摘要
当船舶出现破损淹舱或者在波浪中做横摇运动时,船体都会出现横倾,这会使得船舶在水面下的湿表面与正浮时不再相同,船体周围的非定常流场因此会发生改变。本文基于三维线性势流理论,使用奇点分布法对具有不同横倾角的Wigley III船型的非定常扰动速度势展开计算,进而求解Wigley III船型水动力系数与波浪激励力。计算结果表明,横倾对垂荡、横摇、纵摇水动力系数的影响比较明显;在顶浪下,横倾对横向的波浪激励力影响显著。
When ships are damaged or rolling in waves, ships will be heeling, whose wet surface will be different from the upright ones＇ and unsteady flow around will be changed. A Wigley III hull＇s unsteady perturbation flow is calculated in different heeling angles using source distribution method based on 3D potential flow theory, then its hydrodynamic coefficients and wave exciting forces are solved. Numerical result shows that heel has obvious effect on heave, roll, pitch hydrodynamic coefficients and influences lateral wave exciting forces greatly.
出处
《舰船科学技术》
北大核心
2015年第4期7-12,共6页
Ship Science and Technology
关键词
横倾
三维势流理论
水动力系数
波浪激励力
heel
3D potential flow theory
hydrodynamic coefficients
wave exciting force
