基于CFD技术的砰击载荷强度直接计算

研究基于CFD技术的船舶砰击载荷预报及强度的直接计算,以通过对船波相对运动的短期预报得到入水速度极值,由积分变换得到入水速度的时历曲线,以CFD软件实现船体典型剖面入水砰击载荷的计算,得到船体剖面压力的空间分布,结果表明,船体剖面的压力随着位置高度的增加呈减小趋势,最后通过对某集装箱船进行有限元强度评估,验证了本文砰击强度直接计算方法的合理性和实用性。

Direct Calculation Method of Slamming Loads and StrengthBased on CFD Technology

The prediction of slamming loads and the direct calculation of strength is based on CFD technology. The extreme value of velocity is obtained by short-term prediction of the relative motion between the ship and the wave surface. To get the velocity time history, integral transform is necessary. The slamming loads are calculated by CFD software which can also get the spatial distribution of hull typical section pressure. The result indicates that the pressure of the hull section decreases with the increase of height. Finally the finite element strength evaluation of a container verifies the rationality and practicality of the direct calculation method.