吉林大学学报(工学版) ›› 2009, Vol. 39 ›› Issue (增刊2): 269-0273.

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Calculation method of auto body complex sub-structure modal density

SONG Ji-qiang1,WANG Deng-feng1,MA Tian-fei1,LU Bing-wu2, YA Hao2   

  1. 1.State Key Laborotory of Automobile Dynamic Simulation, Jilin University, Changchun 130022,China|2.FAW Group Technology Center, Changchun 130011,China
  • Received:2008-02-25 Online:2009-09-30 Published:2009-09-30

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Abstract:

In order to determine the modal density of complex sub-structure such as auto body, it was studied from theory calculation, test measurement, numerical analysis and virtual test aspects. The influence of the complex sub-structure modal density to vehicle interior noise obtained by method of theory calculation and virtual test was compared and analysed, according to the established cab Statistical Energy Analysis(SEA) model. The results show that the virtual test method used to determine the sub-structure modal density can improve the prediction accuracy of the SEA model.

Key words: vehicle engineering, complex sub-structure, modal density, virtual test, statistics energy analysis, finite element method

CLC Number: 

  • U461
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