閉空間において振動または騒音を能動的に最小化したときの振動モードの挙動

抄録

Plate-cavity models have been investigated by many researchers in order to verify active minimization of acoustic potential energy in the cavity or structural kinetic energy of the plate. Structural modes of the plate can be manipulated by control forces to minimize the acoustic potential energy or structural kinetic energy. However, it is not straightforward to interpret the modal behaviors, because the structural modes couple with each other in such structural-acoustic coupled systems. Recently, structural modal acoustic potential energies have been formulated in order to facilitate to independently evaluate a contribution from each structural mode to the acoustic potential energy via interaction between structural modes. In this study, structural modal acoustic potential energies before and after control are analyzed by computer simulation, and the control mechanisms are interpreted by observing the modal behaviors.