吉林大学学报(工学版) ›› 2017, Vol. 47 ›› Issue (5): 1379-1386.doi: 10.13229/j.cnki.jdxbgxb201705008

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BIW dynamic characteristics based on spot-welding parameter identification

YANG Yue-dong1, 2, CHEN Ji-qing1, 2, LAN Feng-chong1, 2, ZHOU Yun-jiao1, 2   

  1. 1.School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640,China;
    2.Guangdong Province Key Laboratory of Automotive Engineering, Guangzhou 510640,China
  • Received:2016-05-12 Online:2017-09-20 Published:2017-09-20

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Abstract:

The relationship between the modifications of spot-welding mass matrices or rigidity matrices and Body in White (BIW) structural dynamic characteristics is investigated. First, the spot-welding parameters of shell structures in BIW are identified in order to describe the actual structural frequencies and vibration mode. Then, the method of Elastic-Plastic Beam with Parameter Identification (EPBPI) is employed to simulate spot-welding. Finally, the EPBPI method is compared with the universal method of elastic-plastic beam spot-welding in dynamic characteristic analysis, and it is applied to simulate of the dynamic characteristics of a real BIW to further validate the simulation accuracy. Results show that the EPBPI spot-welding simulation method can improve the accuracy of dynamic characteristic simulation of shell structure and provide a research method for spot-welding numerical simulation.

Key words: vehicle engineering, parameters identification, elastic-plastic beam elements, dynamic characteristics, simulation accuracy

CLC Number: 

  • U461
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