Lamb波在水下弹性板散射声场仿真实验

Simulation Experiments of Lamb Wave’s Scattering Sound Field on Underwater Elastic Plate

摘要:

利用有限元声场计算软件 COMSOL，仿真实验了 Lamb 波在水下弹性板直角板端反射并发生模态转换时的散射声场，通过对散射声场的分析，结合能量守恒定律，忽略杂散波(如棱角波)近似计算了 Lamb 波在水下弹性板直角板端的模态转换效率，并且与理论值进行了比较。

关键词:Lamb 波;COMSOL 仿真;模态转换效率

Abstract:

Using the finite element sound field computing software COMSOL，the simulation experiments are conducted on the scattering sound field when Lamb wave is reflected and conducts modal conversion at the right angle plate end of the underwater elastic plate. Through the analysis of the scattering sound field and in combination with the law of energy conservation，the modal conversion efficiency of Lamb wave at the right angle plate end of the underwater elastic plate is calculated by ignoring the clutter wave(such as angular wave)，and compared with the theoretical value.

Key words:Lamb wave;COMSOL simulation;modal conversion efficiency