发动机机匣弧面不规则管路的布局参数多目标优化设计
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国家自然科学基金(51875460); 航空基金(2018ZB53016); 西北工业大学研究生种子基金(CX2020113)


Multi-objective optimization design of layouts parameters for irregular pipeline on engine case
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    摘要:

    管路布局优化是降低发动机管路振动应力的重要手段,提出了一种发动机机匣弧面上不规则管路布局参数的多目标优化设计方法。从发动机机匣弧面的U形管路出发,建立了具有复杂布局走向的不规则单管路的参数化建模方法。分析了布局参数对管路的危险固有频率、多点激励响应的灵敏度。综合考虑错频和最大响应等多个目标,采用多目标遗传优化算法,对不规则管路的布局参数实施了优化设计。结果表明:管形布局优化设计效果显著,错开了两个危险固有频率禁带;管路结构在相同激励下最大位移幅值下降约35%,最大应力幅值下降近50%,为发动机管路的振动控制和动力学正向设计提供了参考。

    Abstract:

    Optimization design of pipeline layout is an important means to reduce the vibration stress of engine pipeline. The multi-objective optimization design process and method for the layout parameters of the irregular pipeline were proposed. Based on the U-shaped pipeline with curved surface of engine case, a parameterized modeling method of an irregular pipeline with complex layout was established. The sensitivities of layout parameters to the dangerous natural frequencies and multi-point excitation response of the pipeline, such as the resonance frequencies, the maximum displacement and stress amplitude under multi-point excitation, were analyzed. In view of the constraints of multi-frequency and vibration responses, the method of multi-objective genetic algorithm was adopted to realize the optimal design of layout parameters of irregular pipeline. The results showed that the optimization of layouts was effective, two forbidden bands of dangerous natural frequencies were staggered. Under the same excitation, the maximum displacement amplitude of pipeline structure decreased about 35%, and the maximum stress amplitude decreased nearly 50%. It can provide a reference for the vibration controlling and dynamic forward design system of engine pipeline.

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刘伟,朱宏彦,赵玉杰,岳珠峰.发动机机匣弧面不规则管路的布局参数多目标优化设计[J].航空动力学报,2021,36(1):148~156. LIU Wei, ZHU Hongyan, ZHAO Yujie, YUE Zhufeng. Multi-objective optimization design of layouts parameters for irregular pipeline on engine case[J]. Journal Of Aerospace Power,2021,36(1):148-156.

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  • 收稿日期:2020-06-25
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  • 在线发布日期: 2021-02-04
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