摘要
针对水下结构振动与声辐射的耦合问题,重点研究了水下方盒结构在简谐激励作用下结构振动和声辐射间的相关性。在计算结构声振响应时,采用有限元结合边界元的算法,即在考虑流固耦合影响下采用有限元法计算结构的振动响应,在此基础上采用边界元法求解无限介质中的Helmholtz方程,从而求得结构的辐射声场。在结构振动和声辐射响应的基础上,计算了几个典型位置声辐射与激励点振动间的关联系数,讨论了它们的关联性。最后得出结论:除了激励源附近位置外,声辐射与结构振动间的关联性是很强的。
Based on the coupled acoustic-vibration feature for underwater structures, the correlation between vibration and sound radiation for a box structure is investigated. In calculating the acoustic- vibration response of the box, the FEM and BEM are used. FEM is used to obtain the vibration response due to the coupled fluid-solid interaction. Based on FEM results, BEM is used to obtain the sound radiation by solving the Helmholtz equation. Through the computing results, the correlation between several typical locations and the exciting location is established and some comments are made. In the end, the conclusions are drawn that the correlation between vibration and sound radiation is strong except near the exciting location.
出处
《中国舰船研究》
2008年第6期22-25,33,共5页
Chinese Journal of Ship Research
关键词
方盒结构
振动
声辐射
相关性
box structure
vibration
sound radiation
correlation
