摘要
理论研究了两个同心圆柱壳体间通过周期环饭和附连流体的耦合效应。在环板内只有准纵波存在的假定下,给出环板的反作用力的表达式,并建立外壳体的声辐射解析表达式。无限长双层壳体的数值分析结果和舱段模型的实验结果一致。通过数值结果同时分析了声学流体和周期环板的载荷特征,以及它们对外壳体远场声辐射的影响。
The coupling effects between two concentric cylindrical shells with periodic annular plates as well as entrained fluid are investigated theoretically. A formula for the reactive forces by the annular plates is derived on the assumption that only quasi-longitudinal waves exist in the annular plates and an analytical expression for acoustic radiation from the outer shell is developed. Comparisons of numerical results for infinite two-walled cylindrical shell to measured data for a cabin model are in good agreement. Numerical results are presented for analyzing the characteristics of the loadings due to the acoustic fluid and the periodic annular plates, and their influences on the outer shell＇s farfield acoustic radiation.
出处
《声学学报》
EI
CSCD
北大核心
2009年第1期87-95,共9页
Acta Acustica
关键词
耦合效应
圆柱壳体
环板
流体
周期
解析表达式
振动
反作用力
Acoustic emissions
Acoustic radiators
Acoustic wave propagation
Acoustic wave transmission
Acoustic waves
Acoustics
