基于有限元法的水声构件声性能预报  

Prediction of acoustic performances of underwater acoustic structure based on finite element method

作　　者：孙好广[1] 周利生[1] 张德志[1] 

机构地区：[1]杭州应用声学研究所,杭州310012

出　　处：《声学技术》2007年第5期835-839,共5页Technical Acoustics

摘　　要：对水声构件的声性能进行有限元仿真研究,是因为水声构件的声性能不仅由材料本身的物理参数所决定,而且与其内部空腔形状与分布有关。通过反射波与入射波形成的驻波场声压可以直接计算出水声构件的吸声系数。对多种样品进行仿真与测量,两者结果较为一致。该法不受模型结构复杂性的限制,具有费时少、精度高的特点,为消声瓦等水声构件的声性能预报提供了保证。是预报水声构件声性能的一种便捷工具。Acoustic performances of underwater acoustic structure are studied based on finite element method, and results are determined directly by deriving the standing wave data formed by incident wave and reflected wave. Many examples are simulated and tested, and computer simulation results as well as measured data are more consistent. This method has lower computational cost, high-resolution and no limitation caused by the complexity of modal structure.So it could a easy way of predicting acoustic performances of anechoic coating and other underwater acoustic parts.

关 键 词：声学构件 吸声系数 驻波场 有限元法 

分 类 号：TB564[交通运输工程—水声工程]