【作者】 王辉； 汪雪良； 舒蕾； 徐春；

【Author】 WANG Hui,WANG Xue-liang,SHU Lei,XU Chun(China Ship Scientific Research Center,Wuxi,Jiangsu,214082,China)

【机构】 中国船舶科学研究中心；

【摘要】 恶劣海况下船舶砰击压力的计算预报是一个难题,需要充分考虑海况、船舶的三维特点并计入船体升沉、纵摇、横摇等运动对实际砰击作用的影响,同时砰击系数的选取也是一个关键。本文根据三维砰击速度的定义,选取合适的砰击压力系数,采用时域耐波性理论对船体表面砰击压力进行直接计算预报,并与某大型LNG船典型艏外飘模型试验结果进行了对比分析。结果表明,本文采用的方法具有相当的合理性和可靠性,可应用于承受砰击载荷作用的船体局部结构的设计过程。更多还原

【Abstract】 Calculation and prediction of ship slamming pressures in severe seas is difficult for the sea conditions and 3d characteristics of ship hull must be totally considered,the influence of ship motions such as heaving,pitching and rolling should be included,the slamming coefficient is also a key factor to be determined.In this paper,based on 3d slamming velocity concept and chose proper slamming coefficient,time domain seakeeping method is adopted to do direct calculation of slamming pressures on ship hull.Finally,calculation results for one large LNG carrier are compared and analyzed with typical bow slamming model test.The comparison says that the method in this paper is reasonable and reliable and could be applied to the design procedure for ship local structures under slamming loads.更多还原