高速动车组受电弓导流罩多学科优化设计

Optimum Multidisciplinary Design of the Pantograph Flow Guide Mantle for High-speed EMUs

受电弓导流罩是改善高速动车组气动性能的重要部件。为降低高速动车组受电弓导流罩区域的气动阻力,基于DOE(实验设计)方法对优化空间均匀采样,进行了涉及气动性能、结构强度等性能指标的多学科优化设计;然后借助NCGA(多目标优化遗传算法)建立近似模型,寻求气动阻力、结构强度综合性能最佳的导流罩结构。结果表明,最佳受电弓导流罩方案的整车气动阻力比初始方案降低5%,同时压力、变形满足设计要求。

Pantograph flow guide mantle （shroud） is an important component which improves the aerodynamic performance of high-speed EMU. In order to reduce the aerodynamic resist- ancc of pantograph shroud, the optimization space is uniformly sampled based on the DOE methods, an optimum multidisciplinary design is performed, involving indexes like aerodynamic performance and structural strength. Then, an approximate model is established with the multi-objective optimization method NCGA, in order to find the best shroud structure with better comprehensive performance of both aerodynamic drag and structural strength. The experiment and research results show that aerodynamic drag of an improved pantograph shroud structure could be reduced by 2% compared to the initial structure, the pressure and deformation could also meet the design requirements.