近水面三维物体水动力导数的数值模拟

Numerical Simulation of Hydrodynamic Derivatives about Three-Dimensional Body near Free Surface

本文用压力波方法求解了近水面三维物体作操纵运动的水动力导数,运动可以是大幅度的,但自山面条件是线性的。整个问题由自由面上分布偶极子和物面上布置源汇来模拟以后。

The Pressure Wave Method for solving hydrodynamic derivatives acting on a three-dimensional body with manoeuvring motions near free surface is presented. The motion can be of large amplitude, and the free surface condition is linear. The problom is simulated by the distribution of singularities on the free surface and body surface, so the total flow is decomposed into a pressure wave problem and flow around a body in infinite fluid field. The analytic solution generated by the general distribution of pressure on free surface is simplified. As an application of the method, the hydrodynamic derivatives of a manoeuvring revolution-body are calculated, and compared with the results of PMM captive model tests.