平板構造物のパワーフロー制御に関する研究 : 渦巻きパワーフローによる局所封じ込め制御

概要

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This paper deals with the active power flow control of a simply supported thin plate. Particular emphasis is placed on the vortex power flow pattern that has the potential of confining external energy, a cause of exciting vibration modes, into a restricted area and of diverting the power flow out of a specific region where vibration is to be prohibited. With a view to observing the power flow occurring in a plate, a wave visualization system has been developed. Based upon the visualization system, it is verified experimentally that the vortex power flow can be produced at an arbitrary position of a plate. An energy stream function as well as a vorticity function is derived in a general form. Furthermore, both the energy stream and vorticity functions are calculated as a function of vibration modes which are selected in the order of magnitude of their contribution to the total kinetic energy of the plate. As a result, as many as 100 vibration modes are found to be necessary to form a vortex power flow pattern.
一般社団法人日本機械学会の論文
1996-08-25