CN115659515A - Abnormal sound simulation automatic analysis method and system for automobile safety belt retractor - Google Patents
Abnormal sound simulation automatic analysis method and system for automobile safety belt retractor Download PDFInfo
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- CN115659515A CN115659515A CN202211373515.7A CN202211373515A CN115659515A CN 115659515 A CN115659515 A CN 115659515A CN 202211373515 A CN202211373515 A CN 202211373515A CN 115659515 A CN115659515 A CN 115659515A
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Abstract
The invention provides an abnormal sound simulation automatic analysis method and system for an automobile safety belt retractor, wherein a white automobile body and safety belt retractor abnormal sound finite element simulation analysis model is established; loading point and response point ID standardization naming; starting a preprocessing script, generating a load file for a calculation point, and using the load file for Nastran calculation; transmitting the load file to Nastran software for calculation and solving, and outputting a pch format file; operating a post-processing script to generate a vibration speed sensitivity analysis result of the safety belt retractor; carrying out abnormal sound risk evaluation; according to the method, the vibration speed sensitivity is subjected to analog simulation analysis to measure the possibility of abnormal sound generation, and a user can optimize a local reinforcing structure of a body-in-white or an internal structure of a retractor in a data stage according to an analysis result, so that the cost and the period cost for solving problems in the later period of a project are reduced; through the standardized processing of the modeling module, the automatic script is compiled for the loading and post-processing module, so that the period of simulation analysis is shortened, and the efficiency of scheme iterative optimization is greatly improved.
Description
Technical Field
The invention belongs to the technical field of automobile design and development, and particularly relates to an abnormal sound simulation automatic analysis method and system for an automobile safety belt retractor.
Background
With the development of the automobile industry, the level of intelligence of automobiles is higher and higher. At present, abnormal noise is an important factor influencing the NVH performance of the whole automobile, and from the quality problem information of J.D. POWER and IQS feedback, the first two complaints of the abnormal noise from customers are ranked among all complaints, and increasingly arouse the attention of automobile manufacturers. It is highly likely to cause product complaints because it can be directly perceived by the user. The abnormal sound of the safety belt retractor is a common problem in the whole vehicle, if the problem is found in the later stage of a project, the problem is limited by factors such as process, period and part boundary conditions, the problem solving process is time-consuming and labor-consuming, at present, analysis on the abnormal sound of the vehicle mainly focuses on interior trim parts such as an automobile instrument panel and a guard plate, simulation is carried out on relative displacement between interior trim analysis objects by adopting modes such as road excitation and the like so as to judge risks caused by the abnormal sound, research on movement between parts caused by excessive vibration of the safety belt retractor is less, and the abnormal sound simulation analysis automation method is not discussed in the current technical literature.
The abnormal sound of the safety belt retractor is a common problem in the whole vehicle, if the problem is found in the later stage of a project, the problem is limited by factors such as process, period, part boundary conditions and the like, and the problem solving process is time-consuming and labor-consuming. The reason that current motorcycle type coiler abnormal sound produced is because generally because road surface excitation makes the whole vibration speed of coiler too big, produces between its inside adjacent spare part and beats the noise.
Disclosure of Invention
In order to solve the problems, the invention provides an abnormal sound simulation automatic analysis method and system for an automobile safety belt retractor, vibration speed sensitivity simulation analysis is adopted to measure the possibility of abnormal sound generation, and a user can optimize a local body-in-white reinforcing structure or an internal structure of the retractor in a data stage according to an analysis result, so that the cost and the period cost for solving the problems in the later period of a project are reduced.
The invention is realized by the following technical scheme:
an abnormal sound simulation automatic analysis method for an automobile safety belt retractor comprises the following steps:
the method specifically comprises the following steps:
and 6, evaluating the abnormal sound risk.
Further, in the step 1,
introducing geometric data of an analysis model through Hypermesh software, and establishing a body-in-white + safety belt retractor simulation analysis model;
the body-in-white is modeled by adopting a finite element grid; the safety belt retractor model is simplified into the concentrated mass at the finite element grid and the mass center of the mounting support, and is fixed on a white vehicle body by adopting a rigid unit.
Further, in step 2,
the loading points are 4 shock absorber towers, and the response points are the central points of the safety belts and the mounting points of the safety belts and the vehicle body.
Further, in step 3,
the Load files comprise a Set file, a Subcase file and a Load file;
the Set file is used for defining an excitation point;
the Subcase file is used for defining speed sensitivity output under unit excitation work;
and the Load file is used for defining the Load file.
Further, in step 5, specifically, the following steps are included,
step 5.1, selecting a vibration velocity sensitivity analysis result storage path;
step 5.2, extracting the vibration speed result of the first response point from the result file to generate a curve;
step 5.3, obtaining the target values in the x direction, the y direction and the z direction corresponding to the response points, and generating a target value curve;
step 5.4, judging whether the analysis result has a point higher than the target value, if so, executing step 5.5; if there is no point in the analysis result that is higher than the target value, step 5.6 is performed;
step 5.5, identifying and marking the frequency and amplitude of the peak point, and determining a conclusion according to an analysis result curve, a target value curve and a result peak value to generate a vibration velocity sensitivity analysis result;
and 5.6, searching the node number of the next response point, stopping until the response point is displayed to be empty, and exiting the program.
Further, in step 6,
and judging the frequency and the amplitude exceeding the target value according to the analysis result, and providing an optimization scheme and carrying out iterative analysis.
An abnormal sound simulation automatic analysis system of an automobile safety belt retractor comprises:
the system comprises: the system comprises a simulation analysis model establishing module, a standardized naming module, a pre-processing script module, a calculation output module, a post-processing script module and risk evaluation;
the simulation analysis model establishing module is used for establishing a white vehicle body and safety belt retractor abnormal sound finite element simulation analysis model;
the standardized naming module is used for carrying out standardized naming on the ID of the loading point and the response point;
the preprocessing script module is used for starting a preprocessing script, generating a load file for a calculation point and calculating Nastran;
the calculation output module is used for transmitting the load file to Nastran software for calculation and solving, and outputting a pch format file;
the post-processing script module is used for running a post-processing script and generating a vibration speed sensitivity analysis result of the safety belt retractor;
and the risk evaluation module is used for carrying out abnormal sound risk evaluation.
An electronic device comprising a memory storing a computer program and a processor implementing the steps of the above method when executing the computer program.
A computer readable storage medium storing computer instructions which, when executed by a processor, implement the steps of the above-described method.
A vehicle, characterized by comprising: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor executing the program to implement the steps of the above method.
The invention has the beneficial effects
According to the method, the vibration speed sensitivity simulation analysis is adopted to measure the possibility of abnormal sound generation, and a user can optimize the local reinforcing structure of the body-in-white or the internal structure of the retractor in a data stage according to an analysis result, so that the cost and the period cost for solving the problem in the later stage of the project are reduced.
According to the invention, through the standardized processing of the modeling module, the automatic script is compiled for the loading and post-processing module, so that the period of simulation analysis is shortened, and the efficiency of iterative optimization of the scheme is greatly improved.
Drawings
FIG. 1 is an analytical flow chart according to the present invention;
FIG. 2 is a normalized naming of load and excitation points of the present invention;
FIG. 3 is a Set file according to the present invention;
FIG. 4 is a Subcase file of the present invention;
FIG. 5 is a Load file of the present invention;
FIG. 6 shows the results of the vibration velocity sensitivity analysis according to the present invention;
fig. 7 shows an internal communication structure of the present invention, in which 401 is a memory, 402 is a processor, and 403 is a communication interface.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
With reference to figures 1 to 7.
An abnormal sound simulation automatic analysis method for an automobile safety belt retractor comprises the following steps:
the method specifically comprises the following steps:
and 6, evaluating the abnormal sound risk.
In the step 1, the process is carried out,
introducing geometric data of an analysis model through Hypermesh software, and establishing a body-in-white + safety belt retractor simulation analysis model;
the body-in-white is modeled by adopting a finite element grid; the safety belt retractor model is simplified into the concentrated mass at the finite element grid and the mass center of the mounting support, and is fixed on a white vehicle body by adopting a rigid unit.
In the step 2, the process is carried out,
in order to realize the standardization of the loading module and the post-processing module, the ID of the loading point and the ID of the response point adopt standardized names, the loading point is 4 shock absorber tower seats, and the response point is the central point of a safety belt and the mounting point of the safety belt and a vehicle body. The naming mode is shown in figure 2:
wherein, the ID of the loading point generally adopts 3001-3004, and the response point adopts 8001-8006 (which can be increased or decreased according to the actual requirement);
in the step 3, the process is carried out,
the Load files comprise a Set file, a Subcase file and a Load file;
the Set file is used for defining an excitation point, as shown in fig. 3;
the Subcase file is used for defining speed sensitivity output under unit excitation work; as shown in fig. 4;
the Load file is used to define a payload file, as shown in fig. 5.
In step 5, the method specifically comprises the following steps,
step 5.1, selecting a storage path of the vibration velocity sensitivity analysis result;
step 5.2, extracting the vibration speed result of the first response point from the result file to generate a curve;
step 5.3, obtaining the target values in the x direction, the y direction and the z direction corresponding to the response points, and generating a target value curve;
step 5.4, judging whether the analysis result has a point higher than the target value, if so, executing step 5.5; if there is no point in the analysis above the target value, step 5.6 is executed;
step 5.5, identifying and marking the frequency and amplitude of the peak point, and determining a conclusion according to an analysis result curve, a target value curve and a result peak value to generate a vibration velocity sensitivity analysis result;
and 5.6, searching the node number of the next response point, stopping until the response point is displayed to be empty, and exiting the program.
In a step 6 of the method, the step of the method,
and judging the frequency and the amplitude exceeding the target value according to the analysis result, and providing an optimization scheme and carrying out iterative analysis.
The specific operation is that the finite element model of the body-in-white or the retractor in the step 1 is changed, the boundary conditions such as load file calculation and the like and the post-processing method are marked and modularized, and the optimized vibration velocity sensitivity analysis result can be directly called and generated.
An abnormal sound simulation automatic analysis system of an automobile safety belt retractor comprises:
the system comprises: the system comprises a simulation analysis model establishing module, a standardized naming module, a pre-processing script module, a calculation output module, a post-processing script module and risk evaluation;
the simulation analysis model establishing module is used for establishing a white vehicle body and safety belt retractor abnormal sound finite element simulation analysis model;
the standardized naming module is used for carrying out standardized naming on the ID of the loading point and the response point;
the system comprises a preprocessing script module, a load file module and a data processing module, wherein the preprocessing script module is used for starting a Python preprocessing script, generating a load file for a calculation point and calculating Nastran;
the calculation output module is used for transmitting the calculation head file, the model file and the load file to Nastran software (finite element solving software) for calculation and solution and outputting a pch format file;
the post-processing script module is used for running a post-processing script and generating a vibration speed sensitivity analysis result of the safety belt retractor;
and the risk evaluation module is used for carrying out abnormal sound risk evaluation.
The abnormal sound problem comprises information such as the position, phenomenon, working condition and perception degree of the abnormal sound.
The abnormal sound grading standard is shown in table 1, the subjective grading adopts a 10-point grading method, the value of the problem with the highest abnormal sound is 4 points because the functional and safety problems are not involved, and the subjective evaluation of 7 points or more shows that the abnormal sound level of the part or the assembly is acceptable.
| Score value | Severity of abnormal sound | Subjective evaluation feeling |
| 4 | Very loud abnormal sounds, which can be felt by all customers and cause extreme discomfort | All users complain or complain |
| 5 | Severe abnormal sound, which can be felt by all customers and causes discomfort | Easily cause |
| 6 | Slight abnormal sound, which can only be felt by the critical user | The critical customers complain about |
| 7 | Slight abnormal sound, which can be felt only by the scrutiny or the professional user listening with concentration | The user who is critical and who needs improvement may complain about |
| 8 | The abnormal sound can hardly be heard, and even a critical or professional user can hardly hear the abnormal sound | The critical user should not complain about |
| 9 | Hardly hear any sound | The critical users will not complain |
| 10 | Has no defects and is very excellent | Is very good |
TABLE 1 subjective Scoring rule for abnormal sounds in Assembly
An electronic device comprising a memory storing a computer program and a processor implementing the steps of the method when the processor executes the computer program.
A computer readable storage medium storing computer instructions which, when executed by a processor, implement the steps of the above-described method.
A vehicle, characterized by comprising: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor executing the program to implement the steps of the above method.
The vehicle further includes:
a communication interface 403 for communication between the memory 401 and the processor 402.
A memory 401 for storing computer programs executable on the processor 402.
If the memory 401, the processor 402 and the communication interface 403 are implemented independently, the communication interface 403, the memory 401 and the processor 402 may be connected to each other through a bus and perform communication with each other. The bus may be an Industry Standard Architecture (Industry Standard Architecture), abbreviated ISA bus, peripheral Component interconnect (PCI bus), extended Industry Standard Architecture (Extended Industry Standard Architecture), abbreviated EISA bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 7, but this is not intended to represent only one bus or type of bus.
Optionally, in a specific implementation, if the memory 401, the processor 402, and the communication interface 403 are integrated on a chip, the memory 401, the processor 402, and the communication interface 403 may complete mutual communication through an internal interface.
The method and the system for automatically analyzing the abnormal sound simulation of the automobile safety belt retractor are introduced in detail, the principle and the implementation mode of the method are explained, and the description of the embodiment is only used for helping to understand the method and the core idea of the method; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. An abnormal sound simulation automatic analysis method for an automobile safety belt retractor is characterized by comprising the following steps:
the method specifically comprises the following steps:
step 1, establishing a white vehicle body and safety belt retractor abnormal sound finite element simulation analysis model;
step 2, standardizing and naming ID of the loading point and the response point;
step 3, starting a pre-processing script, generating a load file for the calculation point, and using the load file for Nastran calculation;
step 4, transmitting the load file to Nastran software for calculation and solution, and outputting a pch format file;
step 5, running a post-processing script to generate a vibration speed sensitivity analysis result of the safety belt retractor;
and 6, evaluating the abnormal sound risk.
2. The analytical method of claim 1, wherein: in the step 1, the process is carried out,
introducing geometric data of an analysis model through Hypermesh software, and establishing a body-in-white + safety belt retractor simulation analysis model;
the body-in-white is modeled by adopting a finite element grid; the safety belt retractor model is simplified into the concentrated mass at the finite element grid and the mass center of the mounting support, and is fixed on a white vehicle body by adopting a rigid unit.
3. The analytical method of claim 2, wherein: in the step 2, the process is carried out,
the loading points are 4 shock absorber towers, and the response points are the central points of the safety belts and the mounting points of the safety belts and the vehicle body.
4. The analytical method of claim 3, wherein: in the step 3, the process is carried out,
the Load files comprise a Set file, a Subcase file and a Load file;
the Set file is used for defining an excitation point;
the Subcase file is used for defining speed sensitivity output under unit excitation work;
and the Load file is used for defining the Load file.
5. The analytical method of claim 4, wherein:
in step 5, the method specifically comprises the following steps,
step 5.1, selecting a vibration velocity sensitivity analysis result storage path;
step 5.2, extracting the vibration speed result of the first response point from the result file to generate a curve;
step 5.3, obtaining the target values in the x direction, the y direction and the z direction corresponding to the response points, and generating a target value curve;
step 5.4, judging whether the analysis result has a point higher than the target value, if so, executing step 5.5; if there is no point in the analysis result that is higher than the target value, step 5.6 is performed;
step 5.5, identifying and marking the frequency and amplitude of the peak point, and determining a conclusion according to an analysis result curve, a target value curve and a result peak value to generate a vibration velocity sensitivity analysis result;
and 5.6, searching the node number of the next response point, stopping until the response point is displayed to be empty, and exiting the program.
6. The analytical method of claim 5, wherein: in a step 6, the process is carried out,
and judging the frequency and the amplitude exceeding the target value according to the analysis result, and providing an optimization scheme and carrying out iterative analysis.
7. The utility model provides an automatic analytic system of car blet coiler abnormal sound emulation which characterized in that:
the system comprises: the system comprises a simulation analysis model establishing module, a standardized naming module, a pre-processing script module, a calculation output module, a post-processing script module and risk evaluation;
the simulation analysis model establishing module is used for establishing a white vehicle body and safety belt retractor abnormal sound finite element simulation analysis model;
the standardized naming module is used for carrying out standardized naming on the ID of the loading point and the response point;
the preprocessing script module is used for starting a preprocessing script, generating a load file for a calculation point and calculating Nastran;
the calculation output module is used for transmitting the load file to Nastran software for calculation and solving, and outputting a pch format file;
the post-processing script module is used for running a post-processing script and generating a vibration speed sensitivity analysis result of the safety belt retractor;
and the risk evaluation module is used for carrying out abnormal sound risk evaluation.
8. An electronic device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor realizes the steps of the method as claimed in claims 1 to 6 when executing the computer program.
9. A computer-readable storage medium storing computer instructions for implementing the steps of the method of claims 1 to 6 when executed by a processor.
10. A vehicle, characterized by comprising: memory, processor and computer program stored on the memory and executable on the processor, the processor executing the program to implement the steps of the method as claimed in claims 1 to 6.
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