Abstract
An analytical method to treat flexural vibration of railway vehicle carbody is investigated. From several measurement results for actual railway vehicles, it has been found that the relative vertical displacement between roof and floor couples strongly with lateral deformation of side panels. An analytical model, therefore, has to express such coupling effect correctly. A curved beam, in which circumferential and radial deformation couples each other, is introduced to express the deformation of side pillar in this study. The strain energy of the curved beam is derived based on a shell theory, and some numerical calculations are carried out. A straight and curved beam coupled system is proposed as a reduced system representing side panel of a railway vehicle carbody. Numerical result shows that the beam system can express the coupling effect between roof-floor relative vertical displacement and side panel lateral deformation successfully.
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