Total Improvement of Sea-Keeping Quality of Ships

船舶的耐波性是由多种因素组成的，必须从整体的角度对其进行评价。以往对船舶耐波性进行了大量的研究，但从总体角度评价船舶耐波性的研究还不够。今天，关于评估耐波性要素的理论工具似乎已经足够。因此，最重要的是将这些方法结合起来，使船舶耐波性得到全面的提高。本研究在回顾了以往船舶耐波性研究成果的基础上，从整体的角度思考了提高船舶耐波性研究的必要性。在此基础上，研究了波浪资料与船舶响应和附加波阻的关系，提出了确定大风浪条件的方法和新的波浪谱公式。此外，本文还以波浪中的操纵运动和浮体姿态控制为例，对提高船舶在波浪中的耐波性进行了研究。这些研究对于全面提高船舶在波浪中的耐波性也是有益的。

Sea-keeping quality of ships are composed of many kind of elements, and its evaluation must be made from the total view point. Number of researches of sea-keeping quality are made in the past, but evaluation from the total view point is not enough. Today, about the theoretical tool for evaluating the elements of sea-keeping quality seems to be enough. So, the most important point is to make the total improvement of sea-keeping quality combining those methods.In this research, we reviewed the results of the sea-keeping research in the past and considered the necessary point of research for improving the sea-keeping quality from the total point of view. As the results, we investigated in the relation of long-term wave data and ship responses and added wave resistance, proposed the method of determining tfie rough sea condition and new formulation of wave spectra. Furthermore, we extended our research into the maneuvering motion in waves and attitude control of floating body as examples for improving the sea-keeping quality in waves. These investigations will be also useful for total improvement of sea-keeping quality of ships in waves.