Whole-process design and experimental validation of landing gear lower drag stay with global/local linked driven optimization strategy

作     者：Chengwei FEI Haotian LIU Zhengzheng ZHU Liqiang AN Shaolin LI Cheng LU Chengwei FEI;Haotian LIU;Zhengzheng ZHU;Liqiang AN;Shaolin LI;Cheng LU

作者机构：Department of Aeronautics and AstronauticsFudcm UniversityShanghai 200433China School of AeronauticsNorthwestern Polytechnical UniversityXi'an 710072Xi'anChina Department of Mechanical EngineeringNorth China Electric Power UniversityBaoding 071003China School of Energy and Power EngineeringBeihang UniversityBeijing 100083China Beijing Key Laboratory of Aero-Engine Structure and StrengthBeijing 100083China 

基　　金：co-supported by National Natural Science Foundation of China (Nos. 51975124 and 51675179) Aerospace Science and Technology Fund of China (No.AERO201937) Research Start-up Funding of Fudan University (No. FDU38341) 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2021年第34卷第2期

页      码：318-328页

摘      要：Landing gear lower drag stay is a key component which connects fuselage and landing gear and directly effects the safety and performance of aircraft takeoff and landing. To effectively design the lower drag stay and reduce the weight of landing gear, Global/local Linked Driven Optimization Strategy(GLDOS) was developed to conduct the overall process design of lower drag stay in respect of optimization thought. The whole-process optimization involves two stages of structural conceptual design and detailed design. In the structural conceptual design, the landing gear lower drag stay was globally topologically optimized by adopting multiple starting points algorithm. In the detailed design, the local size and shape of landing gear lower drag stay were globally optimized by the gradient optimization strategy. The GLDOS method adopts different optimization strategies for different optimization stages to acquire the optimum design effect. Through the experimental validation, the weight of the optimized lower dray stay with the developed GLDOS is reduced by 16.79% while keeping enough strength and stiffness, which satisfies the requirements of engineering design under the typical loading conditions. The proposed GLDOS is validated to be accurate and efficient in optimization scheme and design cycles. The efforts of this paper provide a whole-process optimization approach regarding different optimization technologies in different design phases, which is significant in reducing structural weight and enhance design tp wid 1 precision for complex structures in aircrafts.

主 题 词：Global/local linked driven optimization Landing gear Lower drag stay Optimization Whole-process design 

学科分类：08[工学] 082501[082501] 0825[工学-环境科学与工程类] 

核心收录：

D　O　I：10.1016/j.cja.2020.07.035

馆 藏 号：203994622...