破碎波对桩柱的作用力及其流场的研究进展

Forces Induced by Breakers on piles and the Kinematics of Breakers

破碎波对桩柱结构的作用力是海洋工程和近岸工程中十分关心的问题。同进行波相比,破碎波的作用力要显著地加大,问题的处理也复杂得多。这一过程的物理本质至今尚未完全弄清。本文试图对这一问题以及与此密切相连的破碎波流场的研究情况作—概述,为进一步研究提供参考。

The recent major research results about breaking wave forces on piles and the flow fields of breaking waves are reviewed in this paper. When breaking waves act on piles, impact forces are observed in addition to drag and inertia forces. Two methods for calculating breaking wave forces are introduced. One calculates impact forces using Karman theories while drag and inertia forces using Morison equation. The other calculates total forces using empirical formulas. The characteristics of these two methods and the further investigation which should be made in order to improve existing methods are discussed. Four numerical methods for describing flow fields of breaking waves are also introduced, which are developed respectively by Longuet-Higgins & Cokelet, Vinje & Brevig, Mclver & Peregine, and Jansen. The principles ana procedures for these methods are discussed together with some experiment results.