【作者】 刘静；

【导师】 洪亮；

【作者基本信息】 南京理工大学 ， 兵器发射理论与技术， 2010， 硕士

【摘要】 本文主要研究了地效飞机入水的载荷特性,应用ANSYS/LS-DYNA有限元软件建立了计算模型,利用流固耦合算法对地效飞机着水过程进行了仿真。本文首先介绍了国内外对地效飞机和结构物入水研究的发展状况以及有限元法的求解步骤和相关理论；其次描述了物理模型的生成、网格的划分以及关键字的设定。通过对地效飞机着水的数值求解,作者得到了地效飞机着水时出现空气夹层、着水后发生溅水和水中压力波传播的三维效应；之后分析了地效飞机着水过程中速度、加速度的变化情况,得出加速度峰值大小与其出现的时刻；最后结合地效飞机着水过程中的速度和加速度变化曲线分析了主浮舟、小浮舟受载情况,并得到了地效飞机着水过程中的受载特性。总之,本论文的数值分析结果在一定程度上为地效飞机的结构设计提供了技术支持,对解决同类结构物的入水载荷问题也具有一定的参考价值。更多还原

【Abstract】 In this paper, the numerical analysis of the high-speed water entering of the Wing-In-Grade-Effect-Plane is carried by the Fluid-structure Interaction way of the ANSYS/LS-DYNA. Some significant conclusions are given through the analysis the simulating results.At the beginning of this paper, the research history development of the water-entry structure is reviewed. Secondly, the basic principle and solving steps of the FEM methods, as well as the calculating method are introduced. Through the Numerical Simulation of the high-speed water entering of the Wing-In-Ground-Effect-Plane, we get the 3D images of Entering the water, the water upheaval, splashing water, pressure-wave and the speed-acceleration curve.In one word, the results of this research and calculation may provide a technical support for the design of Wing-In- Ground-Effect-Plane in some degree, and also are useful for the dynamics analysis of other high-speed water entering structures.更多还原