of the structure of the object to be developed due to the installation of the acoustic package after the development is completed, thereby ensuring the safety and reliability of the structure of the object to be developed. At the same time, there is no need to incur modification costs, thereby reducing the overall development cost of the object to be developed. Moreover, the present invention has already performed an overall noise level test on the object to be developed after the acoustic package is configured during the development process, thereby shortening the verification period and reducing the verification cost.

[0048] In one embodiment, if Figure 5 As shown, the step S10, i.e., the SEA reference model of the reference object established based on VAONE, includes:

[0049] S101, obtaining the overall digital model of the reference object imported from the pre-processing module; wherein the overall digital model may be a 3D model of the reference object as a whole, and the format of the overall digital model may be a general format such as CATIA, PROE, UG, etc. The pre-processing software is preferably Hypermesh; of course, in the present invention, the pre-processing software may also be applicable processing software other than Hypermesh.

[0050] S102, obtaining the vibration and noise information of the reference object, and determining the first acoustic cavity structure division data of the overall digital model according to the vibration and noise information; in this step, the vibration and noise information of the reference object must first be obtained by performing vibration tests and noise tests on the reference object to obtain relevant test information. In the present invention, the vibration and noise information (when the reference object is a whole vehicle of a reference vehicle, the vibration and noise information is the vibration and noise information of the whole vehicle) can be used to assist in dividing the structure of the board subsystem and the acoustic cavity subsystem. In this step, the first acoustic cavity structure division data of the overall digital model is determined only by the vibration and noise information, that is, this process only plans the final overall modeling in the present invention according to the results of the vibration test and noise test (the content of the planning is the first acoustic cavity structure division data), and the acoustic cavity subsystem or the board subsystem is not divided in this step.

[0051] S103, perform model simplification processing on the overall digital model; wherein the overall digital model contains multiple parts, and one of the parts contains at least one part assembly; specifically, the model simplification processing on the overall digital model includes: deleting redundant geometric features in the overall digital model until the first boundaries between adjacent parts and the second boundaries between the parts assemblies are in a co-edge state; the redundant geometric features include one or more of redundant points, redundant lines, redundant surfaces, unnecessary holes and broken surfaces. The model simplification processing mainly cleans up irrelevant points, lines, surfaces, unnecessary holes and broken surfaces. After cleaning, the boundary conditions of the overall digital model are as follows: the first boundaries between adjacent parts (the overall digital model contains multiple parts, and one of the parts contains at least one part assembly) and the second boundaries between the parts assemblies are in a co-edge state. In this way, it is beneficial to perform meshing and establish a board subsystem or a sound cavity subsystem later. It is understandable that in the present invention, the acoustic cavity subsystem needs to be established through the board system. Therefore, when entering the pre-processing module for pre-processing, it is necessary to perform geometric cleaning and division (that is, model simplification processing) on ​​the components (and their parts assemblies) corresponding to the board system in the overall digital model according to the first acoustic cavity structure division data planned in step S102. This process is to ensure a better matching relationship between the board system and the acoustic cavity subsystem, and avoid the subsequent process. The acoustic cavity subsystem and the board system are deleted due to the mismatch between the two, and the modeling is repeated, which ultimately leads to errors and inefficiency.

[0052] S104, obtaining the component boundary data in the overall digital model, dividing the overall digital model into several model components according to the first acoustic cavity structure division data and the component boundary data, and assigning component attributes to each of the model components; in this step, the overall digital model is divided according to the first acoustic cavity structure division data used for planning the structure of the board subsystem and the acoustic cavity subsystem in the early stage, combined with the component boundary data between the various parts and components in the overall digital model and between the various part components of the parts. Specifically, the division principle is: try to ensure the integrity of the various part components in the parts, give priority to dividing a part component into a model component, and try not to divide the part components that must be divided too fragmented (that is, the number of model components obtained after the same part component is divided can be set not to exceed a preset number threshold). In the present invention, taking the acoustic cavity space of the cab corresponding to the reference vehicle in the overall digital model (the acoustic cavity space of the cab can be regarded as a component, and each front and rear row space in each of the upper and lower layers of the component can be regarded as a part assembly) as an example, there are mainly two division methods (but not limited to these two): the first is to divide each part assembly into two model components according to left-right symmetry. Finally, the acoustic cavity space of the cab can be divided into two layers, which are left-right symmetrical, with the front and rear rows as the boundary, and is divided into 8 model components in total; the second method is: divided into two layers, left, middle and right, with the geometric boundary of the top skylight as the boundary, and the front and rear rows as the boundary, and is divided into 12 model components in total. It is understandable that the finer the division of the model components, the closer it will be to the test observation point, but the finer the division of the model components, the more fragmented the board system will be divided accordingly, which can easily cause the number of modes to be too small. Therefore, in the present invention, the overall digital model is divided into several model components according to the first acoustic cavity structure division data and the component boundary data. On the premise of being close to the test observation point, the board system will not be divided too small, thereby achieving the rationality of the model component division of the overall digital model. That is, while ensuring the consistency of the geometric shape of the subsystem with the actual digital model of the reference object and improving the efficiency of modeling, it also ensures that each subsystem meets the requirements of the number of modes required for analysis.

[0053] It can be understood that each of the component attributes includes a component ID code; the allocation of component attributes to each of the model components includes:

[0054] Component attributes are assigned to each of the model components according to a preset attribute assignment rule, and the preset attribute assignment rule includes: one model component corresponds to one component attribute, and the component attributes of two adjacent model components contain different component ID codes. That is, when the same part component is divided into two or more model components, it is necessary to assign component attributes to the two or more divided model components (component attributes can be set according to requirements, such as: material attributes, thickness, etc.); for example, a component component_1 of a part is divided into two parts, and it is necessary to divide it into two components component_1-1 and component_1-2; at the same time, since component attributes are related to the subsequent division of subsystems (an important principle for establishing the SEA reference model division subsystem is that components with the same component attributes can be divided into the same subsystem), therefore, corresponding groups are established for all components. Part attributes; understandably, the component attributes of the model components split from the same part assembly are the same, but it is necessary to establish a corresponding component ID code for each model component attribute (the component ID code can be a combination code of numbers, letters or symbols used to identify a model component), and the component ID codes between adjacent model components must be different; but in the present invention, if non-adjacent model components have the same component attributes, they can also be assigned component attributes with the same component ID code; in this way, after importing it into VAONE, it can be used to distinguish the grids adjacent to the grids after each model component is divided, so as to facilitate one-click selection of the required grid, thereby establishing the required board system according to the grid nodes corresponding to the selected grid.

[0055] S105, meshing the overall digital model, obtaining the overall first finite element model of the reference object including the first mesh node, and exporting the first finite element model as a first file of Nastran type; wherein, meshing the overall digital model, the overall digital model after meshing can reflect the overall geometric features of the reference object, so that the overall digital model after meshing has a high degree of fit with the actual model of the reference object, especially to ensure the fit of the irregular surface of the overall digital model with the actual model of the reference object. It can be understood that in the present invention, the fit of the irregular surface of the overall digital model with the actual model of the reference object can be controlled by a reasonable mesh size. At the same time, when dividing the subsystem (the board subsystem and the acoustic cavity subsystem mentioned later), the integrity of the geometric structure of the irregular surface is guaranteed as much as possible, thereby further ensuring the fit of the SEA reference model finally generated with the irregular surface of the actual model of the reference object. In this embodiment, after obtaining the first finite element model of the reference object including the first mesh node, it is exported to a corresponding Nastran type file (.bdf format). In the present invention, the overall finite element model of the reference object is exported as a whole into a window for modeling, so that the selection of network nodes and the real-time viewing of the connection status between each subsystem can be more accurate and fast. Although the multi-window modeling in the prior art can also view the connection between subsystems in real time, it is necessary to copy the models under multiple windows to one window for inspection (the overall digital model is composed of many parts, so the model of the overall digital model is complex, which makes the process complicated). In this way, if there is a disconnection between the subsystems, it is necessary to first delete the disconnected subsystem, and then re-establish the partially deleted subsystem and copy it to one window for inspection. In this process, the error between the repeatedly established subsystem and the subsystem that has not been deleted is larger, which is not conducive to the accuracy and efficiency of modeling.

[0056] S106, importing the first file into VAONE, selecting the first grid node according to the preset node selection rule, and establishing multiple board subsystems according to the selected first grid node; that is, after importing the file into VAONE, the preset node selection rule includes: first, determining that the overall digital model contains model components corresponding to irregular surfaces that are difficult to construct through a single flat plate or curvature plate (after grid division), and then, the first direct generation module in VAONE (the first direct generation module is used to directly generate the required board subsystem according to the first grid node of the model component corresponding to the irregular surface) can be used to generate the required board subsystem. In this way, it is possible to avoid dividing the irregular surface into multiple small board subsystems again, thereby ensuring the integrity of the geometric structure of the irregular surface, and further ensuring the fit between the finally generated SEA reference model and the irregular surface of the actual model of the reference object, and not causing the number of modes to be too small. Secondly, for the model component corresponding to the regular surface (after meshing), combined with the mesh nodes imported after its own meshing and the mesh nodes of the adjacent model components (when importing the finite element model, the mesh nodes are imported together), manually select mesh nodes to establish the plate system corresponding to the selected mesh nodes (manually selecting nodes means selecting from the imported mesh nodes, and the selection principle is: mainly selecting mesh boundary nodes, and at the same time ensuring that the geometric features of the plate system are consistent with the geometric features of the finite element model corresponding to this part, so as to ensure the degree of consistency between the SEA reference model finally established and the actual model of the reference object). Alternatively, manual selection can be omitted, and the required plate system can be generated directly using the second direct generation module (the second direct generation module is used to directly generate the required plate system based on the first mesh nodes of the model component containing the regular surface).

[0057] S107, after determining that the first connection state between each of the board subsystems is correct, establish multiple sound cavity subsystems according to the first sound cavity structure division data; that is, in the present invention, the connection inspection tool in VAONE can be used to detect whether the first connection state between each of the board subsystems is correct. If correct, the sound cavity subsystem can be established according to the first sound cavity structure division data. If there is an error, it is necessary to re-establish each board subsystem, and prompt the incorrect grid node information (the incorrect grid node information refers to the incorrect node position, the cause of the error or the solution, etc.), and then, according to the incorrect grid node information, the grid node can be readjusted (that is, the second grid node after adjustment is obtained), and a new board subsystem is re-established according to the second grid node; and then enter the subsequent steps.

[0058] S108, after confirming that the second connection status between each of the acoustic cavity subsystems and the third connection status between the board subsystem and the acoustic cavity subsystem are correct, configure the structural properties of the board subsystem according to the initial material parameters of the reference object, and confirm that the SEA reference model of the reference object is established. That is, the connection inspection tool in VAONE can be used to detect whether the second connection state between each of the acoustic cavity subsystems is incorrect, and at the same time detect whether the third connection state between the board subsystem and the acoustic cavity subsystem is correct; after confirming that the second connection state between each of the acoustic cavity subsystems and the third connection state between the board subsystem and the acoustic cavity subsystem are correct, it is first necessary to configure the structural properties of the board subsystem according to the initial material parameters of the reference object. For example, when the reference object is a reference vehicle, the sheet metal thickness and material properties of the board subsystem of the reference vehicle are first set. Furthermore, when an acoustic package is installed in the reference vehicle, configuring the structural properties of the board subsystem according to the initial material parameters of the reference object also includes configuring the distribution position of the acoustic package and the material properties of the acoustic package. After setting the relevant acoustic package in the SEA reference model, it is confirmed that the establishment of the SEA reference model of the reference vehicle is completed.

[0059] Furthermore, when at least one of the second connection state or the third connection state is incorrect, it is necessary to prompt the erroneous sound cavity structure information corresponding to the erroneous second connection state or the third connection state (the erroneous sound cavity structure information refers to the erroneous network node position, the cause of the error, the solution, or the unreasonable first sound cavity structure division data that causes the second connection state or the third connection state to be incorrect, etc.); and, in the erroneous sound cavity structure information, when the cause of the erroneous second connection state or the third connection state is the erroneous network node position, the grid node can be readjusted, and a new board system can be re-established based on the adjusted grid node; and then proceed to the subsequent steps. On the other hand, in the erroneous acoustic cavity structure information, when the cause of the second connection state or the third connection state being incorrect is unreasonable first acoustic cavity structure division data, it is necessary to readjust the first acoustic cavity structure division data to second acoustic cavity structure division data according to the erroneous acoustic cavity structure information, and divide the overall digital model into several model components according to the second acoustic cavity structure division data and the component boundary data, and assign component attributes to each of the model components, and then proceed to the subsequent steps according to steps S101-S108.

[0060] It can be understood that in this embodiment, the first connection state refers to the connection state between each board subsystem established according to the grid node (including the first grid node, the second grid node, the third grid node or the fourth grid node), the second connection state refers to the connection state between each acoustic cavity subsystem established according to the acoustic cavity structure division data (including the first acoustic cavity structure division data or the second acoustic cavity structure division data); and the third connection state refers to the connection state between the above-mentioned board subsystem established according to the grid node and the acoustic cavity subsystem established according to the acoustic cavity structure division data.

[0061] Understandably, due to the complexity of the overall digital model, the propagation of air sound inside the reference object is mainly simulated by establishing an acoustic cavity subsystem inside it, and the division of the acoustic cavity subsystem inside the reference object is different due to the difference in the overall digital model. The final acoustic cavity subsystem is established based on the board subsystem. In this embodiment, the establishment of the board subsystem and the acoustic cavity subsystem are considered simultaneously, and the division of the acoustic cavity subsystem is comprehensively considered before modeling (that is, the first acoustic cavity structure division data of the overall digital model is determined according to the vibration and noise information), so as to plan the comprehensive division of the board subsystem and the acoustic cavity subsystem. In this way, the purpose of the model simplification processing stage in the pre-model processing is stronger, the model simplification is more accurate, and a better matching relationship between the board subsystem and the acoustic cavity subsystem is ensured. At the same time, when performing subsequent subsystem segmentation, it is avoided to segment each component too fragmented, thereby causing the problem of too low subsystem modal number in the SEA reference model, improving the accuracy of the entire SEA reference model, reducing the error of calculation and analysis, and also avoiding the deletion of the acoustic cavity subsystem and the board subsystem and repeated modeling due to the mismatch between the two in the subsequent process to the greatest extent, thereby reducing the modeling error and improving the modeling efficiency. like Figure 6 As shown, when the SEA reference model based on VAONE in the present invention is actually applied to the interior of a reference object, such as the interior of a reference vehicle, and then to predict the noise near the right ear of the driver in the vehicle, the accuracy is improved compared to the modeling method in the prior art, and the predicted data is basically consistent with the measured data.

[0062] In this embodiment, before modeling, the first acoustic cavity structure division data is determined according to the vibration and noise information of the reference object obtained through actual testing (that is, the structural division of the acoustic cavity subsystem is planned in advance). The first acoustic cavity structure division data can determine the direction of the board subsystem division of each component of the reference object. In this way, the first acoustic cavity structure division data plays a guiding role in the model simplification process, making the simplified results of the model simplification process more accurate. At the same time, when the model components are divided according to the component boundary data, it can be avoided that the part components in the components are divided too finely, thereby avoiding the situation where the modal number of the board subsystem in the finally generated SEA reference model is too low, improving the accuracy of the SEA reference model and reducing the modeling error. In addition, since the first finite element model is the premise for establishing the SEA reference model, the board subsystem is directly established according to the selected first grid node. The geometric shape of the board subsystem is closer to the overall digital model, which can improve the accuracy and efficiency of modeling. Thirdly, by exporting the first file corresponding to the overall digital model as a whole, the overall modeling of the reference object can be realized in one window. In this way, the real-time viewing of the connection status between the board subsystem and / or the acoustic cavity subsystem is more accurate and rapid (when modeling in multiple windows, it is necessary to copy the submodels under multiple windows to the same window to check the connection status, and when there is a disconnection between the subsystems, it is necessary to delete the disconnected subsystems and then re-establish the subsystems. In this way, there is a process of re-matching the subsystems established in different batches, which is not conducive to the accuracy and efficiency of modeling).

[0063] In one embodiment, in step S106, after establishing a plurality of board subsystems according to the selected first grid nodes, the step further includes:

[0064] When it is determined that the first connection state between each of the board subsystems is incorrect, the incorrect grid node information corresponding to the incorrect first connection state is prompted; the first grid node is adjusted according to the incorrect grid node information, the second grid node is obtained, and a new board subsystem is re-established according to the second grid node; after determining that the first connection state between each of the new board subsystems is correct, multiple sound cavity subsystems are established according to the first sound cavity structure division data; after confirming that the second connection state between each of the sound cavity subsystems and the third connection state between the board subsystem and the sound cavity subsystem are correct, it is confirmed that the SEA reference model of the reference object is established. That is, in this embodiment, if it is determined that the first connection state between each of the board subsystems is incorrect, each board subsystem needs to be re-established, and the incorrect grid node information (the incorrect grid node information refers to the incorrect node position, the cause of the error or the solution, etc.) is prompted, and then, according to the incorrect grid node information, the grid node can be readjusted (that is, the adjusted second grid node is obtained), and a new board subsystem is re-established according to the second grid node; and then enter the subsequent steps.

[0065] In one embodiment, in step S107, after establishing a plurality of acoustic cavity subsystems according to the first acoustic cavity structure division data, the method further includes:

[0066] When it is confirmed that the second connection state between each of the acoustic cavity subsystems or / and the third connection state between the board subsystem and the acoustic cavity subsystem is incorrect, the incorrect information corresponding to the incorrect second connection state or / and the third connection state is prompted; when the incorrect information contains incorrect acoustic cavity structure information, the first acoustic cavity structure is adjusted according to the incorrect acoustic cavity structure information, and the second acoustic cavity structure division data is obtained. According to the second acoustic cavity structure division data and the component boundary data, the overall digital model is divided into several model components, and component attributes are assigned to each of the model components; the overall digital model is re-grid-divided to obtain the overall second finite element model of the reference object containing the third grid node, and the The second finite element model is exported as a second file of Nastran type; the second file is imported into VAONE, a third mesh node is selected according to a preset node selection rule, and a plurality of new board subsystems are established according to the selected third mesh nodes; after determining that the first connection state between each of the new board subsystems is correct, a plurality of new acoustic cavity subsystems are established according to the second acoustic cavity structure division data; after confirming that the second connection state between each of the new acoustic cavity subsystems and the third connection state between the new board system and the new acoustic cavity subsystem are correct, the structural properties of the board system are configured according to the initial material parameters of the reference object, and it is confirmed that the SEA reference model of the reference object is established.

[0067] That is, in this embodiment, the connection inspection tool in VAONE can be used to detect whether the second connection state between each of the acoustic cavity subsystems and the third connection state between the board subsystem and the acoustic cavity subsystem are incorrect. When at least one of the second connection state or the third connection state is incorrect, it is necessary to prompt the error information corresponding to the incorrect second connection state or / and the third connection state (wherein the error information may include incorrect acoustic cavity structure information or / and incorrect grid node information; the incorrect grid node information refers to the incorrect node position, the cause of the error or the solution, etc.; the incorrect acoustic cavity structure information refers to the incorrect network node position, the cause of the error, the solution or the unreasonable first acoustic cavity structure division data that causes the second connection state or the third connection state to be incorrect, etc.); and, in the error information If there is erroneous acoustic cavity structure information (including two situations, one is that only erroneous acoustic cavity structure information exists in the erroneous information; the other is that erroneous acoustic cavity structure information and erroneous grid node information exist in the erroneous information), since the erroneous acoustic cavity structure information will lead to the generation of erroneous grid node information when meshing, therefore, it is first considered that the cause of the error in the first connection state or / and the third connection state is unreasonable first acoustic cavity structure division data. At this time, it is necessary to readjust the first acoustic cavity structure division data to the second acoustic cavity structure division data according to the erroneous acoustic cavity structure information, and divide the overall digital model into several model components according to the second acoustic cavity structure division data and the component boundary data, and assign component attributes to each of the model components, and then proceed to the subsequent steps according to steps S101-S108.

[0068] In one embodiment, after prompting the error information corresponding to the erroneous second connection state or / and third connection state, the method further includes:

[0069] When the erroneous information only contains erroneous grid node information, the first grid node is adjusted according to the erroneous grid node information, the fourth grid node is obtained, and multiple new board subsystems are re-established according to the fourth grid node; after determining that the first connection state between each of the new board subsystems is correct, multiple sound cavity subsystems are established according to the first sound cavity structure division data; after confirming that the second connection state between each of the sound cavity subsystems and the third connection state between the board subsystem and the sound cavity subsystem are correct, it is confirmed that the SEA reference model of the reference object is established. That is, in this embodiment, when the second connection state or / and the third connection state are incorrect, if it is determined that only erroneous grid node information exists in the erroneous information corresponding to the incorrect second connection state or / and the third connection state, at this time, the grid node is directly readjusted according to the erroneous grid node information (that is, the fourth grid node after adjustment is obtained), and a new board subsystem is re-established according to the fourth grid node; and then proceed to the subsequent steps.

[0070] It can be understood that, in one embodiment, the external acoustic load includes a surface acoustic load corresponding to each acoustic cavity subsystem of the reference object; Figure 7 As shown, before step S20, that is, before obtaining the external acoustic load of the reference object, the following steps are included:

[0071] S201, obtaining a division structure of each acoustic cavity subsystem in the SEA reference model;

[0072] S202, determining the distribution areas corresponding to each acoustic cavity subsystem on the surface of the reference object according to the division structure; by building a surface external acoustic cavity (that is, an acoustic cavity subsystem) on the surface of the SEA reference model, the external sound field of the reference object as a whole can be simulated, wherein the acoustic cavity subsystem here refers to the acoustic cavity outside the vehicle, not the acoustic cavity inside the vehicle, wherein one acoustic cavity subsystem refers to a cavity constituted by the surface of the reference object and a space at a certain distance therefrom within a certain range of the surface of the reference object; taking the main driver's seat of the reference vehicle as an example, the acoustic cavity subsystem corresponding to the top of the main driver's seat refers to a cavity constituted by the ceiling at the main driver's seat and a space at a certain distance from the outside.

[0073] S203, performing a surface acoustic load test on the reference object in a preset test environment, and determining the surface acoustic load corresponding to each acoustic cavity subsystem according to the sound source data collected by a sound collection device; the sound collection device is arranged in each of the distribution point areas on the surface of the reference object.

[0074] Among them, at least one sound collection device is attached to the surface of the distribution area corresponding to each acoustic cavity subsystem (for example, three microphones are set in one distribution area; the microphone is attached to the surface of the distribution area to prevent the vibration of the sensor from affecting the test results). Then, under the preset test environment, the source data obtained by each sound collection device in the distribution area is obtained for each working condition, and then the surface acoustic load is determined. Optionally, each working condition can be tested three times (or other times set according to needs, such as more than three times), and then the three sound source data obtained by the three sound collection devices in the same distribution area in the three tests are obtained, and then the nine sound source data obtained are averaged, and then it is determined as the surface acoustic load of the distribution area.

[0075] Among them, the background noise in the preset test environment is much lower than the noise generated by the reference object (such as a reference car) itself, and does not affect the noise generated by the reference object itself. For example, the preset test environment can be a semi-anechoic chamber with a rotating drum (the rotating drum is mainly used to cooperate with the test under the load condition. For example, the load condition requires the reference car to be tested for the surface acoustic load of the whole vehicle at a certain speed, and the setting of the semi-anechoic chamber is mainly to eliminate the impact of background noise on the test results), or it can refer to a relatively quiet and smooth road. Understandably, according to the left-right symmetry of the whole vehicle structure, when testing the surface acoustic load corresponding to each acoustic cavity subsystem, if the reference object is a reference car, at this time, according to the symmetry of the reference car, it is only necessary to measure the surface acoustic load of the corresponding distribution area on the left or right side of the whole vehicle of the reference car, and the surface acoustic load at the symmetrical position can be mapped according to the symmetry principle. In this way, the processing amount of test data can be reduced, and the processing efficiency and speed can be improved.

[0076] In another embodiment, the external acoustic load further includes a main noise source load of a main noise source of the reference object; in the above embodiment, after performing a surface acoustic load test on the reference object in a preset test environment in step S203, the step further includes:

[0077] The surface sound pressure level measured by the sensor device arranged on the surface of the main noise source is obtained, and the surface sound pressure level is recorded as the main noise source load of the main noise source. That is, if the reference object is a reference vehicle, at this time, the main noise source may refer to the engine or powertrain part of the reference vehicle (that is, the part of the reference object that generates the main noise); by building a surface external acoustic cavity (that is, an acoustic cavity subsystem) on the surface of the main noise source of the SEA reference model, the external sound field of the main noise source of the reference object can be simulated, wherein the acoustic cavity subsystem here refers to the acoustic cavity outside the vehicle, not the acoustic cavity inside the vehicle, wherein the acoustic cavity subsystem corresponding to the main noise source outside refers to a cavity formed by the outer surface of the main noise source and the space at a certain distance from it within a certain range of the outer surface of the main noise source; taking the engine as an example, the acoustic cavity subsystem corresponding to the engine refers to the cavity formed by the outer surface of the engine and the space at a certain distance from the outside. In this embodiment, it is necessary to arrange corresponding sensing devices on the surface of the main noise source to directly obtain its surface sound pressure level, and then load the surface sound pressure level as the main noise source load of the main noise source. If the main noise source needs to be replaced later, there is no need to perform a whole vehicle test and re-obtain the main noise source load. Instead, the surface sound pressure level (sound source load) of the main noise source to be replaced can be inferred from the bench test results alone, and then loaded as the main noise source load of the main noise source to be replaced to the sound cavity subsystem corresponding to the main noise source to be replaced.

[0078] Furthermore, in the above process of the present invention, the process of obtaining the sound source load of the main noise source to be replaced through bench testing specifically includes:

[0079] In the bench test of the main noise source to be replaced, the first sound source data of the first test point of the main noise source to be replaced is obtained; the first test point refers to a test point with a preset distance from the surface of the main noise source to be replaced; wherein the preset distance can be set according to the demand, and the main noise source to be replaced is preferably an engine, a motor, etc. of a vehicle. In the present invention, the preset distance is preferably 1 meter. In this step, the sound source characteristics of the first test point with a preset distance from the surface of the main noise source to be replaced can be accurately obtained in the bench test of the engine bench laboratory; that is, in the bench test, the main noise source to be replaced is vibrated at a preset vibration frequency, and after obtaining the first sound pressure level corresponding to the preset vibration frequency measured by the sound source acquisition device (the sound source acquisition device is a microphone installed at the first test point and can directly measure the first sound pressure level of the first test point), the first sound pressure level and the corresponding preset vibration frequency are associated and stored as the first sound source data.

[0080] According to the first sound source data and the preset surface sound pressure model, the second sound source data of the second test point of the main noise source to be replaced in the bench test is determined; the second test point refers to the test point located on the surface of the main noise source to be replaced; it is understandable that according to the first sound source data and the preset surface sound pressure model, the second sound pressure level of the second test point of the main noise source to be replaced (the test point located on the surface of the main noise source to be replaced) at the preset vibration frequency can be determined, and the second sound pressure level and the corresponding preset vibration frequency are the second sound source data. Among them, the preset surface sound pressure model can be determined by the following attenuation equation, sound intensity and sound pressure relationship model, and sound pressure level conversion model.

[0081] First, the attenuation equation of sound intensity in air is:

[0082]

[0083] Wherein, I2 is the sound intensity at the first reference point (the first reference point is a test point at a distance x1 from the surface of the main noise source to be replaced); I1 is the sound intensity at the second reference point (the second reference point is a test point at a distance x2 from the surface of the main noise source to be replaced); m is the attenuation coefficient of sound intensity per meter in air; x1 is the distance between the second reference point and the surface of the main noise source to be replaced; x2 is the distance between the first reference point and the surface of the main noise source to be replaced; e is a natural constant;

[0084] Secondly, the relationship model between sound intensity and sound pressure includes:

[0085] I1=P1 2 / ρc

[0086] I2=P2 2 / ρc

[0087] Wherein, ρ is the air density; c is the speed of sound in the air; P1 is the sound pressure to be measured at the second reference point; P2 is the sound pressure to be measured at the first reference point;

[0088] Again, the sound pressure level conversion model for converting sound pressure to sound pressure level includes:

[0089]

[0090]

[0091] Where: P0 is the reference sound pressure. As can be seen from the above, according to the attenuation equation, the sound intensity and sound pressure relationship model and the sound pressure level conversion model, it can be determined that:

[0092]

[0093] However, in the above equation, the unit of the attenuation coefficient m of the sound intensity per meter in the air needs to be converted into dB / m. In this way, m needs to be multiplied by 4.343, and the preset surface sound pressure model that can be used to calculate the second sound pressure level of the second reference point of the main noise source to be replaced is finally obtained:

[0094]

[0095] in: is the second sound pressure level of the second reference point; is the first sound pressure level of the first reference point; m is the attenuation coefficient of sound intensity per meter in air (in dB / m); x1 is the distance between the second reference point and the surface of the main noise source to be replaced, and in the present invention, if the second reference point is the second test point, then the x1 corresponding to the second test point is 0; x2 is the distance between the first reference point and the surface of the main noise source to be replaced, and in the present invention, if the first reference point is the first test point, then the x2 corresponding to the first test point is the preset distance (for example, preferably 1 meter); e is a natural constant.

[0096] In summary, according to the above preset surface sound pressure model, the second sound pressure level at the second test point can be determined according to the first sound pressure level at the first test point, thereby obtaining the second sound source data.

[0097] Obtain the corrected error of the main noise source to be replaced in the bench test; understandably, the corrected error is the difference between the overall test sound pressure level of the main noise source to be replaced tested at the same test frequency (the main noise source to be replaced is installed in the overall test object for overall testing, such as a whole vehicle test for a whole vehicle) and the bench test sound pressure level (the main noise source to be replaced is installed on a test bench for bench testing). That is, in fact, the sound source load that the present invention ultimately needs to determine is the sound source load of the main noise source to be replaced assembled in the overall test object during use (corresponding to the overall test of the overall test object, such as the whole vehicle test). The second sound pressure level (second sound source data) obtained in the above step is the sound source data obtained in the bench test. Therefore, there is a certain error between the two. At this time, due to the overall test and the bench test, the main error between the two is that during the overall test, the main noise source to be replaced (such as the engine in the whole vehicle) will not only cause its own noise and vibration, but also drive other parts of the overall test object to vibrate and make sounds, such as driving the body of the whole vehicle to vibrate and make sounds, thereby affecting the sound source characteristics of the main noise source to be replaced (engine) itself; therefore, when determining the sound source load of the main noise source to be replaced in the overall test object, it is necessary to correct this part of the error by correcting the error, and the error correction is:

[0098]

[0099] in, It is the overall test sound pressure level of the main noise source surface to be replaced in the overall test object of the overall test quiet laboratory, L P′ The bench test sound pressure level on the surface of the main noise source to be replaced measured when the bench test is carried out on the test bench for the same main noise source to be replaced; It is understandable that the correction error, the overall test sound pressure level and the bench test sound pressure level calculated in the above correction error formula all correspond to the same test frequency of the main noise source to be replaced.

[0100] In this step, the error correction does not involve physical correction of the test process (physical correction refers to error correction of the test position, accuracy correction of reading selection, etc. Physical correction is usually performed by averaging data from multiple measurements and improving the accuracy of the measurement means, etc.). Instead, it is based on accurate data measurement (that is, no physical correction is required or the physical correction has been performed or is delayed). When a single main noise source to be replaced is embedded in a system (such as the overall test object), the system will affect the sound field around the main noise source to be replaced (the principle of sound wave phase superposition). This step corrects this part of the error. The correction method of this step simplifies the overall test object in which the main noise source to be replaced (such as the engine, that is, the noise source) is embedded as an overall constraint. When the main noise source to be replaced is subjected to bench testing on the test bench, the second surface sound pressure level L on the surface of the main noise source to be replaced is measured. P′ , which is the standard sound pressure level of the main noise source to be replaced. The main noise source to be replaced will affect the surrounding sound field in the overall test object (that is, generate surrounding noise). At this time, the first surface sound pressure level of the main noise source to be replaced in the overall test object of the overall test silent laboratory is obtained. That is, the sound pressure level of the main noise source to be replaced in the overall test object with surrounding noise, then With L P′ The difference between them can be used as the correction error of the main noise source to be replaced. It can be understood that the correction error is only related to the overall test object system and has nothing to do with other values.

[0101] The sound source load of the second test point is determined according to the corrected error and the second sound source data. That is, according to the corrected error, the error of the second sound pressure level in the second sound source data can be determined and corrected, thereby accurately determining the final sound source load required for the second test point.

[0102] The sound source load test method of the present invention fully considers the attenuation effect of sound waves in the medium, and also considers the influence of the overall test object on the main noise source to be replaced when the main noise source to be replaced is coupled in the overall test object. Through calculation and correction, a sound source load that can more accurately describe the characteristics of the sound source can be obtained, and the test result is more accurate; and the present invention does not need to arrange a large number of points in the overall test, which simplifies the overall test process and reduces the test cost; and for locations where point arrangement is dangerous or cannot be arranged, the required sound source load can still be accurately obtained under the condition of canceling the point arrangement test of the point arrangement position, thereby reducing the test difficulty and risk factor; and the sound source load test method of the present invention can calculate the sound source load at any distance from the main noise source to be replaced as needed, thereby improving its applicability.

[0103] In one embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as follows: Figure 8 As shown. The computer device includes a processor, a memory, a network interface and a database connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, computer-readable instructions and a database. The internal memory provides an environment for the operation of the operating system and computer-readable instructions in the non-volatile storage medium. When the computer-readable instructions are executed by the processor, an acoustic package configuration method is implemented.

[0104] In one embodiment, a computer device is provided, including a memory, a processor, and computer-readable instructions stored in the memory and executable on the processor, wherein the processor implements the acoustic package configuration method when executing the computer-readable instructions.

[0105] In one embodiment, a computer-readable storage medium is provided, on which computer-readable instructions are stored. When the computer-readable instructions are executed by a processor, the above-mentioned acoustic package configuration method is implemented.

[0106] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through computer-readable instructions, and the computer-readable instructions can be stored in a non-volatile computer-readable storage medium. When the computer-readable instructions are executed, they can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided by the present invention can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), memory bus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0107] Those skilled in the art will clearly understand that for the sake of convenience and brevity of description, only the division of the above-mentioned functional units or modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional units or modules as needed, that is, the internal structure of the system can be divided into different functional units or modules to complete all or part of the functions described above.

[0108] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A method for configuring an acoustic package, characterized in that: include: Establish SEA reference model of reference objects based on VAONE; The SEA reference model contains initial material parameters of the reference object; Acquire the external acoustic load of the reference object, and load the external acoustic load into the SEA reference model; wherein the external acoustic load includes the surface acoustic load corresponding to each acoustic cavity subsystem of the reference object and the main noise source load of the main noise source; Acquiring leakage test parameters and overall noise test parameters of the reference object, and modifying the SEA reference model loaded with the external acoustic load according to the leakage test parameters and the overall noise test parameters; Acquire development material parameters of the object to be developed, replace the initial material parameters in the SEA reference model with the development material parameters, and record the SEA reference model including the development material parameters as a SEA transplant model; Performing an overall noise level test on the SEA transplant model and obtaining the test result, and configuring an acoustic package for the object to be developed according to the test result; The SEA reference model for establishing reference objects based on VAONE includes: Obtain the overall digital model of the reference object imported from the pre-processing module; Acquiring vibration and noise information of the reference object, and determining first acoustic cavity structure division data of the overall digital model according to the vibration and noise information; Performing model simplification processing on the overall digital model; Acquire component boundary data in the overall digital model, divide the overall digital model into a plurality of model components according to the first acoustic cavity structure division data and the component boundary data, and assign component attributes to each of the model components; Meshing the overall digital model to obtain an overall first finite element model of the reference object including a first mesh node, and exporting the first finite element model as a first file of Nastran type; Importing the first file into VAONE, selecting a first grid node according to a preset node selection rule, and establishing multiple board subsystems according to the selected first grid node; After determining that the first connection states between the board subsystems are correct, establishing a plurality of acoustic cavity subsystems according to the first acoustic cavity structure division data; After confirming that the second connection state between each of the acoustic cavity subsystems and the third connection state between the board subsystem and the acoustic cavity subsystem are correct, the structural properties of the board subsystem are configured according to the initial material parameters of the reference object, and confirming that the SEA reference model of the reference object is established.

2. The acoustic package configuration method according to claim 1, characterized in that: The external acoustic load includes a surface acoustic load corresponding to each acoustic cavity subsystem of the reference object; Before obtaining the external acoustic load of the reference object, the method includes: Obtaining the division structure of each acoustic cavity subsystem in the SEA reference model; Determine, according to the division structure, the point distribution areas corresponding to each acoustic cavity subsystem on the surface of the reference object; A surface acoustic load test is performed on the reference object in a preset test environment, and the surface acoustic load corresponding to each acoustic cavity subsystem is determined based on the sound source data collected by a sound collection device; the sound collection device is arranged in each of the distribution point areas on the surface of the reference object.

3. The acoustic package configuration method according to claim 2, characterized in that: The external acoustic load also includes a main noise source load of a main noise source of the reference object; After performing the surface acoustic load test on the reference object in the preset test environment, the method further includes: A surface sound pressure level measured by a sensor device disposed on the surface of the main noise source is obtained, and the surface sound pressure level is recorded as a main noise source load of the main noise source.

4. The acoustic package configuration method according to claim 1, characterized in that: Before obtaining the overall noise test parameters of the reference object, the method further includes: The reference object is subjected to an overall sound pressure level test under different preset test conditions, and an overall noise test parameter of the reference object is obtained and stored in a database; the overall noise test parameter includes a total sound pressure level at a specific position of the reference object under each preset test condition.

5. The acoustic package configuration method according to claim 1, characterized in that: Before obtaining the leakage test parameters of the reference object, the method includes: Obtaining all leakage locations to be tested of the reference object; A leakage position to be tested is selected according to a preset rule, and other leakage positions to be tested in the reference object except the selected leakage position to be tested are blocked; Inflate the reference object with a preset flow rate to obtain leakage parameters corresponding to the selected leakage position to be tested; the leakage parameters include leakage area; The leakage parameter and the corresponding leakage position to be tested are associated and stored as leakage test parameters.

6. The acoustic package configuration method according to claim 5, characterized in that: The step of modifying the SEA reference model loaded with the external acoustic load according to the leakage test parameter and the overall noise test parameter includes: Loading the leakage parameter associated with the leakage position to be tested at a position corresponding to the leakage position to be tested in the SEA reference model; Calculate the overall noise level of the SEA reference model after loading the leakage parameter through VAONE and obtain a first calculation result; Correcting the leakage position to be tested and / or the leakage parameter of the SEA reference model according to the first calculation result and the overall noise test parameter; Calculate the overall noise level of the modified SEA reference model through VAONE and obtain a second calculation result; When the error between the second calculation result and the overall noise test parameter meets the preset error requirement, it is confirmed that the correction of the SEA reference model is completed.

7. The acoustic package configuration method according to claim 1, characterized in that: The step of performing an overall noise level test on the SEA transplant model and obtaining a test result, and configuring an acoustic package for the object to be developed according to the test result, includes: Calculate the overall noise level of the SEA transplant model through VAONE and obtain a third calculation result; Acquiring a noise transmission path of the object to be developed, and configuring an acoustic package in the noise transmission path according to the third calculation result and a preset overall noise target value; Calculating the overall noise level of the SEA reference model after configuring the acoustic package through VAONE and obtaining a fourth calculation result; When the error between the fourth calculation result and the preset overall noise target value meets the preset optimization requirement, it is confirmed that the acoustic package configuration is completed.

8. A computer device comprising a memory, a processor, and computer-readable instructions stored in the memory and executable on the processor, characterized in that: When the processor executes the computer-readable instructions, the acoustic package configuration method according to any one of claims 1 to 7 is implemented.

9. A computer-readable storage medium storing computer-readable instructions, characterized in that: When the computer-readable instructions are executed by a processor, the acoustic package configuration method according to any one of claims 1 to 7 is implemented.

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