机械科学与技术2017，Vol.36Issue(12)：1964-1969,6.DOI:10.13433/j.cnki.1003-8728.2017.1225
航空发动机机匣螺栓连接结构力学特性影响因素
Analysis of Influencing Factors on Mechanical Characteristics of Bolt Connection Structure in Aircraft Engine
摘要
Abstract
Since the aircraft engine casing is a non-continuous structure,which will affect the aircraft engine casing vibration characteristics.In the study of the vibration characteristics of the conventional stator box components,the bolt connection structure of the casing installation side is often neglected,resulting in a large deviation in the vibration simulation results.In this study,the finite element analysis model of bolted connection structure is established based on the finite element method.The influence of bolt preload,bolt distribution and bolt number on the bending stiffness and vibration frequency of the casing is studied.The results show that,due to the presence of the bolted connection structure,the structural rigidity of the casing is reduced.The bolt pretension,distribution and the number of bolts are the main factors that affect the bending stiffness and vibration frequency of an aero-engine case.关键词
力学特性/接触刚度/螺栓连接结构/振动分析Key words
mechanical properties/contact stiffness/bolt connection structure/vibration analysis分类
机械制造引用本文复制引用
孙衍山,曾周末,杨昊..航空发动机机匣螺栓连接结构力学特性影响因素[J].机械科学与技术,2017,36(12):1964-1969,6.基金项目
国家重点基础研究发展计划项目(2011cb610505)与国家自然科学基金项目(61240038)资助 （2011cb610505）
