摘要
给出了利用基于体积速度匹配的波叠加原理计算薄板辐射声功率的方法。该方法在获得薄板表面振动速度以后,通过线性化的欧拉方程建立虚拟声源强度与单元体积振速的代数方程,求解虚拟声源的强度,获得薄板的辐射声功率。文中以简支矩形有障薄板为例进行了声功率求取,并与解析法获得的结果进行了对比,表明波叠加计算法不需要获得结构的辐射阻就可以使用较少的单元数目获得较高的计算精度,从而提高了计算效率。
A method for calculating the radiation sound power from a thin plate is described using the principle of wave superposition. After getting the velocity of the surface, the method can be used to calculate the strength of virtual sound source and then getting sound power through building the equations between the virtual source strength and unit volume velocity using Euler equation. In this paper, an example of rectangular baffled plate with simply supported boundary is given to compare the compution result with the analytic result. It is shown that the mention method can reduce the unit and node number while it can ensure high precision without calculating the radiation resistance. The method reduces computing time and improves the efficiency.
出处
《舰船电子工程》
2015年第5期147-150,共4页
Ship Electronic Engineering
基金
商洛学院科研项目(编号:14SKY006)资助
关键词
波叠加
虚拟声源
声辐射
辐射声功率
wave superposition, virtual sound source, sound radiation, sound power
