航天推进技术研究院主办
[1]石波,杨广杰,魏建国,等.等离子发动机安装结构拓扑优化设计[J].火箭推进,2023,49(04):43-50.
SHI Bo,YANG Guangjie,WEI Jianguo,et al.Topology optimization design of mounting structure for plasma engine[J].Journal of Rocket Propulsion,2023,49(04):43-50.
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SHI Bo,YANG Guangjie,WEI Jianguo,et al.Topology optimization design of mounting structure for plasma engine[J].Journal of Rocket Propulsion,2023,49(04):43-50.
等离子发动机安装结构拓扑优化设计
《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]
卷:
49
期数:
2023年04期
页码:
43-50
栏目:
目次
出版日期:
2023-08-25
- Title:
- Topology optimization design of mounting structure for plasma engine
- 文章编号:
- 1672-9374(2023)04-0043-08
- 分类号:
- V439+.2
- 文献标志码:
- A
- 摘要:
- 针对等离子体发动机安装结构,研究了静力学和动力学条件约束下结构拓扑优化的设计思路和方法。首先,通过模态仿真分析原结构存在的缺点,寻找结构改进方向; 然后,应用拓扑优化设计方法得到满足设计要求的最佳结构构型; 最后,充分考虑结构装配工艺性要求,采用拓扑优化和尺寸优化相结合的方法得到实用的工程最优方案。对比原结构方案,优化方案质量减轻10.8%。在静承载方面,优化结构最大位移减少61.1%,支撑刚度大幅增强; 最大应力减少1.4%,结构上的应力分布更加均匀,平均应力降低。在动承载方面,优化结构上下偏摆和左右偏摆的振动模态明显改善,结构1～6阶振动频率提升了5%～39.8%; 优化结构在随机振动载荷下的RMS应力值和损伤降低,疲劳寿命显著提升。优化后结构的性能提升验证了设计方法的正确性和有效性。
- Abstract:
- For the mounting structure of plasma engine, the design idea and method of structural topology optimization under the constraints of static and dynamic conditions are studied. Firstly, the defects of the original structure are analyzed by modal simulation to find the direction of structural improvement. Next, the topology optimization design is applied to obtain the optimal configuration that meets the design requirements. Finally, considering the technological requirements of structural assembly, the practical engineering optimal scheme is obtained by combining topology optimization and size optimization. Compared with the original structure, the mass of the optimized structure is reduced by 10.8%. In terms of static bearing capacity, the maximum displacement of the optimized structure is reduced by 61.1%, and the support stiffness is greatly enhanced. The maximum stress of the structure is reduced by 1.4%, the stress distribution is more uniform, and the average stress is reduced. In terms of dynamic bearing capacity, the vibration modes of the optimized structure with up-down and left-right yaw are significantly improved, and the corresponding frequencies of the 1st to 6th order vibration modes are increased by 5% to 39.8%. The RMS stress value and damage of the optimized structure under random vibration load are reduced, and the fatigue life is significantly improved. The correctness and effectiveness of the design method are verified with the performance improvement of the optimized structure.
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备注/Memo
收稿日期:2022-10-12; 修回日期:2022-11-01
基金项目:国家重点研发计划(2019YFC1907000)
作者简介:石波(1980—),男,硕士,研究员,研究领域为发动机总体设计。
更新日期/Last Update:
1900-01-01