基于SPH法的冰与船舶螺旋桨碰撞数值模拟

在结冰海域航行的船舶螺旋桨会因受到冰块的撞击而出现严重的损坏。该文建立了冰—桨碰撞计算模型,冰模型采用SPH(光滑粒子流体动力学)法,运用非线性有限元软件ANSYS/LS-DYNA数值模拟了螺旋桨与冰在不同速度、位置下碰撞和螺旋桨与不同半径冰碰撞下的动态响应。对比研究了在以上单一碰撞因素下桨的变形、单元最大应力以及碰撞过程中产生的碰撞力等响应差异,定性地得出上述因素对冰—桨碰撞的影响规律,为船舶螺旋桨抗冰性能的结构设计提供参考。

SPH-Based numerical simulation of ship propeller under ice impact

Ship propeller is serious damaged by ice impact in freezing seagoing areas. In this paper, ice-blade impact models are established, in which SPH(smoothed particle hydrodynamics) method is used in ice model. The dynamic responses of ice-blade collision with different speeds, impact positions and dif-ferent radii of ice are simulated by the nonlinear finite element software ANSYS/LS-DYNA. By changing a single collision factor above, different structural dynamic responses of damage deformation of the blade, blade elements maximum stress and impact force are carried out. Then the influence of the above factors is obtained,which provides reference for the structure design of ship propeller under ice impact.