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Optimization Design for Car-body Structure Based on the Frequency Response Sensitivity Analysis

ZHANG Meng;CHEN Jian;CHEN Yong-gan

2011, 31 (6): 135-138. DOI: 10.3969/j.issn.1006-1355-2011.06.030

Abstract （1536）

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Aiming at the problem of car-body optimization, the frequency response sensitivity analysis is used to reduce the response displacement of the car-body structure. Based on the finite element model of the car-body，the frequency response is calculated，and the displacement response curve of driver’s seat bracket is obtained，from which the vibration peak for a given frequency is found. To reduce the vibration peak, an optimal design based on the frequency response sensitivity analysis is carried out by selecting the appropriate design parameters. After the optimization，the response displacement?at key frequencies of the car is obviously reduced，and the riding comfort of the car is improved.

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Study on the Influence of Rubber Block Materials on NVH Performance of Vehicle Door

YUE Yang;LIU Qiang;MA Fang-wu;XIEYu;ZHANG Meng;LIU Fang;ZHAO Fu-quan

2011, 31 (5): 66-70. DOI: 10.3969/j.issn.1006-1355-2011.05.016

Abstract （2166）

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A model for NVH performance simulation for vehicle’s door subsystem is established based on FEM (Finite Element Method). A set of material test methods is developed to acquire the mechanical property of vibration isolating rubber block in complex technological conditions. Parameters of different materials are incorporated into the simulation model. By comparison of the results, the influence of different materials of the vibration isolating rubber blocks on the NVH performance of vehicle’s door subsystem can be found. This work may provide with guidance for selection of the materials of vibration isolating rubber blocks and for improvement of material proparation.