异常荷载下导弹（火箭）级间连接结构失效分析

doi:10.3969/j.issn.1000-1093.2020.02.022

兵工学报 ›› 2020, Vol. 41 ›› Issue (2): 388-397.doi: 10.3969/j.issn.1000-1093.2020.02.022

异常荷载下导弹（火箭）级间连接结构失效分析

田彤辉¹，袁杰红¹，王青文¹，关振群²，陈柏生³

(1.国防科技大学空天科学学院, 湖南长沙 410073； 2.大连理工大学工业装备结构分析国家重点实验室，辽宁大连 116024；3.湖南大学土木工程学院，湖南长沙 410082)

收稿日期:2019-04-01 修回日期:2019-04-01 上线日期:2020-04-04
通讯作者: 袁杰红（1965—），教授，硕士生导师，博士 E-mail:yuanjiehong@nudt.edu.cn
作者简介:田彤辉(1994—), 男, 硕士研究生。E-mail: tiantonghui16@nudt.edu.cn
基金资助:
国家安全重大基础研究计划项目(6132770201-2)

Research on the Failure of Bolted Flange Connection Structure between Stages of the Missiles (Rockets) under the AbnormalLoad

TIAN Tonghui¹, YUAN Jiehong¹, WANG Qingwen¹, GUAN Zhenqun², CHEN Baisheng³

(1.College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, Hunan, China;2.State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, Liaoning, China; 3.College of Civil Engineering, Hunan University, Changsha 410082, Hunan, China)

Received:2019-04-01 Revised:2019-04-01 Online:2020-04-04

摘要/Abstract

摘要： 依据导弹（火箭）级间螺栓法兰连接结构特点，简化制作两组原理性实验件，设计进行了横向冲击和准静态荷载两种工况作用下连接结构失效实验。通过对比两种加载速率下的破坏结果，分析冲击力、加载力、螺栓响应数据和连接界面开缝位移数据，总结了连接结构的失效机理。此外，建立了针对连接结构失效进程仿真的有限元模型，并通过实测数据对其检验校核。研究结果表明：连接结构在横向异常荷载作用下呈序列失效特点，单个螺栓由于法兰盘“杠杆效应“存在明显弯曲变形，实际失效模式为“拉弯耦合”失效；冲击加载下螺栓材料“应变率效应”不显著，在本构模型的选择上可暂时不考虑动态加载的“应变率效应”；与实测数据对比可见，基于Abaqus显式算法的仿真模型，对连接结构失效进程的模拟误差在15%以内，工程中可以认为数值仿真得出的结论是可靠的。

关键词: 导弹, 火箭, 螺栓法兰连接结构, 冲击荷载, 准静态荷载, 失效机理, 有限元模型

Abstract: According to the structural characteristics of the bolted flange connection structure between stages of the missiles (rockets), two sets of simplified principle test specimens were manufactured, and the failure experiments of connection structure under impact and quasi-static loads were designed and carried out. The response data of bolts and the slotted displacement of connecting interface are analyzed by comparing the failure results under the action of impact force and quasi-static loading force, and the failure mechanism of connection structure is summarized. A finite element model is established to stimulate the failure process of connection structure, which is verified by the measured data. The research results indicate that the connection structure shows a sequential failure mode under the transverse abnormal load, and the actual failure mode of single bolt is “stretching-bending coupling” failure due to the obvious bending deformation caused by the “leverage effect” of flange. The “strain rate effect” of bolt material under impact loading is not significant, and the “strain rate effect” of dynamic loading can be temporarily ignored in the choice of constitutive model in simulation. It can be seen from the comparison with the measured data that the simulation model based on the explicit algorithm of Abaqus has the simulation error of failure process of connection structure within 15%, and the conclusion obtained by the numerical simulation can be considered to be reliable in the engineering. Key

Key words: missile, rocket, boltedflangeconnectionstructure, impactload, quasi-staticload, failuremechanism, finiteelementmodel

中图分类号:

田彤辉，袁杰红，王青文，关振群，陈柏生. 异常荷载下导弹（火箭）级间连接结构失效分析[J]. 兵工学报, 2020, 41(2): 388-397.

TIAN Tonghui, YUAN Jiehong, WANG Qingwen, GUAN Zhenqun, CHEN Baisheng. Research on the Failure of Bolted Flange Connection Structure between Stages of the Missiles (Rockets) under the AbnormalLoad[J]. Acta Armamentarii, 2020, 41(2): 388-397.

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异常荷载下导弹（火箭）级间连接结构失效分析

Research on the Failure of Bolted Flange Connection Structure between Stages of the Missiles (Rockets) under the AbnormalLoad

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