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

引用

Railway Engineering Science 2023年第4期31卷 340-350页

作者： alessio cascino Enrico Meli Andrea Rindi Department of Industrial Engineering University of FlorenceVia Santa Marta3Florence50139 FlorenceItaly

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 *** processes and innovative materials can be combined in order to achieve this *** this framework,we propose the redesign and optimization process of the car body roof for a light rail vehicle,introducing a sandwich *** joint was used as a fastening *** project was carried out on a single car of a modern tram *** preliminary numerical work was developed in two main steps:redesign of the car body structure and optimization of the innovated *** 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 *** 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 *** addition,a positive increasing of 17.7%on the first frequency of vibration was *** results have been achieved in terms of weight reduction and mechanical behaviour of the innovated car body.

关键词： Structural dynamic optimization Car body lightweight design Railway vehicle dynamics Railway car body engineering Railway vehicle design Composite materials

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