【摘要】 以简支矩形板为例 ,通过声辐射模态控制结构噪声 ,并分析了声辐射模态的数学和物理意义 研究发现在中、低频时 ,辐射模态对应的辐射效率随着模态阶数的增加而迅速降低 本文以点力作动器作为控制力源 ,以声功率最小化为控制策略进行主动控制 并且进行了数值计算研究更多还原

【Abstract】 By means of radiation modes,a new method for active structural noise control is developed with the simply supported rectangular panel plates as examples.The physical characteristics and mathematical meaning of the radiation modes are represented.The radiation efficiency will be reduced quickly if mode number is increased at low frequency.The active control is achieved with pointforces as control force and the minimization of radiated acoustic power as control strategy.And the results of the simulations are carried out.更多还原