Abstract
In this paper, Hyperworks software is used for geometric cleaning, meshing and grid quality checking of the BIW model. The BIW model is assembled with solder joint units, and then the dynamic stiffness of the joints is analyzed. The acceleration frequency response function (IPI) curve is obtained by simulating the body with the method of origin admittance. The dynamic stiffness deficiency is found by comparing with the dynamic stiffness curve of the target value. Vibration transfer function of the body is obtained by vibration sensitivity analysis, and the sensitive parts of the body under excitation are located more accurately. Some corresponding suggestions and optimization are put forward to improve the NVH performance of the body.
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