A generalized approach to the mechanics of three-dimensional nonlinear ocean waves

详细信息    查看全文

• 作者：Aless ; ra Romolo ; Felice Arena ; Valentina Laface
• 关键词：Ocean wave ; Nonlinear ; Wave group ; Wave mechanics ; Hydrodynamic force
• 刊名：Probabilistic Engineering Mechanics
• 出版年：January, 2014
• 年：2014
• 卷：35
• 期：Complete
• 页码：96-107
• 全文大小：1882 K

文摘

The paper suggests a generalized approach to the analysis of second-order three-dimensional random wave fields that can represent either ocean waves in an undisturbed field or standing ocean waves. A nonlinear stochastic family is introduced that has a linear stationary Gaussian random contribution and a second-order correction exact in a Stokes expansion. This family can describe the nonlinear mechanics of a random wave field. Subsequently, in the considered random ocean field, the nonlinear mechanics of wave groups can be investigated conditional to the occurrence of a very high wave. The free-surface displacement and velocity potential may be obtained, as well as the nonlinear wave velocity and acceleration, for both the stochastic family and the very high wave groups. The results are of interest for the analysis of nonlinear wave kinematics when extreme surface wave events occur and thus for Morison鈥瞫 wave forces on slender structures.