限制水域浮体水动力特性研究

处理了浮体在限制水域作振荡运动时的水动力计算问题．计算结果表明：对于在振荡浮体两侧有全反射壁面的情形下，浮体水动力性能表现出奇异现象；这种现象完全不同于带有辐射边界条件的同类问题的解．两侧刚性壁面条件取代为无穷远辐射条件时，其结果是阻尼系数在全频域内对各种运动模式均为零解；附加质量在某些频段出现负值，且在某些频率下出现陡变现象．对这种水动力性态作了分析．

Research on hydrodynamic performance of float bodies in confined zone

This paper deals with the computation of hydrodynamic coefficient of float hody when oscillating in confined zone. On the condition that there are perfect reflectible boundaries on both sides of the oscillating float body, the computation results show the hydrodynamic coefficient appears to be an unusual performance. This performance has nothing to do with the solution of the same subject associated with the radiation boundary condition. Replace the solid wall on both sides with the infinite radiation conditions, the damping coefficient is zero for all kinds of motion pattern in the whole frequency domain and the value of the added rnass is negative in certain frequency domain and changes suddenly at special frequency. This paper analyzes such performance of hydrodynamic coefficient.