梁式管接头结构的稳健性优化设计  

Structural robust optimization design of beam seal

作　　者：刘勇[1] 任新江 闫方超 LIU Yong;REN Xinjiang;YAN Fangchao(College of Aeronautical Engineering,Civil Aviation University of China,Tianjin 300300,China;Tianjin Bool Technology Company Limited,Tianjin 300392,China)

机构地区：[1]中国民航大学航空工程学院,天津300300 [2]天津布尔科技有限公司,天津300392

出　　处：《航空动力学报》2024年第10期40-49,共10页Journal of Aerospace Power

基　　金：天津市教委科研计划项目(2020KJ017)。

摘　　要：为了提高梁式管接头的密封性能,以梁式管接头的结构参数为设计变量,对其进行稳健性优化设计。首先建立了带有椭圆弧凹槽的梁式管接头的有限元模型;其次分别以密封接触表面两道密封的最大接触压力和接触面宽为密封性能的定量指标,建立2阶响应面模型,利用遗传算法对响应面模型进行多目标优化求解;最后在多目标优化模型上增加表征目标函数稳健性的灵敏度附加项,求解得到了梁式管接头稳健的设计参数组合,并通过有限元数值模拟验证了稳健性优化结果的有效性。结果表明:当椭圆长半轴为1.156 mm、椭圆短半轴为0.315 mm、第1道密封名义宽度为0.429 mm时,梁式管接头的密封稳健性更好,稳健性设计达到预期目标。In order to improve the sealing performance of the beam seal,the structural parameters of the beam seal were used as design variables,and the robust optimization design was carried out.A finite element model of the beam seal with elliptical arc groove was established.Taking the maximum contact pressure and contact surface width of these two seals on the sealing contact surface as quantitative indicators of sealing performance,second-order response surface models were established,and the response surface models were solved by multi-objective optimization using genetic algorithm.The additional sensitivity term representing the robustness of the objective function was added to the multiobjective optimization model,and the robust design parameters combination of the beam seal was obtained.The effectiveness of the robust optimization results was verified by the finite element’s numerical simulation.The results showed that when the elliptic semi-major axis was 1.156 mm,the elliptic semi-minor axis was 0.315 mm,and the nominal width of the first seal was 0.429 mm,the sealing robustness of the beam seal was better,and the robust design achieved the expected goal.

关 键 词：梁式管接头 响应面模型 遗传算法 多目标优化 稳健性设计 

分 类 号：V232.7[航空宇航科学与技术—航空宇航推进理论与工程]