船舶风载荷和流载荷数值模拟计算方法研究

Research on numerical simulation method applied in wind and current loads evaluation of ship

船舶在航行或定位过程中不仅会受到波浪力的作用,还会承受其他环境载荷的影响,包括风载荷和流载荷的影响,因此准确模拟船舶运动等方面时,不可忽略风载荷和流载荷的作用。该文对环境载荷的评估是基于求解数值方程的方法展开研究,方程采用目前应用较广的雷诺平均方程,结合S k-湍流模型封闭方程。数值计算方法对风载荷和流载荷的模拟效果分别采用某铺缆船和某钻井船这两种特殊作业船型进行了结果验证,计算给出的水平面内力/力矩系数与试验结果的比对吻合较好,这表明该方法能较好地模拟船体所承受的风载荷和流载荷,验证了数值计算方法的可靠性。

When ships are navigating or positioning, they are subjected to not only wave loads, but also other environmental influence including wind and current loads. The wind and current loads, which play a significant role in the simulation of ship motion, cannot be neglected. The wind and current loads were solved based on numerical Reynolds Averaged N-S equations which are combined with S k - t-o turbulence model in this article. The wind and current loads acting on two special working ships which are cable-laying ship and drilling ship were solved and validated. It is shown that the numerical results have a good agreement with model test results, and the numerical method is a proper choice for the wind and current loads simulation acting on ship surface. It also can be an adaptable method offered to engineer for the environmental loads evaluation.