以某铁路斜拉板桥方案为例，探讨斜拉板桥的动力分析模型。文中将由普通钢筋混凝土板和斜拉索构成的斜拉板用格栅单元和空间杆单元模拟，并假定两类单元之间变形协调；主梁、桥塔和桥墩均离散为空间梁单元，且在主梁与桥塔之间以及主梁与斜拉板之间设置刚臂单元，从而建立了斜拉板桥的全桥分析模型。在此基础上分析了方案桥的动力特性，所得结果可供设计参考。 Taking a cable stayed bridge project as an example, the dynamic analysis model of the cable stayed bridge is discussed. In this paper, the inclined plate composed of ordinary reinforced concrete slab and stay cable is simulated by grid element and space rod element, and the deformation coordination between the two types of elements is assumed. The main girder, bridge tower and bridge piers are all discrete as space beam elements In the main beam and the pylon and between the main beam and the diagonal pull plate arm unit set up, thus establishing a full-bridge analysis of the cable-stayed bridge model. Based on this, the dynamic characteristics of the scheme bridge are analyzed, and the results are available for design reference.