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Shock and Vibration
Volume 18 (2011), Issue 1-2, Pages 289-298

Mode Calculation and Testing of a Car Body in White

Ying Yang,1 Guangyao Zhao,1 Dongbo Ma,2 and Xiaobin Xu1

1School of Mechanical Engineering and Automation, Northeastern University, Shenyang, 110819, China
2Shenyang Aviation Vocational Technical College, Shenyang, 110043, China

Received 12 February 2010; Revised 23 June 2010

Copyright © 2011 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The dynamic parameters of a car body in white (BIW) are important during a new car developing. Based on the finite element method, the model of a BIW is developed in which the welding points are treated specially as a new element type and the vibration modes of it are calculated. In modal testing, a fixed sine-sweeping exciter is used to conduct a single-point input force for the structure, whereas the output responses are picked up at different points to identify modes. The obtained modes are coincided both with the FE results and the practical testing.