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为了了解板桁组合钢桥的动力性能,本文用有限元法对板桁桥的自振特性及机车过桥时动轮的锤击作用的动力响应进行了空间计算,并将计算结果与普通桁架桥的计算值作对比,以揭示板桁桥的动力性能。在计算移动的激振荷载下的桥梁结构的动力响应时,本文采用了由作者提出的“双走长”法与振型迭加法相结合的数值计算方法,获得精度高、速度快的良好效果。
In order to understand the dynamic performance of the panel girder composite steel bridge, this paper uses the finite element method to calculate the dynamic response of the girder bridge girder’s self-vibration and the dynamic response of the locomotive when it passes through the bridge, and compares the calculated results with the ordinary truss bridge Comparison of calculated values to reveal the dynamic performance of slab bridge. In the calculation of the dynamic response of the bridge structure under the moving excitation load, this paper adopts the numerical calculation method combined with “double walking” method and modal superposition method proposed by the author, and obtains the good effect of high precision and fast speed .