Study on Estimatiing Method for Sea-keeping Qualities of High-speed Vessel

自1992年以来，我们一直在研究波浪中高速船舶的耐海性评估方法。本研究得到的主要结论如下：(1)航速小于Fn=0.4时，条形理论是有效的，航速大于Fn=0.4时，条形理论的估计精度变差。(2)对于横艉高速船舶，条形理论中的末项效应不可忽视。(3)无论是从实用角度还是从估计精度的角度来看，高速细长体理论（HSST）都是估计高速船舶耐波性的最有用的方法。(4)三维格林函数法存在线积分处理、自由曲面条件、离散面板数和CPU时间等数值问题，有待改进。(5)朗肯源法具有可以改变自由曲面条件等优点，是最有前途的理论。然而，高速船舶横尾周围的定常扰动处理还有待改进

We have studied on estimating method for sea-keeping qualities for high-speed vessel in waves since 1992. The main conclusions obtained in this study are summarized as follows :(1) Strip theory is valid for the ship speed of less than Fn=0.4, and the estimating accuracy worsens at the ship speed of more than Fn=0.4.(2) The end term effect in strip theory can not be neglected for a high-speed vessel with a transomstern.(3) The 2 and half dimensional theory, which is called the high-speed slenderbody theory (HSST), is the most useful method for estimation of seakeeping qualities of high-speed vessel from both a practical standpoint and a standpoint of estimating accuracy.(4) The three-dimensional Green function method has some numerical problems such as the treatment of line integral, a free surface condiotion, the number of discretized panels and CPU time which should be improved in the near future.(5) The rankine source method is to be the most promising theory, because it has merits which we can change a free surface condition etc. However, the treatment of steady disturbance around the transom stern of a high-speed vessel should be improved