大直径多圆柱体近海结构上的二阶辐射水动力  

Secpmd-Order Radiation Forces on Large Multi-Cylindrical Offshore Structures

作　　者：毕家驹[1] 宁风 

机构地区：[1]同济大学,上海200092

出　　处：《水动力学研究与进展（A辑）》1993年第3期296-301,共6页Chinese Journal of Hydrodynamics

摘　　要：本文提出了一种解析方法,用来研究由海底地面运动激励引起的大直径双圆柱体上的二阶辐射水动力问题。文中分析了激励频率和柱距等因素对二阶水动力的影响,将二阶水动力的各组成部分做了比较,还将二阶水动力与一阶水动力作了对比,并由此得出了有意义的结论。An analytical method is developed to ptedict the second-order hydrodynamic forces on two large vertical circular cylinders subjected to horizontal ground motion. The harmonic ground excitation contains a second-order component at twice the exciting frequency of the fundamental linear one.Influences of the exciting frequency and the spacing of the cylinders on the nonlinear interaction between them, of which not much has been studied so far, are analyzed separately. Comparisons are made between the components of second-order hydrodynamic force as well as between the first-order and second-order hydrodynamic forces. Some significant conclusions are obtained.

关 键 词：近海工程 辐射 非线性 二阶水动力 

分 类 号：O352[理学—流体力学]