Abstract:

The sound power sensitivity of viscoelastic damping plates is analyzed by using acoustic radiation modes. Two cases of plates, one with damping layer and the other with viscoelastic beams, are considered and compared. The influence of the thickness of the damping layer on the sound power sensitivity is found. The numerical examples show that it is effective for control of the sound power of plates by increasing suitably the thickness of the damping layer and locating reasonably the viscoelastic beams.

Key words: vibration and wave, acoustic radiation modes, viscoelastic damping, sensitivity analysis

摘要：

本文利用声辐射模态模型分析了粘弹性阻尼板的声功率灵敏度，考察了在板上加自由阻尼层和粘弹性梁的两种情况，揭示了阻尼厚度变化对声功率灵敏度的影响。结果表明，适当增加阻尼层厚度和合理配置粘弹性梁的形式能够有效地控制板辐射的声功率。

关键词: 振动与波, 声辐射模态, 粘弹性阻尼, 灵敏度分析