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Multi-objective aerodynamic optimization of high-speed train heads based on the PDE parametric modeling by Shuangbu Wang; Ruibin Wang; Yu Xia; Zhenye Sun; Lihua You; Jianjun Zhang is a Engineering article available to read on EtoBox.

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## Abstract With the increasing running speed, the aerodynamic issues of high-speed trains are being raised and impact the running stability and energy efficiency. The optimization design of the head shape is significantly important in improving the aerodynamic performance of high-speed trains. Existing aerodynamic optimization methods are limited by the parametric modeling methods of train heads which are unable to accurately and completely parameterize both global shapes and local details. Due to this reason, they cannot optimize both global and local shapes of train heads. In order to tackle this problem, we propose a novel multi-objective aerodynamic optimization method of high-speed train heads based on the partial differential equation (PDE) parametric modeling. With this method, the half of a train head is parameterized with 17 PDE surface patches which describe global shapes and local details and keep the surface smooth. We take the aerodynamic drag and lift as optimization objectives; divide the optimization design process into two stages: global optimization and local optimization; and develop global and local optimization methods, respectively. In the first stage, the no

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Author

Shuangbu Wang; Ruibin Wang; Yu Xia; Zhenye Sun; Lihua You; Jianjun Zhang

Publisher

Springer Science and Business Media LLC

Published

2021

Language

EN

Field

Engineering (Physical Sciences)