管路敷设橡胶层对圆柱壳结构振动与声辐射的影响

摘要

以内部设有管路的圆柱壳结构为研究对象,采用结构有限元耦合流体边界元算法,针对管路内、外敷设不同厚度橡胶层时,圆柱壳结构水下振动与声学特性进行数值计算,从圆柱壳结构振动位移和辐射噪声2个方面探讨管路内、外敷设橡胶层对圆柱壳结构水下振动与声辐射的影响.这对水下结构物的声学结构优化具有重要意义.结果表明:对于本算例,管路内、外敷设橡胶层对降低圆柱壳结构水下振动与辐射噪声具有良好效果,并且管路敷设橡胶层越厚,减振降噪效果越好.%A method called structural finite element coupled with fluid boundary element was adopted to calculate the underwater vibration and acoustic characters from a cylindrical shell including a pipeline was affected by the pipeline that surrounded by rubbers different in thickness. The effect of rubbers on the cylindrical shell underwater vibration and acoustic radiation was analyzed from vibration displacement and radiation noise of the cylindrical shell. This provides references for designing acoustic configuration of a underwater structure. The calculation showed that the pipeline surrounded by rubbers different in thickness also decreased the cylindrical shell's underwater radiation noise and vibration for this calculate ex-ample. And the thicker rubbers are, the more structural vibration and acoustic radiation are reduced.