基于统计能量法的环肋圆柱壳中、高频振动与声辐射性能数值分析

Numerical Analysis of Middle-high Frequency Vibration and Sound Radiation from a Ring-stiffened Cylindrical Shell by SEA

基于统计能量法(SEA)对力激励下的环肋圆柱壳中、高频振动与声辐射性能进行了数值分析,通过与解析法计算结果的对比,证明了利用统计能量法进行圆柱壳中、高频振动与声辐射研究的可行性。重点分析了双层圆柱壳的振动与声辐射性能,得到一些有价值的结论。最后,对比分析了在相同激励力下的单、双层圆柱壳的声辐射性能,双层圆柱壳的外场辐射声压比单层圆柱壳的小。

In this paper, the statistical energy analyses （SEA） are used to analyze the middle - high frequency vibration and sound radiation from the cylindrical shell with ring stiffeners under force excitation. The numerical results agree very well to those obtained by analytic methods, which shows that the SEA is applicable to such problems. The paper concentrates on the vibration and sound radiation from a double cylindrical shell, and some useful conclusions are drawn. By comparison of the results obtained from single and double cylindrical shell, both under force excitation, it is found that the radiated sound pressure of double cylindrical shell is higher than that of single cylindrical shell.