基于特征函数展开方法计算水深变化区域驳船运动响应

本文主要研究在近岸水深变化区域两维矩形驳船的运动.变化底部被分解为连续的阶梯且驳船所在流体域被划分为一系列矩形子域.在每个流体子域中采用特征函数展开方法表达速度势,并通过连续性假设求解速度势的值.文中对计算方法的收敛性进行了讨论并给出表达式中参数的推荐值.本文计算驳船在平底和斜底条件下的水动力系数并与文献结果进行对比,同时把驳船在非规则波中的运动响应与水池试验结果进行了对比验证.

Motion Responses of Barge in Variable Bathymetry Regions Based on Eigen-function Expansion Method

A two-dimensional rectangular barge floating in variable bathymetry region is considered. The variable bathymetry is decomposed into a succession of steps and the fluid domain can be divided into a series of rectangular sub-domains. The eigenfunction expansion is used for the velocity poten?tial defined in each region. The solution of velocity potential can be obtained based on the continuity hypothesis. The convergence of computational model is discussed and the parameters in the eigenfunc?tion expansion method are suggested. The hydrodynamic coefficients of the barge under both the flat bottom and inclined bottom conditions are calculated and compared with the results in the literature. And motion responses of the barge in irregular waves are verified by the experimental results.