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Study on Simulation of Vehicle Ride Comfort Based on Pseudo Excitation Method

Author: LinMin
Tutor: ZhangXiangWei
School: Guangdong University of Technology
Course: Vehicle Engineering
Keywords: Vehicle ride comfort Simulation Pseudo excitation method Numerical model Finite element method
CLC: U461.4
Type: PhD thesis
Year: 2011
Downloads: 188
Quote: 0
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Abstract


Automobile ride is reflected car ride comfort performance indicators. Currently evaluating vehicle ride comfort prototype testing and numerical simulation are two ways. The kind of car test cycle, human and financial resources into large, no longer suited to the characteristics of Hyundai Motor Quickly update; numerical simulation as an adjunct or even the main method increasingly is very important. Numerical simulation method and prototype testing method has the following advantages: independent of the test conditions, restrictions, to avoid the interference of some random factors, comparable; Second, the existing car performance evaluation, but also for new products the ride comfort forecast. This will be able to know in advance with the ride Problems and resolved in a timely manner, can optimize the match between parameters to improve the ride comfort index, shorten the design period, reduce production cost, be able to predict the various components early in the design cars with ride. Automobile ride Modeling and Simulation at home and abroad have carried out a lot of research and its application, until today, is the research and exploration of the automotive world an important research direction. Collate and summarize the relevant research methods based on the combination of the National Natural Science Foundation of China (10272033) \research. The specific work of this article is: from the perspective of research and development and engineering applicable Summary summarizes the basic theory of stationary random vibration virtual excitation method, given a more rigorous derivation and use of pseudo excitation method of theoretical analysis of vehicle ride comfort. Secondly, the application of stationary random vibration pseudo excitation method, the cars ride simulation analysis to verify the pseudo excitation method for solving efficiency. Correctness of the results of the analysis with the Fourier method of a comparative demonstration method, at the same time, through the comparison of the computational efficiency, verified in this paper is more efficient. Furthermore, the method of thinking and multi-body dynamics of the finite element method, a mathematical model of vehicle vibration structure, assembled total displacement vector, mass matrix, stiffness matrix and damping matrix. Established a mathematical model of the car Structural System to verify the effectiveness of the method. Construct the convolution functional, of a structural system to prove the convolution functional equivalent of zero and the system vibration balance equation becomes divided into. Variational theory, a time-domain numerical methods based Universal gradually recurrence formula, the application of recursive formula gradually, by the stability analysis and calculation examples to verify the correctness and accuracy of the time-domain numerical methods; nine degrees of freedom cars structure system vibration model, the application of the new unit types at the same time, to further improve the car Structural System mathematical modeling method. Finally, the automobile real vehicle laboratories to carry out a smooth and non-smooth road on an experimental basis, the joint pseudo excitation method, modeling method and numerical methods, the ride comfort of passenger cars, incentives and non-stationary random road stationary random excitation the road to a more complete simulation analysis to verify the effectiveness and feasibility of the pseudo excitation method on the pavement analysis and automobile ride forecast.

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CLC: > Transportation > Road transport > Automotive Engineering > Car theory > Car ride and comfort
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