振動境界層における散逸エネルギーに関する研究 : 回転楕円体の無限流体中における低次モード解析解の導出

概要

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The outstanding obstacle to estimate vibration level is that precise damping of fluid and structure can not be estimated because the mechanism of damping has not been explicated. Recently, as fact as damping of fluid is concerned, dissipation energy in the periodic boundary layer has been computed by boundary element method. In this paper, the authors dealt with vertical oscillations of a floating prolate spheroid which is in rigid body and two node vibration. The authors analytically obtained v_b as velocity distribution in the boundary layer, dissipation energy in terms of using this v_b , and compared this dissipation energy with BEM analisys, and verified its validity. Moreover, the authors tried to make this dissipation energy non-dimensional. As a result, it has become clear that there exists a relationship between vibrational Reynolds number Rs and dissipation energy and also a relationship between L/B and dissipation energy.
社団法人日本船舶海洋工学会の論文