车辆乘坐室声学泄漏问题研究

Study on the Acoustic Leakage Problem in an Automobile Passenger Compartment

针对具有泄漏管道的弹性薄壁腔体提出了一种“声学泄漏边界条件”,在此基础上建立了车辆乘坐室声学泄漏分析的声振耦合有限元模型。采用该模型计算出某型国产轿车乘坐室声振耦合系统的前 2 0阶低阶特征频率 ,并将计算结果与相应的测量结果加以对比 。

A so called 'acoustic leakage boundary condition' is put forward for an elastic thin walled cavity containing a leakage conduit and introduced to set up an improving finite element model which can deal with the structure acoustic coupling analysis of the acoustic leakage problem in an automobile passenger compartment. Then the finite element model is used to calculate the first 20 low order eigenfrequencies about the coupled structure acoustic system of the passenger compartment of a home built saloon car. And computational results are compared well with those obtained experimentally.