航天推进技术研究院主办
[1]杜大华,穆朋刚,田川,等.液体火箭发动机管路断裂失效分析及动力优化[J].火箭推进,2018,44(03):16-22.
DU Dahua,MU Penggang,et al.Failure analysis and dynamics optimization of pipeline for liquid rocket engine[J].Journal of Rocket Propulsion,2018,44(03):16-22.
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DU Dahua,MU Penggang,et al.Failure analysis and dynamics optimization of pipeline for liquid rocket engine[J].Journal of Rocket Propulsion,2018,44(03):16-22.
液体火箭发动机管路断裂失效分析及动力优化
《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]
卷:
44
期数:
2018年03期
页码:
16-22
栏目:
研究与设计
出版日期:
2018-06-30
- Title:
- Failure analysis and dynamics optimization of pipeline for liquid rocket engine
- 文章编号:
- 1672-9374(2018)03-0016-07
- 分类号:
- V434.2-34
- 文献标志码:
- A
- 摘要:
- 液体火箭发动机管路系统的安全性与可靠性已成为发动机能否安全工作的关键。针对某型火箭发动机管路断裂失效的问题,提出了管路的动强度失效分析方法与动力优化设计技术。通过机理分析与故障复现,提出了管路振动控制措施; 以故障管路考核部位接头的前后倒角为设计变量,以倒角位置最低动应力为目标函数,采用结构频率禁区约束,进行动力学优化模型设计与基于形状优化的动强度优化设计; 开展接头结构在基础激励下的随机振动疲劳损伤定量分析,改进方案最终通过了疲劳试验验证。结果表明,通过对管路结构的动力学优化,提升了管路结构的力学环境适应性与可靠性,验证了改进措施的有效性; 所建立的结构失效分析、动力优化设计方法可为型号研制工作提供技术支撑。
- Abstract:
- The safety and reliability of pipeline system for liquid rocket engine are the key issues to safe operation of engine. Aiming at the fracture failure of rocket engine pipeline, a newfailure analysis method and dynamic optimization design of the pipeline are proposed. Firstly, the vibration control measures were put forward based on the mechanism analysis and fault recurrence. Then the front and rear chamfers of the failure pipe joint were treated as design variables, while the minimum dynamic stress at the two chamfers was served as the objective function. The dynamics optimization model design and dynamic strength optimization design based on shape optimization were conducted by using the structure frequency restricted zone as a constraint. Lastly, the damage quantitative analysis of random vibration fatigue of the structure under base-excitation was carried out for the joint structure. In addition, the improved approach was validated by fatigue test. It is concluded from the research that the dynamics optimization of pipeline structure can improve the mechanical environment adaptability and structuralrelia bility, and the effectiveness of improvement measures is verified. The established methods of structural failure analysis and dynamics optimization design provide technical support for the project development.
参考文献/References:
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备注/Memo
收稿日期:2017-09-27
基金项目:国家自然科学基金青年基金(11702204); 装备预研共用技术和应用基础(2017ZZB·YY4001Da)
作者简介:杜大华(1977—),男,高级工程师,博士,研究领域为结构强度、振动与可靠性
更新日期/Last Update:
2018-06-30