Analysis and Research of Stiffness Based on Body-in-White NVH

摘要

In this paper, the BIW of a car are analyzed by the torsional stiffness and bending stiffness and based on the mechanical model of the stiffness, which determined the boundary conditions and constraint loads. Consequently, the CAE model is established and analyzed of the stiffness calculation and experiment validation. It find out the resonance point that caused by the lack of rigidity of the car body to improve the local stiffness and achieve the goal of advancing the NVH performance of the whole car.