Holistic Topology-parameter Optimization Method for the Rail Vehicle End Structure
Authors: Liu, F., Tang, Z. and Zhang, J.
Journal: Jixie Gongcheng Xuebao/Journal of Mechanical Engineering
Volume: 56
Issue: 20
Pages: 134-145
ISSN: 0577-6686
DOI: 10.3901/JME.2020.20.134
Abstract:The topology optimization method is widely used to obtain the optimized geometry shape of a structure; the parameter optimization method is generally used to determine the optimal value of a parameter. In order to integrate the advantages of two methods, a holistic topology-parameter optimization method for the end structure of vehicles is proposed, which can consider both static and dynamic loads and is meanwhile suitable for large-scale structures. The scaled energy weighting based Hybrid Cellular Automata(HCA) method is used to perform the topology optimization for comprehensive crashworthiness and stiffness assessments of end structure, which can effectively solve the result deviation caused by the energy difference in multi-working conditions; the grid deformation technology and the adaptive simulated annealing optimization algorithm are combined to optimize the parameters of the structure under the given contact force constraints. With the application of this method to the optimization of end structure of a vehicle, the critical peak contact force drops by 26.2%-46.3% in the frontal collision, meanwhile the deformation is more reasonable; the upper and lower safety distance of the passenger living space increases by 24.8% and 12.8% in the rollover collision, respectively.
Source: Scopus