摘要
提出利用声辐射模态结合结构模态研究声辐射问题 ,并且从物理和数学意义上对声辐射模态进行了解释。用声辐射模态研究外部声辐射的主要优点在于消除了结构模态中复杂的耦合项。本文以简支矩形板为例 ,通过瑞利积分公式计算了其在不同频率下的辐射效率 。
A new method for analysis of exterior sound radiation problem is developed by means of synthesizing radiation modes and structural modes. The physical characteristics and mathematical meaning of the radiation modes are presented. The main advantage of this approach is the elimination of the structural modes coupling terms which are usually very complex. Through the Rayleigh integral, the radiation efficiency of a simply supported rectangular panel is calculated under different frequencies. The difference of radiation efficiency between under structural modes and radiation modes is described in detail.
出处
《振动工程学报》
EI
CSCD
2000年第4期633-637,共5页
Journal of Vibration Engineering
基金
高校博士点基金资助项目 !(编号 :982 990 3)
关键词
声辐射模态
结构模态
简支矩形板
振动体
radiation modes
structural modes
radiation efficiency
simply supported rectangular panel
