3D nonlinear hydrodynamic analysis of vertical cylinder during earthquakes. I: Rigid motion
3D nonlinear hydrodynamic analysis of vertical cylinder during earthquakes. I: Rigid motion
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DOI：
10.1061/(asce)0733-9399(1997)123:5(458
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发表时间：
1997-05
期刊：
影响因子：
--
通讯作者：
Bang Chen
中科院分区：
文献类型：
--
作者：
Bang Chen
建立了一个有限差分格式，求解了地震作用下作用在刚性直立圆柱上的非线性动水压力。进行了完整的三维（3D）分析;不仅使用三维运动方程，而且分析中还包括地面加速度三个分量的同时作用。研究了圆柱尺寸因子[（定义为2a/d 0（a=圆柱半径，d 0 =原状水深）]]对动水压力的影响。流体动压分布随着尺寸因子的增加而增加。当尺寸因子等于1时，圆柱面在θ= 0°处的动水压力是垂直板上动水压力的一半，当尺寸因子趋于无穷大时，动水压力将趋于完全相同的压力。讨论了对流加速度和表面波的非线性效应。文中提出了两个水平分量的结果线性叠加的原理。
A finite-difference scheme was developed to solve nonlinear hydrodynamic pressures acting on a rigid vertical offshore cylinder during earthquakes. A complete three-dimensional (3D) analysis was conducted; not only were the three-dimensional equations of motion used, but the simultaneous action of three components of ground acceleration was also included in the analysis. The influence of the size factor [(defined as 2a/d0 (a= the radius of the cylinder and d0= the undisturbed water depth)] of the cylinder on hydrodynamic pressure was studied. The hydrodynamic pressure profile increases as the size factor increases. When the size factor is equal to one, the hydrodynamic pressure on the cylinder face at θ= 0° is one half of that on a vertical plate, and will approach exactly the same pressure when the size factor approaches infinity. The nonlinear effects of convective acceleration and surface wave are discussed. The principle of linear superposition of the results due to two horizontal components of ground...