title: Multi-Objective Aerodynamic Optimization of the Streamlined Shape of High-Speed Trains Based on the Kriging Model.
abstract: Minimizing the aerodynamic drag and the lift of the train coach remains a key issue for high-speed trains. With the development of computing technology and computational fluid dynamics (CFD) in the engineering field, CFD has been successfully applied to the design process of high-speed trains. However, developing a new streamlined shape for high-speed trains with excellent aerodynamic performance requires huge computational costs. Furthermore, relationships between multiple design variables and the aerodynamic loads are seldom obtained. In the present study, the Kriging surrogate model is used to perform a multi-objective optimization of the streamlined shape of high-speed trains, where the drag and the lift of the train coach are the optimization objectives. To improve the prediction accuracy of the Kriging model, the cross-validation method is used to construct the optimal Kriging model. The optimization results show that the two objectives are efficiently optimized, indicating that the optimization strategy used in the present study can greatly improve the optimization efficiency and meet the engineering requirements.
authors.affiliation: Key Laboratory of Rail Traffic Safety of Ministry of Education; School of Traffic and Transportation Engineering, Central South University, Changsha, Hunan,China.|CSR Qingdao Sifang Co. Ltd., Qingdao, China.
authors.forename: Gang
authors.initials: G
authors.lastname: Xu
authors.affiliation: Key Laboratory of Rail Traffic Safety of Ministry of Education; School of Traffic and Transportation Engineering, Central South University, Changsha, Hunan,China.
authors.forename: Xifeng
authors.initials: X
authors.lastname: Liang
authors.affiliation: CSR Qingdao Sifang Co. Ltd., Qingdao, China.
authors.forename: Shuanbao
authors.initials: S
authors.lastname: Yao
authors.affiliation: CSR Qingdao Sifang Co. Ltd., Qingdao, China.
authors.forename: Dawei
authors.initials: D
authors.lastname: Chen
authors.affiliation: Key Laboratory of Rail Traffic Safety of Ministry of Education; School of Traffic and Transportation Engineering, Central South University, Changsha, Hunan,China.
authors.forename: Zhiwei
authors.identifier: http://orcid.org/0000-0002-3443-7353
authors.initials: Z
authors.lastname: Li
mesh_terms: D000465:Algorithms; D004738:Engineering; D057446:Hydrodynamics; D008962:Models, Theoretical; D009624:Noise, Transportation; D062206:Spatial Analysis; D014186:Transportation