A strategy for lightweight designing of a railway vehicle car body including composite material and dynamic structural optimization

作     者：Alessio Cascino Enrico Meli Andrea Rindi Alessio Cascino;Enrico Meli;Andrea Rindi

作者机构：Department of Industrial EngineeringUniversity of FlorenceVia Santa Marta3Florence50139 FlorenceItaly 

出 版 物：《Railway Engineering Science》 (铁道工程科学（英文版）)

年 卷 期：2023年第31卷第4期

页      面：340-350页

核心收录：

学科分类：08[工学] 080204[工学-车辆工程] 0802[工学-机械工程] 0823[工学-交通运输工程] 

主　　题：Structural dynamic optimization Car body lightweight design Railway vehicle dynamics Railway car body engineering Railway vehicle design Composite materials 

摘      要：Rolling stock manufacturers are finding structural solutions to reduce power required by the vehicles,and the lightweight design of the car body represents a possible solution.Optimization processes and innovative materials can be combined in order to achieve this goal.In this framework,we propose the redesign and optimization process of the car body roof for a light rail vehicle,introducing a sandwich structure.Bonded joint was used as a fastening system.The project was carried out on a single car of a modern tram platform.This preliminary numerical work was developed in two main steps:redesign of the car body structure and optimization of the innovated system.Objective of the process was the mass reduction of the whole metallic structure,while the constraint condition was imposed on the first frequency of vibration of the system.The effect of introducing a sandwich panel within the roof assembly was evaluated,focusing on the mechanical and dynamic performances of the whole car body.A mass saving of 63%on the optimized components was achieved,corresponding to a 7.6%if compared to the complete car body shell.In addition,a positive increasing of 17.7%on the first frequency of vibration was observed.Encouraging results have been achieved in terms of weight reduction and mechanical behaviour of the innovated car body.