1506 レール温度座屈時の変形局所化に関する研究(軌道構造,SS2:メンテナンス,コストダウン,第18回交通・物流部門大会(TRANSLOG2009))

概要

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The localization in the buckling of infinite rail due to temperature stress is studied. A tangent rail is modeled by a straight Bernoulli-Euler beam cramped by sleepers. The buckling load is derived theoretically for each wavenumber. The bifurcation path is also analyzed under periodic deformation. On that path, instability analysis is achieved for deformation rates with wavenumbers around the buckling point. From these results, a bifurcation set embedded in the space spanned by wavenumber, amplitude and temperature is developed. It is found that deformation modes corresponding to the all wavenumbers in the neighborhood of buckling point contribute to the growth of the localization in the rail deflection.
一般社団法人日本機械学会の論文
2009-12-02