Title: Acoustic optimisation design for suspension characteristics based on the method of dynamic subsystem modification

Authors: Weiping Ding, Hongliang Li, Yanmei Liu, Mingliang Yang

Addresses: Institute of Automotive Engineering, School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, PR China. ' China Automotive Technology and Research Centre, Tianjin, 300162, PR China. ' China Automotive Technology and Research Centre, Tianjin, 300162, PR China. ' Institute of Automotive Engineering, School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, PR China

Abstract: Based on the finite element technique on the structure-acoustic coupling analysis, a dynamic subsystem modification method for the acoustic-vibration characteristic of an elastic thin-walled cavity is introduced in this paper. It is directly applied to the dynamic modification of an automobile|s passenger compartment and then supports the Noise, Vibration and Harshness (NVH) performance analysis on the suspension system. The design objective is minimising the sound pressure level of the interior noise of the passenger compartment and the design variables are the stiffness and the damping of suspension system. Finally, the effect of the optimisation design is validated through a calculating example.

Keywords: coupled structure-acoustic analysis; dynamic subsystem modification; suspension characteristics; acoustic optimisation design; finite element method; FEM; acoustic vibration; elastic thin-walled cavities; passenger compartment; vehicle suspension; vehicle noise; vehicle vibration; harshness; NVH performance; interior noise; stiffness; damping; automotive supensions.

DOI: 10.1504/IJVNV.2008.021896

International Journal of Vehicle Noise and Vibration, 2008 Vol.4 No.3, pp.220 - 234

Available online: 08 Dec 2008 *

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