摘要
本文从弹性力学的有矩薄壳理论和声学的亥姆霍兹积分形式解出发,提出以传递矩阵-边界元方法数值预报水下任意形弹性旋转薄壳受谐和力激励下振动和声辐射.文中以水下球壳作为典型模型对计算程序进行了验证计算,并以流线形壳体尾部受激振动为例,对其辐射声指向性进行了数值预报和实验测量,计算结果与实验结果基本吻合.从而表明这种数值预报方法在工程上的可行性.
A combined transfer matrix and boundary element method (CTBM) is presented for predicting the vibration and sound radiation of a submerged revolutionary shell by harmonic force.The results of CTBM show a good agreement with the results of special function method, where a submerged spherical shell is used as a typical example.Then, the sound radiation from a streamlined revolutionary shell is studied, where a point harmonic force acts upon the tail-end of the shell.When the sound radiation of excitor is considered, the results of CTBM agree well with the experime-ntal results.It shows that the CTBM is one of effective methods for predicting the vibration arid sound radiation of a submerged revolutionary shell.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
1989年第4期435-444,共10页
Journal of Harbin Engineering University
关键词
传递矩阵
边界元
耦合振动
声辐射
旋转薄壳
数值预报
transfer matrix
boundary element
coupling vibration
acoustical radiation
revolutionary shell
numerical prediction
