考虑接触问题时某型导弹静动特性分析

【作者】 周韶园；

【导师】 张铎；

【作者基本信息】 西北工业大学 ， 飞行器设计， 2002， 硕士

【摘要】 接触问题广泛存在于工程结构之中，引起了工程技术人员的普遍关注和重视。考虑接触问题的有限元分析法是在传统的有限元法基础上发展起来的处理连接面接触问题的一种数值计算方法，它是弹性力学基础理论与有限元方法相结合的产物，是计算结构力学的一个重要分支。 本文首先简要介绍了接触问题的特点，对研究接触问题时所需要的接触参数、接触状态和接触判别条件进行了详细地叙述，给出一些简单、典型接触问题的解析解；然后在有限元法基础上，介绍当前解决弹性接触问题的一些数值计算方法，对虚杆法、超元技术、混合有限元法等方法的基本原理作一简要叙述；之后介绍两种连接结构接触问题，包括盘式连接问题、榫式连接问题，并通过考题验证该种处理方法的准确性；最后在考虑接触问题情况下，进行某型号导弹的弹身弹翼组合结构的静、动特性分析，从而验证基于接触理论有限元的软件在工程中的实用价值。更多还原

【Abstract】 The contact problem is widely existed in many structures, which draws the attentions from more and more engineers and technological researchers. The finite element analysis method based on contact problem is a numerical algorithm used for solving contact problem of connection interface, which is developed from the general FEM. This method is a combination of elasticity theory and FEM, also it is an important aspect of computational structure mechanics.First, the characteristic of the contact problem is briefly introduced in this thesis. Contact parameter contact state and contact condition, which are needed in contact problem research, are studied in detail. Theoretical results of some typical contact problems are derived in this thesis. Then on the basis of FEM, some algorithms such as void-rod element method super element method and mix FEM are presented simply. And then two kinds of contact problem of connection structure including flanged connection and tenon connection are discussed in brief. Some examples are given to testify the validity of the method. Finally, on the premise of contact problem, static stress analysis and dynamic analysis of a certain missile’s body-and-wings are given to verify the feasibility of this software.更多还原