LS-DYNA的ALE方法在圆盘击水滑跳中的应用

应用LS—DYNA的ALE方法,建立了击水弹跳有限元模型,并对圆盘击水弹跳现象进行了数值仿真。结果表明方法对研究圆盘击水弹跳现象是有效可行的。在此基础上,对圆盘击水弹跳的主要参数:入水角、俯仰角、初始速度和旋转角速度相互关系进行了仿真分析。给出了圆盘在水面成功弹跳临界速度、入水角与圆盘俯仰角的变化规律和圆盘旋转角速度与弹跳临界速度的关系。方法为研究伴有入水冲击的气/液两相跨介质运动提供了一种可行途径和方法。

Numerical Simulation Research on Bounce of Circular Disks Base on the ALE of LS-DYNA

Established finite element model of the bounce circular disks base on the ALE of LS-DYNA. First, the verified numerical simulation was finished, and the results show that our simulation is in good agreement with the experiment. Then, the article investigates the condition for the bounce of circular disks which impacts on the fluid surface. Bounce of the disk of the main parameters: into the water, the pitch Angle, initial velocity and angular velocity mutual relations between the simulation analysis. Given the disk on the surface of the water successful critical speed, enter the water bounce pitch Angle and the change rule of the disc and disk angular velocity and bounce critical speed of the relationship. The results can provide a research method and means for water-entry impact, air/water motion and dynamics research.