论文总字数：23816字

摘 要

火箭舱段连接接头一般采用包带式装置连接，包带式连接装置凭借其结构简单、可靠性高等特点，常被航天工业用于航天器与运载火箭、火箭各级舱室之间的连接。采用ABAQUS/explicit非线性仿真模块建立有限元模型，模型由上端框、下端框、包带、包带压块四部分组成，模拟包带实际安装和服役过程，分别设置推进、收紧和拉脱三个分析步，并采用运动学面-面接触与通用接触算法，探讨包带V型槽、上下端框V型缘的倾斜角度和端框初始半径值的改变对包带装置的端框连接面接触应力分布情况、包带装置整体Mises应力分布情况、装置的轴向载荷值和极限承载能力的影响，初步可以得出如下结论：

（1）倾斜角度值的改变对端框接触应力分布影响较弱；随着角度值的增加，包带的最大应力值先降低后增加，装置的轴向载荷值和极限承载能力先增加后降低。当倾斜角度选取15°时包带的应力值最低，装置的轴向载荷值和极限承载力最高，装置的安全性和可靠性最佳。

（2）随着端框初始半径的增加，装置轴向载荷值和极限承载能力也在不同程度的增加，但端框接触应力分布不均匀现象显重。然而，半径的过度增加也会引起包带整体应力分布不均匀，进而导致拉脱过程局部区域率先屈服破坏，严重降低装置的可靠性。因此，端框初始半径值越大并不代表装置承载能力越强，根据工程需要选择适合的半径值才是关键。

关键词：火箭舱段 包带连接 结构参数 力学性能

Influence of structural parameters on mechanical properties of cabin strap connection

Abstract

The connection joints of rocket cabin are generally connected with belted devices. The belted connection devices are used in aerospace industry for the connection between spacecraft and carrier rocket and the compartments at all levels due to their simple structure and high reliability. ABAQUS/explicit nonlinear simulation module is adopted to establish the finite element model, the model consists of the upper box and bottom box, bag, bag briquetting of four parts, simulation package with the actual installation and service process, respectively set up to promote, tighten and pulled off three step analysis, and the kinematics of plane - surface contact with general contact algorithm, and discuss with V groove, terminal box v-shaped edge initial radius of the tilt Angle and the end of the box for the tape device terminal box covering device junction surface contact stress distribution, the overall Mises stress distribution, installation of the influence of axial load value and the ultimate bearing capacity, preliminary conclusions can be drawn as follows:

（1）the change of Angle has a weak influence on the distribution of contact stress of the end frame; With the increase of the Angle value, the maximum stress value of the package decreases first and then increases, while the axial load value and ultimate bearing capacity of device increase first and then decrease. When the Angle is 15°, the stress value of the belt is lowest, Axial load value and the ultimate bearing capacity of device are the highest, Safety and reliability of device are the best.

（2）with the increase of the initial radius of the end frame, the axial load value and the ultimate bearing capacity of the device also increased to different degrees, but the uneven distribution of the contact stress of the end frame was significant. However, the excessive increase of the radius will also lead to uneven distribution of the overall stress of the belt, which will lead to the failure of the local region in the process of pull-out and seriously reduce the reliability of the device. Therefore, the larger the initial radius value of the end frame is, the stronger the bearing capacity of the device is. It is the key to select the appropriate radius value according to the engineering needs.

Key Words: Rocket compartment; Package with connecting ; Structural parameters; Mechanical properties

目录

摘 要 I

Abstract II

第一章 绪论 1

1.1研究背景及意义 1

1.2包带式连接装置国内外研究现状 1

1.2.1 包带式连接装置国内研究现状 1

1.2.2 包带式连接装置国外研究现状 2

1.3本课题主要研究内容 3

第二章 刚性包带推进、收紧、拉脱过程仿真分析 4

2.1刚性包带推进、收紧、拉脱过程有限元模型 4

2.2刚性包带推进、收紧、拉脱过程有限元结果 7

2.2.1 上下端框接触应力与装置轴向载荷 7

2.2.2 包带装置整体应力分布情况 8

2.2.3 包带装置的极限承载力 9

2.3 小结 10

第三章 不同倾斜角度对包带装置力学性能的影响 11

3.1不同倾斜角度下的刚性包带有限元模型 11

3.2不同倾斜角度下的包带有限元结果 12

3.2.1上下端框连接面接触应力分布情况 12

3.2.2刚性包带应力分布情况 14

3.2.2上下端框整体应力分布情况 16

3.2.3包带装置的轴向载荷 17

3.2.4包带装置的极限承载能力 19

3.3不同倾斜角度的包带模拟结果对比分析 20

3.4小结 21

第四章 包带端框初始半径对包带装置力学性能的影响 22

4.1不同初始半径下的刚性包带有限元模型 22

4.2不同初始半径下的包带有限元结果 23

4.2.1上下端框连接面接触应力分布情况 23

4.2.2 包带整体应力分布 24

4.2.3 端框整体应力分布 26

4.2.4 装置的轴向载荷 28

4.2.5装置的极限承载能力 30

4.3不同初始半径下的包带模拟结果对比分析 32

4.4 小结 32

第五章 经济性分析 33

第六章 结 论 34

参考文献 35

致谢 38

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