According to a finite element model of the vehicle structure, this paper establishes the acoustic cavity model and the dy-namic model of the vehicle, takes the dynamic simulation analysis results as boundary condition of interior sound field and uses the analysis software virtual. Lab to calculate the sound pressure level of the driver' s ears, noise flux of the panel vibration and noise transmission function, and then optimizes the structure design to improve the NVH level. It is of great guiding significance to the vehi-cle design in the early stage.%根据某乘用车的结构有限元模型,建立了内声腔有限元模型、整车动力学模型.以Ad-ams/View动力学仿真分析结果作为室内声场分析的边界条件,利用分析软件Virtual.Lab计算出驾驶员耳部的声压级、结构钣金件振动声学贡献度以及噪声传递函数.再进行优化关键钣金件的拓扑形貌优化,从而改进了噪声灵敏度.该完整分析流程在车辆前期设计阶段有一定的指导意义.
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