【摘 要】
：
Due to the fact that vehicle suspension system is complicated,how to identify the structure-borne path of road noise efficiently and accurately is the key point of road noise diagnosis.In this researc
【机 构】
：
State Key Laboratory of Vehicle NVH and Safety Technology;Changan Auto Global R&D Center,Changan Aut
论文部分内容阅读
Due to the fact that vehicle suspension system is complicated,how to identify the structure-borne path of road noise efficiently and accurately is the key point of road noise diagnosis.In this research,a transfer path diagnosis approach for road noise diagnosis is proposed.In terms of methodology,the proposed method is based on multiple coherence method and it also needs to take into account the mechanical transfer paths of road noise.Therefore,the numerical implementation of multiple coherence method is presented first and then the classification of mechanical transfer paths of road noise.As for the practical application,first of all,the presented approach is used to investigate the transfer paths of a 79Hz road induced drumming problem of a vehicle.And then mechanism for above mentioned problem is predicted combining the modal results of relevant components.Furthermore,the predicted result is validated by adding a tuned 78Hz damper to the lower control arm on both side of rear suspension.The experimental result indicates that the peak value at 79Hz corresponding to road induced drumming noise reduces by 10 dB(A),which proves the correctness of the inference for drumming noise and further demonstrates the validity of theproposed diagnosis approach.
其他文献
目前发动机NCH性能要求不断提高，部分发动机零部件开始应用新的静音材料来降低零件本身对发动机的噪声贡献。新材料的应用在解决噪声问题的同时也带来了新的可靠性问题，本文对某汽油发动机油底壳应用静音材料导致的紧固螺栓力矩衰减问题进行分析，针对力矩衰减的原因实施优化方案，改善紧固螺栓力矩衰减情况。
Transmission is one of the core assembly units of automobile,its performance has a decisive effect on the overall performance of automobile.And gear accuracy has the biggest influence on the performan
Diesel engine cylinders main bearing cover is tightened by torque Angle method,the bolt is subjected to high preload,and the crankcase wall is thin,which leads to deformation and displacement of the c
This paper is written by the author on the basis of a thorough understanding of the Measurement Systems Analysis reference manual and summarizing its successful experience in the production practice o
To improve the air quality in an automotive cab,after analyzing each impact from materials and production process of automotive sealing strips,we confirm the harmful ingredients in each additive and c
Based on the stiffness results of the tensile shear joint of structural adhesive,a reasonable modeling method of structural adhesive was obtained.A finite element(FE)model of the thin peelingspecimen
Based on the vibration problem of Some users light truck door frame,road load spectrum in similar pavement condition is obtained and extracted as the target signals.Including the doors,the multi-body
Tire is one of the main excitation sources of automobile vibration and noise,and it is the main factor of road noise and other abnormal noises in vehicle.In this paper,the road noise caused by the tir
Micro-perforated panel(MPP)structure has been widely used for various noise controls and its acoustic performance prediction has received more and more attention.The acoustic performance of simple MPP
As an important component of automobile,rolling bearing has a great impact on the safety of vehicle and occupants.At present,most of the literatures have studied the damaged bearing on the bench,and t