基于海况参数分析的船体梁载荷预报方法研究

利用三维势流理论在频域内计算载荷频率响应函数,在此基础上对船舶波浪载荷长短期预报方法进行了研究,分析了现有的长期预报方法,并提出只针对特定的一部分短期海况进行分析,以确定船舶在营运寿命期内航行于实际海况中的波浪载荷特征最大值。同时提出了一种基于多项式拟合的波浪载荷预报方法,建立了短期响应的最可能极值关于海浪有义波高与海浪平均向上跨零周期的函数,可以方便地确定响应的特征值。结果表明,提出的方法能够有效进行波浪载荷的预报,可供有关专业人员参考。

Study on Prediction Method of Hull Girder Wave-Induced Loads Based on Sea State Parameters Analysis

Conducting analysis only for a specific part of the short-term sea states was proposed, as an approach to determining maximum wave load characteristics, for a ship sailing in the actual wave conditions during the operating life, on the basis of study on existing short-term and long-term methods for wave load prediction. At the same time, a new wave load prediction method based on polynomial fitting was put forward, by expressing the most likely extremum of short-term analysis as the function of average zero up-crossing wave period and significant wave height. The calculation results showed that the proposed method could predict wave load effectively, which would be available for reference.