Localization of structural vibration and acoustic radiation through boundary conditioning

Structural response and the resulting sound radiation due to excitations ap plied at any point on the structure depend very strongly on the boundary co ndition. Constraining structural vibration to the local areas of interest a nd modifying vibrational behaviour of the entire structure have numerous ap plication s in sound and vibration control engineering. A concept of bounda ry conditioning has been proposed here in order to manipulate and control t he vibration behaviour of the structure. A plate structure has been analyze d for its response and numerical results demonstrate the localization of st ructural vibration to the region of excitation by creating additional bound aries and conditioning them to achieve proper stiffness. This study shows t hat it is possible to localize the vibration and to alter mode shapes by ad vntageously modifying the boundary stiffness values.