Study on Influence Factors of Connection Stiffness of Rocket Structure

Abstract

Abstract: The rocket cabin docking connection stiffness was one of the important factors that affected the flight safety.At the same time，due to capacity constraints，the rocket structure was strict with the weight.The finite element simulation analysis method was adopted herein.The influence factors of the connection stiffness were analyzed and researched.The influence factors included connecting bolt preload，the thickness and distribution of bolts.The regular patterns of the influence factors on connection stiffness were obtained.The rocket structure design may be guided by these researches.

Key words: rocket, connection stiffness, influence factor, simulation analysis

摘要： 火箭舱段对接面的连接刚度是影响飞行安全性的重要因素之一，同时由于运载能力的约束，箭体结构设计过程中对质量的要求较为严格。通过有限元仿真分析，对箭体结构舱段对接面连接刚度的影响因素即连接螺栓预紧力、对接件厚度、螺栓分布等进行了分析研究，得出了各因素对刚度影响的规律，为后续箭体结构对接面的设计工作提供参考。

关键词: 火箭, 连接刚度, 影响因素, 仿真分析

CLC Number:

LI Cao;SHANG Xianyang;ZHOU Xin;LENG Yue. Study on Influence Factors of Connection Stiffness of Rocket Structure[J]. China Mechanical Engineering.

李操;商显扬;周鑫;冷月. 箭体结构连接刚度影响因素研究[J]. 中国机械工程.

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