车室声固耦合模态分析研究

Study on Acoustic-solid Coupling Modal Analysis of Vehicle Compartment

通过建立车身模型,使用LMS Virtual Lab软件仿真,求得车身模态振型,建立车腔模型,仿真出有无座椅两种状态下的声学模态,通过车身模型和声腔模型建立耦合模型,仿真出声固耦合模态参数.通过模态参数找出模态振型位置,为改善车内乘客的舒适性,提供依据.

Through the establishment of the body model, using LMS Virtual Lab software simulation, the body mode shape is obtained, the vehicle cavity model is established, and the acoustic mode is simulated in the presence or absence of the seat. The coupling model is established by the vehicle body model and the acoustic cavity model, and the acoustic - solid coupling modal parameters are simulated. Modal parameters are found out by modal parameters to provide basis for improving the comfort of passengers in the vehicle.