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A strategy for lightweight designing of a railway vehicle car body including composite material and dynamic structural optimization 被引量:2
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作者 Alessio Cascino Enrico Meli Andrea Rindi 《Railway Engineering Science》 2023年第4期340-350,共11页
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 mat... 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. 展开更多
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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NUMERICAL ANALYSIS OF NONLINEAR STABILITY FOR RAILWAY PASSENGER CARS 被引量:8
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作者 Zeng Jing National Traction Power Laboratory, Southwest Jiaotong University 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2001年第2期97-101,共5页
The Newton Raphson iteration and QR algorithm are combined to search the Hpf bifurcation point of the vehicle running on straight track and on large radius curved tracks. Limit cycles that are bifurcated from the equ... The Newton Raphson iteration and QR algorithm are combined to search the Hpf bifurcation point of the vehicle running on straight track and on large radius curved tracks. Limit cycles that are bifurcated from the equilibrium points and the saddle node bifurcation point are computed through employing a variable step Runge Kutta method and the Poincaré map. Finally, numerical simulations are carried out for the stability of a high speed passenger car operating on straight and large radius curved tracks. The influences of the radius of curvature and the superelevation of the track on the stability of the vehicle system are investigated. 展开更多
关键词 railway passenger car STABILITY BIFURCATION Limit cycle Critical speed
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Kinematic and Kinetic Analysis for the Tilting Mechanism of Railway Passenger Cars
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作者 邬平波 曾京 刘宏友 《Journal of Modern Transportation》 2000年第1期92-98,共7页
The kinematics and kinetics of the tilting mechanism of railway passenger cars are studied. The parameters of the mechanism are given. The motions of the actuator, the center of gravity of the carbody and the center o... The kinematics and kinetics of the tilting mechanism of railway passenger cars are studied. The parameters of the mechanism are given. The motions of the actuator, the center of gravity of the carbody and the center of coupler are calculated. Finally, the maximum driving force, output power and velocity of the actuator are discussed in detail. 展开更多
关键词 KINEMATICS KINETICS tilting mechanism railway passenger car
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