CN113127979A - NVH analysis method for vehicle-mounted jitter - Google Patents
NVH analysis method for vehicle-mounted jitter Download PDFInfo
- Publication number
- CN113127979A CN113127979A CN202110469118.9A CN202110469118A CN113127979A CN 113127979 A CN113127979 A CN 113127979A CN 202110469118 A CN202110469118 A CN 202110469118A CN 113127979 A CN113127979 A CN 113127979A
- Authority
- CN
- China
- Prior art keywords
- vehicle
- new energy
- peak value
- curve
- analysis method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004458 analytical method Methods 0.000 title claims abstract description 22
- 230000004044 response Effects 0.000 claims abstract description 28
- 230000005540 biological transmission Effects 0.000 claims abstract description 13
- 238000004364 calculation method Methods 0.000 claims abstract description 7
- 238000012795 verification Methods 0.000 claims abstract description 4
- 239000000725 suspension Substances 0.000 claims description 5
- 238000013016 damping Methods 0.000 claims description 3
- 230000005284 excitation Effects 0.000 claims description 3
- 238000004613 tight binding model Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 5
- 238000002360 preparation method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/15—Vehicle, aircraft or watercraft design
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/02—Reliability analysis or reliability optimisation; Failure analysis, e.g. worst case scenario performance, failure mode and effects analysis [FMEA]
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/10—Noise analysis or noise optimisation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
Abstract
The invention discloses an NVH analysis method of vehicle shaking, which comprises the steps of constructing a vehicle model of a new energy vehicle, and grouping and meshing an assembly model; acquiring calculation conditions, boundary conditions, parameters and responses; acquiring a response point of a whole vehicle model of the new energy vehicle; obtaining a vibration curve and a frequency curve of the response point, and extracting a peak value in the vibration curve and a frequency corresponding to the peak value; under the frequency corresponding to the peak value and the peak value, adjusting the equivalent included angle of a transmission shaft of the new energy automobile to be 2-5 degrees, and obtaining a fluctuation curve of the torque of the motor output end of the new energy automobile; verification was performed using the fluctuation curve. Through the scheme, the method has the advantages of simple logic, reliable preparation and the like, and has high practical value and popularization value in the technical field of NVH analysis of the whole automobile.
Description
Technical Field
The invention relates to the technical field of NVH analysis of a whole automobile, in particular to a NVH analysis method for vehicle vibration.
Background
NVH (Noise, vision, Harshness) is a comprehensive problem in measuring the quality of automobile manufacture, and it gives the automobile user the most immediate experience. Statistics show that 1/3 fault problem of the whole automobile is related to NVH problem of the automobile, and about 20% of research and development cost of each large automobile enterprise is spent on solving the NVH problem of the automobile. The defects and shortcomings of the prior art are as follows: the problem of shaking of the whole vehicle by new energy is solved by the prior art and is mainly optimized through control means such as testing and process control, the process is relatively long in time consumption, certain test cost is needed, and shaking results often cannot meet requirements.
The reason for the generation of jitter in the prior art is as follows: the whole vehicle runs on a cement road surface of 40-50KM/h, and the shaking of the whole vehicle, particularly the shaking of seats, is very obvious and is unacceptable; the vibration of the whole vehicle caused by the motor can be caused, and the factors such as overlarge equivalent included angle of a transmission shaft, fluctuation of the rotating speed of the transmission shaft, modal coupling resonance of the whole vehicle and the like caused by unreasonable suspension rigidity matching can also be caused.
Therefore, an NVH analysis method for vehicle vibration and harshness (NVH) of the whole vehicle is urgently needed to be found out according to a transmission path of the vibration and by combining the NVH problem of the whole vehicle vibration and harshness.
Disclosure of Invention
Aiming at the problems, the invention aims to provide an NVH analysis method for vehicle vibration, and the technical scheme adopted by the invention is as follows:
a NVH analysis method for vehicle shaking comprises the following steps:
constructing a whole vehicle model of the new energy vehicle, and grouping and meshing the assembly models;
acquiring calculation conditions, boundary conditions, parameters and responses;
acquiring a response point of a whole vehicle model of the new energy vehicle;
obtaining a vibration curve and a frequency curve of the response point, and extracting a peak value in the vibration curve and a frequency corresponding to the peak value;
under the frequency corresponding to the peak value and the peak value, adjusting the equivalent included angle of a transmission shaft of the new energy automobile to be 2-5 degrees, and obtaining a fluctuation curve of the torque of the motor output end of the new energy automobile; verification was performed using the fluctuation curve.
Further, the parameters and responses include system mode, system damping, and excitation torque.
Further, the assembly model group includes a TB model, a motor model, and a suspension model.
Preferably, the response points include a steering wheel response point, a seat response point, and an accelerator pedal response point.
Compared with the prior art, the invention has the following beneficial effects:
the NVH analysis method and the NVH analysis idea for optimizing the vehicle vibration are found from the transmission path of the vehicle vibration, and the method has positive effects on the NVH performance and the strength durability of the vehicle. The analysis method is efficient in solving the real vehicle problem, short in period, strong in pertinence and obvious in effect, and can fundamentally solve the problem. In conclusion, the method has the advantages of simple logic, reliable preparation and the like, and has high practical value and popularization value in the technical field of NVH analysis of the whole automobile.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope of protection, and it is obvious for those skilled in the art that other related drawings can be obtained according to these drawings without inventive efforts.
FIG. 1 is a logic flow diagram of the present invention.
FIG. 2 is a diagram of a new energy vehicle model according to the present invention.
Fig. 3 is a boundary condition diagram of the new energy vehicle of the invention.
Fig. 4 is a response point distribution diagram of the new energy vehicle.
Fig. 5 is a response point analysis diagram of the new energy vehicle according to the invention.
Fig. 6 is a torque ripple diagram of the motor of the present invention.
FIG. 7 is an analytical comparison of the present invention.
Detailed Description
To further clarify the objects, technical solutions and advantages of the present application, the present invention will be further described with reference to the accompanying drawings and examples, and embodiments of the present invention include, but are not limited to, the following examples. 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 application.
Examples
As shown in fig. 1 to 7, the embodiment provides an NVH analysis method of vehicle shaking, a new energy vehicle runs on a cement road surface of 40-50KM/h, and vehicle shaking, especially seat shaking, is very obvious and unacceptable; the vibration of the whole vehicle caused by the motor can be caused, and the factors such as overlarge equivalent included angle of a transmission shaft, fluctuation of the rotating speed of the transmission shaft, modal coupling resonance of the whole vehicle and the like caused by unreasonable suspension rigidity matching can also be caused.
The analysis method of this example is as follows:
the first step is as follows: TB, motor, suspension and other assembly models are grouped and divided into grids, and the grids comprise a cab, a frame, a rear axle, a motor, a transmission shaft, a finished automobile counterweight and the like.
The second step is that: and applying calculation conditions, boundary conditions, parameters and responses and the like, wherein the parameters and the responses comprise system modal solution setting, system damping and excitation torque setting.
The third step: and setting the response points of the whole vehicle, such as setting the response points of a steering wheel, a seat, an accelerator pedal and the like, and then carrying out calculation and analysis on the noise and the vibration of the whole vehicle.
The fourth step: extracting and analyzing peak values and corresponding frequencies according to the calculation result of the whole vehicle, and simultaneously considering the frequency of practical engineering problems and the like; meanwhile, the equivalent included angle of the transmission shaft is optimized within the range of 2-5 degrees, and the torque of the output end of the motor is optimized according to the following fluctuation curve.
The fifth step: and performing secondary design development on the system according to the vibration or noise calculation result, performing real vehicle verification to obtain an optimal engineering solution, wherein the maximum peak value of the seat response acceleration is respectively reduced to 437mm/s ^2@11Hz and 246mm/s ^2@11Hz from 613mm/s ^2@11Hz, and the optimization effect is obvious. The test result of the vehicle jitter response point is expressed as follows:
in the embodiment, the torque of the output end of the motor, the equivalent included angle of the transmission shaft and the like are optimized, the maximum peak value of the seat response acceleration is respectively reduced to 437mm/s ^2@11Hz and 246mm/s ^2@11Hz from 613mm/s ^2@11Hz, the reduction range is large, the torque fluctuation of the output end of the motor is calibrated and the equivalent included angle of the transmission shaft is reduced by 2 degrees according to the analysis result, and the like. The method and the thought provide reference for solving the similar problems, are applied to the actual engineering with similar vehicle types in a large number, and solve a large number of actual engineering problems.
The embodiments are only preferred embodiments of the present invention, and do not limit the scope of the present invention, but all the modifications made by the principles of the present invention and the non-inventive efforts based on the principles shall fall within the scope of the present invention.
Claims (4)
1. A NVH analysis method for vehicle shaking is characterized by comprising the following steps:
constructing a whole vehicle model of the new energy vehicle, and grouping and meshing the assembly models;
acquiring calculation conditions, boundary conditions, parameters and responses;
acquiring a response point of a whole vehicle model of the new energy vehicle;
obtaining a vibration curve and a frequency curve of the response point, and extracting a peak value in the vibration curve and a frequency corresponding to the peak value;
under the frequency corresponding to the peak value and the peak value, adjusting the equivalent included angle of a transmission shaft of the new energy automobile to be 2-5 degrees, and obtaining a fluctuation curve of the torque of the motor output end of the new energy automobile; verification was performed using the fluctuation curve.
2. The NVH analysis method of vehicle completion jitter of claim 1, wherein the parameters and responses include system mode, system damping, and excitation torque.
3. An NVH analysis method of vehicle shaking according to claim 1, wherein the set of assembly models comprises a TB model, a motor model and a suspension model.
4. An NVH analysis method of vehicle shake according to claim 2 or claim 3 wherein the response points include a steering wheel response point, a seat response point and an accelerator pedal response point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110469118.9A CN113127979A (en) | 2021-04-28 | 2021-04-28 | NVH analysis method for vehicle-mounted jitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110469118.9A CN113127979A (en) | 2021-04-28 | 2021-04-28 | NVH analysis method for vehicle-mounted jitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113127979A true CN113127979A (en) | 2021-07-16 |
Family
ID=76780577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110469118.9A Pending CN113127979A (en) | 2021-04-28 | 2021-04-28 | NVH analysis method for vehicle-mounted jitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113127979A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113722840A (en) * | 2021-11-03 | 2021-11-30 | 江铃汽车股份有限公司 | Predictive analysis method for transverse jitter in acceleration process of new energy vehicle |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050189735A1 (en) * | 2002-09-24 | 2005-09-01 | Jurgen Berghus | Arrangement for vibration damping in a vehicle |
| CN106595849A (en) * | 2016-12-13 | 2017-04-26 | 江铃汽车股份有限公司 | Method and device for testing shake of whole automobile during urgent acceleration of automobile |
-
2021
- 2021-04-28 CN CN202110469118.9A patent/CN113127979A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050189735A1 (en) * | 2002-09-24 | 2005-09-01 | Jurgen Berghus | Arrangement for vibration damping in a vehicle |
| CN106595849A (en) * | 2016-12-13 | 2017-04-26 | 江铃汽车股份有限公司 | Method and device for testing shake of whole automobile during urgent acceleration of automobile |
Non-Patent Citations (5)
| Title |
|---|
| 付朋磊: "汽车传动轴振动分析、优化及仿真系统开发", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
| 夏元烽等: "后驱车传动系统扭转与弯曲振动的NVH性能", 《噪声与振动控制》 * |
| 谢珍兰: "由传动轴引起的整车振动研究与解决", 《汽车零部件》 * |
| 高梦熊: "《地下矿用汽车》", 北京：机械工业出版社 * |
| 黎仕增,等: "基于ADAMS振动仿真的传动系统振动问题整改", 《故障诊断与维修》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113722840A (en) * | 2021-11-03 | 2021-11-30 | 江铃汽车股份有限公司 | Predictive analysis method for transverse jitter in acceleration process of new energy vehicle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112597595B (en) | Method for diagnosing and optimizing structure noise in automobile | |
| CN112115556B (en) | In-vehicle vibration simulation analysis method based on finished vehicle start-stop working condition and storage medium | |
| CN111310380B (en) | Design and development method for suspension rubber bushing structure of electric vehicle power assembly | |
| CN106066921A (en) | A kind of CAE simulated prediction method of car load road vibration noise | |
| CN113127979A (en) | NVH analysis method for vehicle-mounted jitter | |
| CN108595881A (en) | The shimmy optimization method of steering wheel under a kind of high-speed working condition | |
| CN103575552A (en) | Method for debugging automobile powertrain suspension system | |
| CN111797549A (en) | NVH analysis method based on super-element and finite element mixed model | |
| CN113239458B (en) | Whole vehicle road noise simulation benchmarking method based on virtual road surface | |
| CN108801451B (en) | method for checking vibration of waist of vehicle seat | |
| CN102221402B (en) | Design method for rear drive axle of micro-surface automobile with low noise | |
| Flanigan et al. | Application of acoustic modeling methods for vehicle boom analysis | |
| CN109033594B (en) | Analysis method for optimizing vibration quantity of middle support of transmission shaft during starting of automobile | |
| CN111506982B (en) | Motor noise optimization method | |
| CN112597676A (en) | Automobile suspension vibration source sensitivity identification method and device | |
| CN113158322A (en) | Rim impact analysis method and device and readable storage medium | |
| CN113806977B (en) | Noise vibration analysis method and system for automobile cooling fan | |
| CN114818110A (en) | Front suspension flutter optimization method, control method and storage medium | |
| CN114139271A (en) | Method and device for determining reliability of gearbox shell | |
| CN114112441A (en) | Jitter debugging method for idle charging condition of hybrid vehicle | |
| CN111400821B (en) | Length or width adjustable automobile frame connection point determination method, non-load bearing type automobile frame and automobile | |
| CN111400817B (en) | Method for determining automobile frame connection point with modular structure, non-bearing automobile frame and automobile | |
| CN117408092B (en) | Robustness optimization method and system for commercial vehicle power assembly suspension system | |
| CN111709160A (en) | Method and system for analyzing and optimizing driving dynamic performance based on truck chassis | |
| Yang et al. | On the use of Multi-disciplinary optimisation methods for road vehicle passive suspension design |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210716 |