TOTAL POWER FLOW FROM A VIBRATING RIGID BODY TO A THIN PANEL THROUGH MULTIPLE ELASTIC MOUNTS

When active control is used to reduce the vibration transmission through machine mounts into supporting structures, the vibratory power flow through the mounts is often used as the cost function to be minimized. This is because the mounts behave as vibration "sources" for the supporting structure and they have a finite number of degrees of freedom. To apply active control effectively to suspension systems, it is necessary to investigate the nature of the power flow from the vibrating machine to its supporting structure through the mounts. In this paper, a multi-mount suspension system is modeled analytically. The transmission of vibratory power flow from a vibrating rigid body into a thin supported panel through two elastic mounts is evaluated numerically. This power flow consists of the contributions from normal and shear stress forces, and moments. The magnitude of each power flow component is examined and the conditions under which the contribution of each component to the total power flow is significant, are addressed.