Study on the method of decoupling the modal interaction for plates in flexural vibration
YAN Xiuli, LI Na, YANG Jiating, WEI Xiangrun, HE Xiping*
(School of Physics and Information Technology, Shaanxi Normal University, Shaanxi Key Laboratory of Ultrasonics, Xi′an 710119, Shaanxi, China)
Abstract:
Under high-power state, unwanted modes of the plate may be excited. These unwanted modes may give rise to modal interactions and a range of nonlinear phenomena. In order to separate the desired mode from undesired close modes, the flat plate and steps plate are grooved.The best grooved position, width and thickness are obtained to by using finite element (FE) method. It shows that the best grooved position is near the secondary maximize displacement direction of the plates while the directivity patterns of the radiators basically are not affected.
KeyWords:
nonlinearity; groove; modal interaction
