摘要
为了预报滑行艇在静水中的运动姿态及垂向力分布情况,采用2D+t势流方法,将滑行艇直航问题转化为二维剖面入水砰击问题,建立滑行艇静水运动姿态的时域预报模型.对滑行艇剖面入水砰击载荷采用MLM(改进Logvinovich模型)砰击模型进行计算,并针对2D+t理论对滑行艇静压力及首尾部水动力三维效应预报的不足之处进行了改进.针对滑行艇约束模,改进2D+t方法得到的垂向力沿船长方向分布情况能够与三维黏流CFD(计算流体力学)结果符合较好;针对自由模,改进2D+t方法得到的运动姿态能够与模型试验结果符合较好,证明了改进2D+t方法对滑行艇在静水中的水动力问题具有较好的预报精度.
To predict the motion attitude and the vertical force distribution of the planing hull in calm water,by using 2D+t potential theory,the direct navigation problem of a planing hull was transformed into the water entry slamming problem of a two-dimensional section,and a time-domain model was established to predict the attitude of planing hull in calm water.The modified Logvinovich model(MLM)was utilized to calculate the slamming load of the two-dimensional planing hull section,and a correction method was proposed to make up the deficiency of 2D+t theory in predicting the hydrostatic pressure and the hydrodynamic pressure of planning hull near bow and stern region.For the restricted ship model,the vertical force distribution results of modified 2D+t method are in good agreement with that of the three-dimension computational fluid dynamics(CFD)method.For the free ship model,the motion attitude results of modified 2D+t method are in good agreement with that of the experiment.The high prediciton accuracy of the modified 2D+t method for the hydrodynamic problem of planing hull in calm water was verified.
作者
邵文勃
马山
张益凡
SHAO Wenbo;MA Shan;ZHANG Yifan(College of Shipbuilding Engineering,Harbin Engineering University,Harbin 150001,China)
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2024年第4期71-75,共5页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(52071098)
中央高校基本科研业务费专项资金资助项目(3072022FSC0101)。
关键词
滑行艇
2D+t方法
MLM砰击模型
静水姿态
势流理论
planing hull
2D+t method
MLM slamming model
attitude in calm water
potential flow theory
