Abstract: Based on the characteristics of the welded joints largely distributed on an automobile body, a simplified principle for building the finite element model of an automobile body is put forward. Applying it, the model of IVECO light bus body is built, and the dynamic analysis results of which are identical to the facts. It demonstrates further the correctness of the model, and provides a good basis for developing a new vehicle body.

Key words: Automobile body, Building models, Dynamic analysis, Spot weld