2D刚体椭圆头结构高速撞水模拟

郑金伟; 宗 智

doi:10.11993/j.issn.1673-1948.2008.02.003

2D刚体椭圆头结构高速撞水模拟

doi: 10.11993/j.issn.1673-1948.2008.02.003

郑金伟,
宗智

大连理工大学船舶工程学院,辽宁大连 116024

详细信息

作者简介:
郑金伟（1979- ) ，男，硕士，主要研究方向为椭圆头结构高速入水载荷特性分析.

中图分类号: TP 391.9
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- 被引次数: 0
出版历程
- 收稿日期: 2007-12-01
- 修回日期: 2008-01-18
- 刊出日期: 2008-04-30

Simulation of Two-dimensional Rigid Elliptic Head Structure Water Entry at High Speed

School of Naval Architecture Engineering, Dalian University of Technology, Dalian 116024, China

摘要

摘要: 2D刚体椭圆头结构高速撞击水面会受到来自水面的冲击力，由于撞水过程中会引起自由液面大幅波动和流固接触界面的非线性，载荷的大小很难使用常规动力学方法求解。本文利用ANSYS/LS-DYNA软件中的ALE算法对椭圆头结构高速入水问题进行了模拟，数值结果表明，在某一入水角度下，加速度峰值和入水速度呈幂次关系,压力峰值随着入水速度的增大而增大,入水角度在35. 时压力峰值最大。
- 结构入水 /
- 自由液面 /
- 流固接触界面 /
- 数值仿真 /
- ALE算法
Abstract: When a two-dimensional rigid elliptic head structure enters water at high speed, it endures tremendous impact arising from free water surface. It is very difficult to calculate the impact load by using normal dynamic method because of the nonlinearity of fluid-structure interface and the severe fluctuation of free water surface in the process of water entry. This paper simulates water entry of a structure with elliptic head by using the arbitrary Lagrangian-Eulerian(ALE) algorithm of ANSYS/LS-DYNA software. Simulation results show that the peaks in pressure curves increase with velocity of water entry, and there is a exponential relation between maximum acceleration and water entry velocity as this structure enters water at a specific angle. The maximum pressure appears when the angle is 35.
- structure water entry /
- free water surface /
- fluid-structure interface /
- numerical simulation /
- arbitrary Lagrangian-Eulerian(ALE) algorithm

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参考文献(12)

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