Multi-objective optimization of a high-speed train head based on the FFD method

2016 ◽  
Vol 152 ◽  
pp. 41-49 ◽  
Author(s):  
Rui Li ◽  
Ping Xu ◽  
Yong Peng ◽  
Peng Ji
Keyword(s):  
High Speed ◽  
Multi Objective Optimization ◽  
High Speed Train ◽  
Multi Objective

Multi-Objective Optimization for the Section Structure of Sandwich Plate Applied in the High-Speed Train Compartments

2014 ◽  
Vol 597 ◽  
pp. 535-539
Author(s):  
Yi Qing Wang ◽  
Xu Chen ◽  
Bin Wang ◽  
Xin Bin Kuang ◽  
Xiao Geng Tian
Keyword(s):  
High Speed ◽  
Optimization Design ◽  
Sandwich Plate ◽  
Side Wall ◽  
Response Surfaces ◽  
Solution Set ◽  
Multi Objective Optimization ◽  
High Speed Train ◽  
Pareto Solution ◽  
Multi Objective

In order to obtain the side walls section structures of high speed train applicable to different running speeds and conditions, a multi-objective optimization design is made based on the structure of topology optimization. In this optimization formulation, the weight of sandwich plate, static compliance and maximum deformation are used as the objective functions; the thickness of face panels and cores in five parts of the side wall are variables; and the air pressure gradient in compartments is the constraint function. Surrogate model techniques are adopted for constructing the response surfaces based on the optimization. Finally, a multi-objective optimization is performed using the NSGA-II algorithm and the optimization generates a Pareto solution set. The structure performance in Pareto set is greatly improved by 8.21% -33.58% than that of topology structure. In addition, the Pareto solution set provides engineers with many alternative Pareto-optimal solutions for optimization design of the sandwich plate section applied in the high-speed train.

MDO of Anti-Creeper on High Speed Train Using Optimus

2011 ◽  
Vol 130-134 ◽  
pp. 3128-3132
Author(s):  
Kai Jie Liu ◽  
Hong Lun Zhao ◽  
Chao Xu
Keyword(s):  
High Speed ◽  
Optimization Design ◽  
Feasible Solution ◽  
Minimum Mass ◽  
Multi Objective Optimization ◽  
High Speed Train ◽  
Optimization Analysis ◽  
Pareto Solution ◽  
Optimization Software ◽  
Multi Objective

How to find the solution of multi-objective optimization quickly and exactly is the challenge of multi-objective optimization design. This paper explores the feasibility of multi-objective optimization solution briefly in theory, and makes a high-speed train’s anti-creeper as an example which using multi-objective design optimization software to find the feasible solution. Nastran and LS-Dyna are respectively adopted to solve the linear static and collision study analysis of the anti-creeper. In this paper Nastran and LS-Dyna are integrated on Optimus which is MDO platform to make a MDO of anti-creeper. The anti-creeper optimization analysis is proceeded based on many indexes satisfied, and its multi-objective Pareto solution of its minimum mass and biggest internal energy comes out. The method of multi-objective optimization solution in this paper is solved well in MDO.

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