摘要
采用多物质ALE(Arbitrary Lagrangian-Eulerian)仿真方法,对球体入水时引发的水花、空泡及其所受冲击力等内容进行了系统的研究。首先,将通过仿真得到的水花和空泡的发展过程与实验、理论数据的对比,证明多物质ALE方法不但可以再现结构入水的复杂过程,还能较好地反映密度,冲击速度及表面亲水性等因素的影响;进而,计算了分析了小球入水时所受冲击力系数的变化规律;最后,研究了并行计算对提高大规模流—固耦合问题计算效率的效果。结果表明:多物质ALE流—固耦合方法是仿真结构入水过程的有效手段,而优化后并行计算技术则可大大提高复杂结构入水时的仿真计算效率。
Abstract ：The water splash, bubble triggered by sphere impact onto the water, and the impact coefficient of water entry were systematically studied based on ALE （Arbitrary Lagrangian-Eulerian） multi-material method. The ALE multi-material method＇s capability to reproduce the complex process of water enter, and the abilities to reflect the density, impact velocity and surface hydrophilic and other factors＇ influences on the splash and bubble, were proved by means of comparing the simulation results and the experimental, the- oretical data, and the impact coefficients were analyzed through simulation. Finally, the computational effi- ciency of parallel computing to solve large-scale fluid-structure interaction problem was discussed. The results show that the fluid-structure interaction simulation method based on ALE multi-material formula- tion is an effective way to simulate water entry process, and the optimized parallel computing technology can greatly improve simulation efficiency of solving large-scale complex water entry analysis model.
出处
《船舶力学》
EI
CSCD
北大核心
2014年第1期28-36,共9页
Journal of Ship Mechanics
基金
国家高技术研究发展计划(2012AA01AA307)
国家自然科学基金资助项目(11072150
61073088)
关键词
多物质ALE算法
入水问题
水花
空泡
冲击系数
并行计算
ALE multi-material formulation
water entry problem
splash
bubble
impact coefficient
parallel computing
作者简介
张伟伟（1983-），男，上海交通大学博士生，Email：wwzhangsjtu@sjtu．edu．cn；
金先龙（1961-），男，上海交通大学教授，Email：jxlong@sjtu．edu．cn。
