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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Froude–Krylov force ： ウィキペディア英語版 Froude–Krylov force In fluid dynamics, the Froude–Krylov force—sometimes also called the Froude–Kriloff force—is a hydrodynamical force named after William Froude and Alexei Krylov. The Froude–Krylov force is the force introduced by the unsteady pressure field generated by ''undisturbed'' waves. The Froude–Krylov force does, together with the diffraction force, make up the total non-viscous forces acting on a floating body in regular waves. The diffraction force is due to the floating body disturbing the waves. == Formulas == The Froude–Krylov force can be calculated from: :$$ \vec F_ = - \iint_ p ~ \vec n ~ ds, where *$\backslash vec\; F\_$ is the Froude–Krylov force, *$S\_w$ is the wetted surface of the floating body, *$p$ is the pressure in the undisturbed waves and *$\backslash vec\; n$ the body's normal vector pointing into the water. In the simplest case the formula may be expressed as the product of the wetted surface area (A) of the floating body, and the dynamic pressure acting from the waves on the body: :$$ F_ = A \cdot p_. The dynamic pressure, $p\_$, close to the surface, is given by: :$$ p_ = \rho \cdot g \cdot H/2 where *$\backslash rho$ is the sea water density (approx. 1030 kg/m³) *$g$ is the acceleration due to the earth’s gravity (9.81 m/s²) *$H$ is the wave height from crest to trough. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Froude–Krylov force」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.