Numerical Study On SEA Parameter Between Plate And Curved Plate

With the development of modern shipping technology, the power of the dynamical machine is gradually enhanced. So the vibration energy is increasing. Also, the structure is getting light and thin, which induced more vibration and acoustic noise in the structures. This influences both the comfort of the shipman and the equipments' work. If we can forecast the characteristic of the vibration and sound transmission when we are product designing, we can solve the vibration and acoustic noise problems effectively. If all kinds of means to reduce vibration and acoustic noise after the whole design, we can only partly solve the facing problem in most cases and cost more. And install acoustics equipment in ship after building is more expensive. So the research on the vibration and the energy exchange between structures has significant importance.SEA is widely used to predict the structure's vibration and the sound transmission in the middle-frequency and high-frequency ranges. Coupling loss factor is the only representative parameter in the exchange of coupling system in SEA main parameters. For mechanical structure, if we know the transform principle between the coupling structures and the alteration rule between the structure's parameters, we can change some key structure positions' parameter to improve the power flow transmission's characteristic in the coupling systems and realize the vibration control.In this paper, the author throws research on the energy balance mechanism of in-plane plate system using the classical statistical energy equivalent equation and creates the model between the plate and curved plate by ANSYS. Then, the model is transmitted into AUTOSEA to form structure coupling SEA model. Numerical simulations compute the modal densities of curved plates at six kinds of curvature radius and the coupling loss factors of the junction from plate to plate, from plate to curved plate of different curvature radius, and from curved plate to curved plate. Numerical results obtained in this paper is analyzed and discussed. Some valuable conclusions for engineering application are drawn.