A three-dimensional analytical model and parameter determination method of the elastic vibration of a railway vehicle carbody

• Published in: Vehicle system dynamics Vol. 58; no. 4; pp. 545 - 568
• Main Authors: Akiyama, Yuki, Tomioka, Takahiro, Takigami, Tadao, Aida, Ken-ichiro, Kamada, Takayoshi
• Format: Journal Article
• Language: English
• Published: Abingdon Taylor & Francis 02.04.2020; Taylor & Francis Ltd
• Subjects: analytical model; carbody; continuous system; Elastic anisotropy; Elastic bodies; elastic vibration; Finite element method; Mathematical models; parameter determination; Parameters; Particle swarm optimization; Passenger comfort; Railway vehicle; Resonant frequencies; Test vehicles; Three dimensional analysis; Three dimensional models; Vibration mode
• DOI: 10.1080/00423114.2019.1590606
• ISSN: 0042-3114

Reducing railway vehicles' three-dimensional (3D) elastic vibration is needed to improve passenger comfort. This paper presents a 3D analytical model and parameter determination method for the elastic vibration of a carbody. The carbody is modelled as a simple box-type structure consisting of an anisotropic 3D elastic body treated as a continuous system. This model can express complicated 3D elastic vibration (such as lateral-vertical coupled vibration) with fewer degrees of freedom and at a lower computational cost than the detailed finite element model. A model parameter determination method using particle swarm optimisation was also proposed. Application to a Shinkansen-type test vehicle showed good agreement between measured and calculated results with a maximum natural frequency differences of the targeted six elastic vibration modes within 0.86%, indicating the effectiveness of the proposed model and parameter determination method.