航空学报 > 2024, Vol. 45 Issue (11): 529021-529021   doi: 10.7527/S1000-6893.2023.29021

发动机外涵道机匣加筋布局轻量化设计

孟亮1,2,3, 张靖1,2, 王亚栋1,2, 于洋4, 张帆4, 朱继宏1,2,3, 张卫红1,2,3()   

  1. 1.陕西省空天结构技术重点实验室,西安 710072
    2.西北工业大学 机电学院,西安 710072
    3.西北工业大学 航宇材料一体化设计与增材制造装备技术国际联合研究中心,西安 710072
    4.北京动力机械研究所,北京 100074
  • 收稿日期:2023-05-19 修回日期:2023-06-14 接受日期:2023-07-05 出版日期:2023-10-11 发布日期:2023-10-08
  • 通讯作者: 张卫红 E-mail:zhangwh@nwpu.edu.cn
  • 基金资助:
    国家重点研发计划(2022YFB4603101);国家自然科学基金(12111530244);中央高校基本科研业务费专项资金(D5000230049)

Lightweight design of stiffening ribs layout of a bypass engine casing

Liang MENG1,2,3, Jing ZHANG1,2, Yadong WANG1,2, Yang YU4, Fan ZHANG4, Jihong ZHU1,2,3, Weihong ZHANG1,2,3()   

  1. 1.Shaanxi Key Laboratory of Aerospace Structures,Xi’an 710072,China
    2.School of Mechanical Engineering,Northwestern Polytechnical University,Xi’an 710072,China
    3.State IJR Center of Aerospace Design and Additive Manufacturing,Northwestern Polytechnical University,Xi’an 710072,China
    4.Beijing Institute of Power Machinery,Beijing 100074,China
  • Received:2023-05-19 Revised:2023-06-14 Accepted:2023-07-05 Online:2023-10-11 Published:2023-10-08
  • Contact: Weihong ZHANG E-mail:zhangwh@nwpu.edu.cn
  • Supported by:
    National Key Research and Development Program of China(2022YFB4603101);National Natural Science Foundation of China(12111530244);The Fundamental Research Funds for the Central Universities(D5000230049)

摘要:

针对某型发动机外涵道机匣的极致轻量化设计需求,首先以结构刚度最大化为目标,开展了薄壁机匣结构复杂工况下的加筋布局拓扑优化设计;进一步考虑机匣服役工况下的屈曲稳定性要求,系统性研究了工程常见4种加筋构型与结构抗屈曲性能的关联关系;最后,考虑制造工艺约束,建立了外涵道机匣的周期性加筋参数化模型,综合结构刚度、强度和稳定性要求,构建了基于加筋应力水平和结构抗屈曲性能等的综合优化设计目标,并开展了加筋尺寸优化设计。优化得到的外涵道机匣加筋设计方案较原始设计模型减重近40%,与1.3 mm等厚机匣相比,不仅满足结构刚度与强度设计要求,同时实现了结构外部压强临界屈曲载荷212.9%的提升,有效保障了发动机机匣严酷载荷工况下的服役稳定性。

关键词: 外涵道机匣, 屈曲, 加筋设计, 参数化建模, 结构优化

Abstract:

This study focuses on the lightweight design of a specific bypass engine casing,considering the complex effects. A topology optimization approach is first employed to determine the optimal layout of stiffening ribs under various loading conditions. Additionally,taking into account the buckling stability requirements for the casing,the correlation between four common reinforcement configurations and structural buckling resistance is systematically studied. A hierarchical stiffening strategy on the basis of triangle and hexagonal patterns is proposed,and built a parametric model for the periodically stiffened casing. A comprehensive optimization design objective,based on stress levels of stiffening ribs and structural buckling resistance,is finally developed. The optimized reinforcement design for the bypass engine casing achieves a weight reduction of approximately 40% compared to the original design model. Moreover,it surpasses the structural stiffness and strength requirements and exhibits a significant enhancement of 212.9% in the critical buckling load when compared to a structure with a wall thickness of 1.3 mm. These advancements effectively ensure the operational stability of the bypass engine casing under severe load conditions.

Key words: bypass engine casing, buckling, reinforcement design, parametric modeling, structure optimization

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