摘要在各种航空航天飞行器中，航空涡轮发动机的转子转速都非常高。高速旋转的叶片 断裂丢失，其断片在作一定的空间运动后，将打击发动机机匣，对机匣在叶片撞击下的 破坏过程的力学分析将为机匣的包容设计提供依据，有利于工程产品的设计。虽然由于 科学技术的进步，非包容事件很少发生,但一旦发生就会导致严重的航空事故。因此,我 们发展适用的设计方法来包容高能量的叶片断片是很有必要的。本课题将侧重机匣在叶 片撞击下的包容能力研究，研究不同结构机匣对包容能力的影响，主要通过动力学分析 软件 LS-DYNA 数值模拟分析双层结构机匣间隙、多层结构机匣层数等对机匣包容能力的 影响。通过本论文的研究，将加深对所学力学理论的认识和提高运用力学理论进行建模、 方程求解、大型力学类软件使用、数值计算和仿真的能力。79445

毕业论文关键词 航空发动机 机匣 包容性 数值模拟

毕业设计说明书外文摘要 

Title Research on the containment of the aircraft engine casing under the impact of blade

Abstract Among all kinds of aerospace vehicle，the rotor speed of the aero turbine engine is very high。 Because of the loss of the high-speed rotating blade, it will hit the engine casing。 The mechanical analysis of casing in leaves under the impact of the failure process will provide the basis for the containment design of casing。 This is conducive to product engineering design。 Although due to the progress of science and technology, non-containment incident seldom occurs, once it happens it will lead serious aviation accident。 Therefore, adopting feasible design approaches to accommodate high-energy blades is necessitated。 This topic will focus on the research on the containment of the engine casing under the impact of blade。 The different structures of the casing influence on the ability of containment。 It is mainly through dynamic analysis software LS-DYNA numerical simulation to analyze the effect of double layer structure of machine casing clearance, multilayer casing layers of casing containment。 Through the research of this paper, we will deepen the understanding of the theory of mechanics and improve the ability of using the theory of mechanics to model, solve the equation of engineering problems, and use the software of large scale mechanics, numerical calculation and simulation。

Keywords  The aero-engine, casing, containment, numerical simulation

本科毕业设计说明书 第 I  页

目 次

1 绪论 1

1。1 研究背景… 1

1。2 国内外研究现状… 1

1。3 研究内容… 3

2 相关理论知识… 5

2。1 包容性概念… 5

2。2 包容能力评价方法… 5

2。3 本章小结… 8

3 机匣包容机理分析… 9

3。1