列車-曲線橋梁系統(tǒng)耦合振動(dòng)分析
[Abstract]:In order to further study the coupled vibration characteristics of train-curve bridge system, based on the dynamic interaction analysis theory of vehicle-bridge / track system, the spatial coupling vibration equation of train-curve bridge system is established by modal superposition method. The moving coordinate system is established along the centerline of the track, and the geometric position relation of the train passing through the curved bridge is determined by means of coordinate transformation, considering the characteristics of the train curve motion, the Hertz elastic contact theory and the Karke (Kalker) creep-slip theory are considered. The wheel-rail contact coupling relation is solved and the generalized force vector is modified. The Runge-Kutta integration method is used to solve the dynamic response of the train-curve bridge. Based on the above theory, the influence of curvature radius, curve superelevation and speed on the coupled vibration response of train-curve bridge is studied. The results show that the vibration response of the bridge and train increases with the increase of the speed and decreases with the increase of the radius of the curve. The vibration response of the bridge does not change with the increase of the curve superelevation, but the vibration response of the train is smaller when the equilibrium is super high and the train is too high.
【作者單位】: 同濟(jì)大學(xué)橋梁工程系;上海工程技術(shù)大學(xué)軌道交通學(xué)院;
【基金】:國家自然科學(xué)基金資助項(xiàng)目(50908178) 高等學(xué)校博士學(xué)科點(diǎn)專項(xiàng)科研基金資助項(xiàng)目(20090072110044)
【分類號(hào)】:U441.3
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