航天推进技术研究院主办
[1]薛杰,张允涛,王珺,等.某减压阀连接结构动态冲击模拟分析研究[J].火箭推进,2022,48(04):72-80.
XUE Jie,ZHANG Yuntao,WANG Jun,et al.Analysis on dynamic impact simulation of the connection structure of a pressure reducing valve(PRV)[J].Journal of Rocket Propulsion,2022,48(04):72-80.
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XUE Jie,ZHANG Yuntao,WANG Jun,et al.Analysis on dynamic impact simulation of the connection structure of a pressure reducing valve(PRV)[J].Journal of Rocket Propulsion,2022,48(04):72-80.
某减压阀连接结构动态冲击模拟分析研究
《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]
卷:
48
期数:
2022年04期
页码:
72-80
栏目:
目次
出版日期:
2022-08-21
- Title:
- Analysis on dynamic impact simulation of the connection structure of a pressure reducing valve(PRV)
- 文章编号:
- 1672-9374(2022)04-0072-09
- 关键词:
- 减压阀 连接结构 冲击动力学 轴向力
- 分类号:
- TH212 TH213.3
- 文献标志码:
- A
- 摘要:
- 为了研究航天系统某减压阀在冲击试验过程中连接结构的力学特性,采用金属材料的弹塑性模型对该减压阀固定连接结构开展冲击动力学仿真分析,基于具有二阶精度的Hilber-Hughes-Taylor隐式积分算法,重点比较了两种固定连接结构中U形环、连接螺钉在冲击环境下出现的最大轴向力,并通过研究连接件对减压阀的压力变化进一步分析出冲击环境下连接件轴向力出现差异的力学机理。结果表明:固定连接结构在冲击过程中需要具有持续预紧力,才能保证连接结构不会产生阶段性逐渐变大的轴向力 冲击过程中连接件(U形环、螺钉)发生了材料屈服,会造成连接件剩余预紧力下降 固定连接结构能安全承受多次冲击环境的一个充分条件是冲击过程中固定连接件不发生材料屈服。
- Abstract:
- In order to study the mechanical characteristics of the connection structure of a pressure reducing valve(PRV)in the aerospace system during the impact test, an elastoplastic model of metal materials was used to carry out an impact dynamic simulation analysis on the fixed connecting structure of the pressure reducing valve, based on the Hilber-Hughes Taylor implicit integration algorithm with second-order accuracy, which focuses on comparing the maximum axial force of the U-shaped ring and connecting screw in the two fixed connection structures under the impact environment, and further analyzes the mechanical mechanism of the difference in the axial force of the connection structure under the impact environment, by studing the pressure change of the connection structure on the PRV. The results were obtained: the fixed connection structure needs to have a continuous pre-tightening force during the impact process to ensure that the connection structure does not generate a stepwise increase in axial force during the process impact, the material yield ofconnecting parts(U-rings, screws), which will cause the remaining pre-tightening force of the connecting parts to decrease.Finally, a sufficient condition that the fixed connection structure can safely withstand multiple shocks was given, that is, the fixed connection does not yield material during the impact.
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备注/Memo
收稿日期:2022-03-14 修回日期:2022-05-04
基金项目:装发基础研究项目群(514010106-302)
作者简介:薛杰(1983—),男,硕士,高级工程师,研究领域为结构振动、冲击与强度。
更新日期/Last Update:
1900-01-01