利用声辐射模态进行声功率的灵敏度分析

Acoustic sensitivity analysis of sound power using sound radiation modes

采用声辐射模态进行结构辐射声功率计算,具有消除结构振动模态中复杂耦合项的优点,使得计算结构声辐射变得简单。结构声学灵敏度分析包括三类设计变量,以往绝大多数的研究只对其中一类或者两类设计变量进行了分析。采用声辐射模态的方法,对全部三类设计变量进行声学灵敏度分析。对球源声辐射模型进行仿真,该方法计算结果接近理论解,由此证明了该方法的有效性。

When sound radiation modes are used to calculate sound radiation power,complicated coupling items between vibration modes can be avoided.Deign variables may be classified as three categories in structure-acoustic sensitivity analysis.Only one or two categories of design variables have been studied previously.In the paper,acoustic sensitivity of all types of design variables was studied using sound radiation modes method.The simulation on a spherical sound radiation model proves the effectiveness of the method presented.