求解圆柱壳弯曲振动声辐射问题的一种近似解析法  

An Approximate Analytical Method for Bending Vibration and Acoustic Radiation of Long Cylindrical Shell

作　　者：夏齐强[1] 陈志坚[1] 艾海峰[1] 张朋涛 

机构地区：[1]海军工程大学船舶与动力学院,湖北武汉430033 [2]海军兵种指挥学院,广东广州510410

出　　处：《中国舰船研究》2011年第5期28-31,45,共5页Chinese Journal of Ship Research

基　　金："十一五"国防科技预研项目(4011101020101)

摘　　要：圆柱壳梁式弯曲振动是一种常见模态,其基于摆动柱声辐射理论。通过引入修正因子,将无限长柱的声压计算转换到有限长柱的声压计算中,提出一种求解圆柱壳弯曲振动声辐射问题的近似解析法。结合算例,计算了其弯曲振动的远场声学特性,并与广泛应用的边界元进行了比较。结果表明,两者具有较好的一致性,近似解析法简单快速,可作为工程评定方法。Bending vibration is an ordinary modal of the cylindrical shell.Based on the theory of sound radiation of oscillating cylinder,the acoustic radiation of finite cylindrical shell was transformed from infinite cylinder by introducing a modifying factor,an approximate analytical method for solving bending vibration and acoustic radiation of cylindrical shell was proposed.Taking a special long power cabin as an example,the characteristic of far filed acoustic pressure was calculated by the proposed method and boundary element method.The results show the two methods agree well.The proposed method has the advantages of convenient and fast,and it is suitable for engineering evaluation.

关 键 词：圆柱壳 弯曲振动 声辐射 解析法 

分 类 号：U661.44[交通运输工程—船舶及航道工程]