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An Efficient Method for Prediction of the Flow-induced Vehicle Interior Noise

Journal of Physics: Conference Series 2020年第2期1650卷

作者： Yingjie Liu Wenbo Lu Qi Zhang Xing Wang Xiang Yin Hangsheng Hou Authors are with the China Faw Group Co. Ltd State Key Laboratory of Comprehensive Technology on Automobile Vibration and Noise & Safety control Changchun China Authors are with the Shanghai Hikey-Sheenray Information Technology Co. Ltd. Shanghai China. Author is with the School of automotive engineering Wuhan University of Technology Wuhan China

Wind noise is an important attribute for vehicle interior quietness. To improve the efficiency of wind noise simulation, a method of Stochastic Noise Generation and Radiation (SNGR) is used to rebuild the flow field based on steady simulation result. For wind noise simulation, the flow field result of transient simulation is only applied to low frequency, and the result of the SNGR method is applied to middle and high frequency. Finally, correcting the SNGR result by correction coefficient and combining the two results. The experiment and simulation results have good agreement. The results shows that the hybrid method for predicting the wind noise in vehicle can not only obtain good results, but also improve computational efficiency.

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Analysis and Life Span Prediction of Drum Brake Multi-physics Two-way Coupling

Analysis and Life Span Prediction of Drum Brake Multi-physic...

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第19届亚太汽车工程年会暨2017中国汽车工程学会年会

作者： Chen Jing Cao Zhenglin Zhang Qun Chen Ying Han Yepeng Liu Yanhe China FAW Group Corporation R&D Center State Key Laboratory of Comprehensive Technology on Automobile Vibration and Noise &Safety Control

Taking car drum brake as an object of study,we developed a type of multi-physics two-way coupling analysis method that was capable of controlling data exchange and mapping & interpolation function,and a simulation method on thennal fatigue life span analysis based on the classic Manson-Coffin *** applied this method to the bench test of drum brake hot crack,and then conducted a comparison between the brake drum thennal fatigue life span generated in the simulated prediction after analysis and that generated from the bench test *** comparison result shows;the brake life span prediction overall accuracy is above 90%,the developed brake multi-physics two-way coupling analysis & life span prediction method is more advanced with high precise analysis,and has the value of engineering application and promotion in improving the capability of brake design.

关键词： drum brake multi-physics two-way coupling manson-coffin thermal fatigue hot crack bench test

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Crash Energy-absorption Structure Desing Based on an Innovated Lightweight technology

Crash Energy-absorption Structure Desing Based on an Innovat...

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第19届亚太汽车工程年会暨2017中国汽车工程学会年会

作者： Gao Weizhao Li Yiwen Zhu Xuewu Yao Zhou Liu Ledan CHINA FAW Co. Ltd.R&D Center State Key Laboratory of Comprehensive Technology on Automobile Vibration and Noise & Safety Control

Since lightweight in vehicle design can largely reduce the energy consume and gas emission along with a comprehensive property promotion,expers have denoted great efforts on developing new lightweight ***,the exisisted researches indicate that the lightweight is always started from a macro view by material and structure *** extend the lightweight study to a micro view,an innovated lightweight technology based on the negative Poisson's ratio structure and space truss composite material is introduced in this paper to redesign a crash box and bumper assembly under the crashworthiness ***,systematic analysis of the component and assembly crashworthiness property are earned out,and the results show that the potential capability of this new technology in crashworthiness based structure lightweight desgin is enormous.

关键词： negative poisson's ratio composite material lightweight crashworthiness

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Control and Analysis of Gear Whine Noise in Automotive Transmission Oil Pump

Control and Analysis of Gear Whine Noise in Automotive Trans...

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2015中国汽车工程学会年会

作者： Wenbo Niu Guiping Yue Yingjie Liu Jianjiao Deng Jinliang Bi Fengjun Zhao State Key Laboratory of Comprehensive Technology on Automobile Vibration and Noise and Safety Control Chine FAW R&D Center

In order to reduce the gear whine noise of a DCT oil pump,a model is established based on loaded tooth contact analysis method,and the gear transmission error and acceleration of the DCT housing are calculated in different *** influences of gear macro-geometry and assembled errors on housing acceleration are researched,and the primary factors influencing gear whine noise have been *** gear design is refined,and the oil pump gear noise is dissipated in vehicle NVH test.

关键词： transmission gear whine noise NVH

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Research on Nonlinear Dynamics Simulation of Heavy Truck in Time Domain

Research on Nonlinear Dynamics Simulation of Heavy Truck in ...

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2015中国汽车工程学会年会

作者： Zhenglin Cao Chao Han Ye Lin He Li Ming Gao China FAW Co. Ltd R&D CenterState Key Laboratory of Comprehensive Technology on Automobile Vibration and Noise & Safety Control

Dynamic simulation of vehicle model in time domain with nonlinearity draws more and more attention in the *** difficulty often results from *** Abaqus Standard/Explicit,nonlinear models of leaf spring,tire and rubber bushing were set up accurately,and a nonlinear dynamic simulation of medium and heavy truck was carried out The simulation results agreed well with road simulator test *** method provides a good base of nonlinear dynamics simulation with proving ground durability load data as input in future study.

关键词： medium and heavy truck nonlinear dynamics rime domain simulation

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Simulation and Validation of Engine Valvetrains System Dynamics

Simulation and Validation of Engine Valvetrains System Dynam...

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2014中国汽车工程学会年会

作者： Niu Wenbo Tang Lechao Jiang Wenhu Li Tiancheng Chine FAW Group Corporation R&D Center State Key Laboratory of Comprehensive Technology on Automobile Vibration and Noise & Safety Control Chine FAW Group Corporation R&D Center

ISBN: (纸本)9783662450420

The dynamic behavior of the valvetrains for a gasoline engine is simulated by using a multi- valvetrain dynamic model,of which the stiff parameters are caculated by finite element ***,the simulation results of camshaft torques and valve forces are validated by experiments,and the calculated data are consistent with the test *** on the correct model,the sensitivities of dynamic loads influencing NVH of the engine directly are analysed,and the primary influencing factors of the fluctuation of camshaft force,torque and spring force have been found,and further dynamic force optimization direction for NVH performance of valve train have been pointed out.

关键词： valve trains dynamic analysis dynamic force NVH

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Multi-objective optimization and multi-attribute decision of mini-van chassis

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FISITA 2012 World Automotive Congress

作者： Jin, Xulong Qin, Min Jiang, Yongfeng Wang, Wenbin Cheng, Chao State Key Lab. of Comprehensive Technology on Automobile Vibration and Noise and Safety Control FAW R and D Center Changchun China

ISBN: (纸本)9783642337949

Chassis developing is very important in vehicle performance. There are many chassis characteristic targets which may interfere with each other in most case. This efficiency function is difficult to confirm before optimization. We study the mini-van, build the multi-body suspension dynamic model, set up an optimization platform using Isight software by integrating ADAMS and MATLAB. Chassis design parameters of Multi-body Pareto optimization solutions were gotten by using multi-body genetic algorithm. The final chassis design parameters were confirmed by using multi-attribute decision. © 2013 Springer-Verlag.

关键词： Multiobjective optimization

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A study on pitching characteristics of the passenger car in braking process

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FISITA 2012 World Automotive Congress

作者： Wang, Xuanfeng Shi, Guang Jin, Lingge Ying, Guozeng Yang, Hongwei State Key Lab. of Comprehensive Technology on Automobile Vibration and Noise and Safety Control FAW R and D Center Changchun China

ISBN: (纸本)9783642337949

The passenger car will take on a strong pitching movement in the process of emergent braking, which makes a great impact on the ride comfort. The paper aims at resolving the practical problems of vehicle pitching. First, the variation characteristics of swing arm instant center of the front and rear suspensions are analyzed, and the suspensions adapted in the passenger car are under the combined effect of braking force and vertical force. Secondly, the calculation model of pitching characteristics and braking deceleration is established. Thirdly, test data of suspension K&C characteristic are analyzed so as to get the vertical and longitudinal displacement variation characteristics of the wheel center. Based on the calculation model of pitching characteristics and the tests of brake pitching characteristic, two conclusions are obtained. One is putting forward two evaluation indexes of vehicle pitching characteristics, the relationships of pitch angle versus braking deceleration and changing rate of longitudinal deceleration versus braking deceleration are used to comprehensively evaluate the pitching characteristics of vehicle;the other is taking advantage of four process parameters to control the pitching characteristics of vehicle in braking process, and the four parameters are respectively. The anti-dive control of front and rear suspensions, the variation of vehicle wheelbase, the displacement of the centre of gravity in vertical direction. According to the aforementioned study results, the ideal brake pitching characteristics can be reached through rationally matching the longitudinal inclination balance characteristics of front and rear suspensions. © 2013 Springer-Verlag.

关键词： Brakes

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A precise positioning system based on DGPS and GIS for automatic driving vehicle

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9th International Symposium on Linear Drives for Industry Applications, LDIA 2013

作者： Zhang, Jian Guo Li, Hong Jian Liu, Bin State Key Laboratory of Comprehensive Technology on Automobile Vibration Noise and Safety Control Changchun 130011 China China FAW Group Corporation R and D Center Changchun 130011 China

ISBN: (纸本)9783037858639

A precise positioning technology was introduced in this paper and A precise positioning system has been built. The DGPS technology was introduced to acquire accurate data of the roads and traffic facilities in the system and a data-base has been built. The data-base was applied to GIS platform and a centimeter-level accurate road model was established. In addition, DGPS technology was adopted to achieve centimeter-level position. The position data coupling with accurate road model and the locating point would be indicated instantaneously. The distance between the locating point and the road boundaries, traffic signs lines, traffic lights, etc. could be indicated in the map and also the speed, acceleration, etc. of the locating point. This study provided positioning and navigation technology for the automatic driving technology of the intelligent vehicle. © (2013) Trans Tech Publications, Switzerland.

关键词： Traffic signs

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Apply near-field acoustic holography to identify the noise source of pass-by vehicles

Apply near-field acoustic holography to identify the noise s...

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FISITA 2012 World Automotive Congress

作者： Li, Lingzhi Li, Jun Lu, Bingwu Liu, Yinjie State Key Lab. of Comprehensive Technology on Automobile Vibration and Noise and Safety Control Mainland China China FAW Co. Ltd. R and D Center Mainland China

ISBN: (纸本)9783642338311

When using Near-field Acoustic Holography (NAH) to identify the noise source of a pass-by vehicle in a test-room, the hologram aperture must be at least as large as the source aperture, requiring a large element array. The reconstruction of NAH is an ill-posed inversion problem that requires a regularization procedure. The commonly used Tikhonov regularization procedures require a significant amount of computing time for a large hologram array. In this work, a fast and robust regularization procedure is developed for NAH on the basis of a statistical energy constraint equation (SECE) that links the hologram and the reconstruction sound pressures. This procedure is able to identify the optimal cutoff wave number for an existing exponential filter in a single measurement event without a prior knowledge of the noise. It is tested via numerical simulation for an exponential filter function in an NAH at various sound frequencies, hologram distances and signal-to-noise ratios (SNR). The SECE procedure is applied to identify the noise source on the right side of a vehicle in a semi-anechoic chamber. The results are compared with those obtained with the Far-field filter, generalized cross validation (GCV), L-curve and the Morozov discrepancy principle (MDP) methods. © 2013 Springer-Verlag.

关键词： Holograms

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