基于ANSYS的吸声覆盖层声学性能计算与分析

Simulation and analysis for acoustic performance of a sound absorption coating using ANSYS software

采用ANSYS有限元软件计算分析了平面波垂直入射条件下吸声覆盖层的声学性能。建立了NSYS中阻尼的输入量与材料损耗因子的关系。对含圆柱空腔的吸声覆盖层分别采用ANSYS和二维解析理论计算,结果表明该方法的正确性,指出在二维解析理论中简化吸声覆盖层单元为粘弹性圆柱管结构是足够精确的。

In the case of normal incidence, the acoustic performance of a sound absorption coating was analyzed by using ANSYS software. The relationship between damping item and loss factor of a material was obtained with ANSYS code. The acoustic performances of a sound absorption coating containing periodically distributed cylindrical cavities were evaluated with both ANSYS code and the two-dimensional analytic model, and their good agreements showed the applicability of ANSYS code. Furthermore, regarding the element of the coating as a viscoelastic cylindrical tube was accurate enough in the two-dimensional analytic model.