穿梭油船波浪载荷直接计算分析

Direct Calculation and Analysis of Wave Load on Shuttle Tanker

为准确评估穿梭油船的波浪载荷,应用基于RANKINE源的三维线性时域波浪载荷计算方法,对一艘穿梭油船进行波浪载荷计算分析,根据北大西洋波浪散布图,对波浪载荷进行长期预报,计算得到不同超越概率下的波浪载荷长期预报极值。并且与DNV GL规范计算值进行比较,对比结果表明:对于该型船舶规范计算不能得到合理的波浪载荷,应该采用直接计算法来评估此类船舶的波浪载荷。

A time-domain three-dimensional linear hydrodynamic method is applied to perform the calculation of wave loads on a shuttle tanker. With the data represented in the North Atlantic wave scatter diagram, the long-term prediction of the wave loads is carried out, and the long-term extreme values of wave loads with different exceedance probabilities are calculated. Comparison between the calculated values and that from the DNV GL rules shows that the simplified formula of the Rules can not give reasonable approximate wave loads of the shuttle tanker so that the direct calculation method should be used instead to get meaningful estimates.