【作者】 崔岩； 吴卫； 刘桦；

【Author】 CUI Yan WU Wei LIU Hua (School of Naval Architecture.Ocean and Civil Engineering.Shanghai Jiao Tong University,Shanghai 200240.China)

【机构】 上海交通大学船舶海洋与建筑工程学院；

【摘要】 新型 LNG 船的液仓内液体晃荡涉及非线性自由表面大变形运动．针对容器的运动所激发的内部流体的强迫晃荡问题,运用光滑质点水动力学(SPH)方法对二维矩形水槽的纵荡问题进行了数值模拟．文中给出了液面最大振幅与容器相对振动频率的关系,并与现有的实验结果进行了比较．结果表明,当容器振动频率接近一阶模态时,最大振幅出现最大值．对大幅震荡和自由液面破碎情况,SPH 方法有其独特的优越性．更多还原

【Abstract】 Sloshing in LNG tankers refers to extremely large deformation of the nonlinear free surface.Aiming at the compulsive sloshing of inner fluid induced by containers’ motion,a study on the application of the Smoothed Particle Hydrodynamics (SPH) to the simulation of the surge phenomenon in a two dimensional rectangular tank is presented.In this paper,the relationship between the highest wave elevation and the excitation frequency of the tank is given and compared with experimental results reported before.According to our results,the highest wave elevation reaches its peak when the excitation period is closed to the highest natural period.The SPH method has its superiority in simulating the cases of violent excitation and wave breaking.更多还原