基于设计波法的海洋核动力平台波浪载荷计算

Wave loads calculation of marine nuclear power platform based on design wave methods

我国首艘海洋核动力平台采用船型方案,由塔架软刚臂单点系泊装置长期定位于渤海海域。依据ABS规范规定的载荷控制参数,本文采用确定性法、随机性法和长期预报对平台的波浪载荷进行计算。对比3种不同方法得到的设计波参数和载荷最大值结果可知,确定性法由于只考虑了规则波,计算过程简单,但结果偏于保守;在随机性法中引入的危险率越小,设计波波高和载荷最大值都会越大,应根据设计要求进行取值;长期预报由于采用了波浪散布图并考虑了浪向概率分布,因此更加科学合理。计算结果可为同类型船体的波浪载荷计算提供参考。

The first marine nuclear power platform in China is a ship-shaped structure,located in Bohai Sea area with soft yoke mooring system.Based on the dominant control parameters specified in the ABS rules,this article adopts three different methods,including deterministic method,stochastic method and long-term responsemethod,to calculate the wave loads of the platform.Comparing the design wave parameters and maximum load values,we can see that deterministic method only considers the regular wave to make the calculation process simple and the results conservative,the smaller the risk rate in stochastic method is,the larger the design wave height and maximum load values become,so the risk rate should be selected according to the design requirements,long-term response method is more scientific and reasonable due to using the wave scatter diagram and considering the wave direction probability distribution.The results can provide a helpful reference for the wave loads calculation for the same type of ships.