机械科学与技术2018，Vol.37Issue(5)：804-809,6.DOI:10.13433/j.cnki.1003-8728.2018.0522
气瓶支架组合体动力模型参数修正与应用
Parameters Correction and Application of Dynamic Model for Gas Cylinder and Bracket
李修峰 1刘正山 1王浩攀 1朱建斌 2崔佳涛1
作者信息
- 1. 中国空间技术研究院通信卫星事业部,北京100094
- 2. 北京卫星环境工程研究所,北京100029
- 折叠
摘要
Abstract
Clearance fit is a kind of common mechanical connection in engineering,it usually introduces uncertain connection stiffness.A parameter correction method with bushing element is proposed in the paper and a set of stiffness coefficients which suits for the finite element analysis of gas cylinder and its bracket assembly with gap feature is obtained.Firstly,the finite element model of gas cylinder and its bracket assembly is built,the bolt fastener and clearance fit are simulated by multi-point constraint element and bushing element,respectively.Secondly,the modeling method of the assembly is modified and the agreement between the modal analysis results and the test results with the original given stiffness coefficients of bushing element is verified.Finally,the stiffness coefficients are corrected with the adaptive response surface optimization method and their rationality is verified.The corrected coefficients are applied to the design of a new bracket.The analytical frequency results agree well with the test frequency results and the maximum deviation is less than 4.5％.Therefore,the veracity of the corrected coefficients and generality of the correction method are verified.A helpful reference is offered for the design and analysis of the similar structure.关键词
气瓶支架/动力模型/模态分析/优化/参数修正Key words
gas cylinder and its bracket/dynamic model/modal analysis/optimization/parameter correction分类
航空航天引用本文复制引用
李修峰,刘正山,王浩攀,朱建斌,崔佳涛..气瓶支架组合体动力模型参数修正与应用[J].机械科学与技术,2018,37(5):804-809,6.
