敷设被动约束层阻尼封闭箱体结构声振特征分析

Analysis of vibro-acoustic characteristics of a cavity with passive constrained layer damping

采用有限元法对敷设被动约束层阻尼封闭箱体结构声-固耦合模型进行声振特性分析,讨论了被动约束层阻尼的结构参数和敷设位置对箱体结构声振特性的影响.研究表明箱体敷设被动约束层阻尼后对减振降噪有明显作用,而且被动约束层阻尼的结构参数和敷设位置存在最优值.

The acoustic-structure coupled model of a cavity with passive constrained layer damping was established.And the finite element method was adopted to analyze its vibro-acoustic characteristics.Then the influences of structure parameters and treatment position on the vibro-acoustic characteristics were discussed.The studies show that the passive constrained layer damping can obviously reduce the vibration and noise and there are optimal values for the structure parameters and treatment position of passive constrained damping layer.