The software ansys6 . 0 is used to analysis the stability of the state after construction of tongwamen bridge , linear method is used in analyzing the finite element model of the bridge , the coeffient of stability of different state after construction is given . on the basis , the effect of different factors such as the arrangement of lateral brace , the sloping angle of arch ribs , the stiffness of bridge deck system , the effect of non - orientedly conservative loadings of the hanger and tie bar etc is discussed . the different coefficients of stability of changing these factors are given , so the factors that are vital to the lateral stability of x - type arches are found , and the rationality of the methods taken to enhance the lateral stability of tongwamen bridge is evaluated 本文应用有限元分析商业软件ansys6 . 0 ，采用线弹性方法，通过对该桥的空间有限元模型进行稳定性分析，得出其成桥运营阶段各种工况下的稳定安全系数。在此基础上，本文还通过有限元模型分析，就拱的矢跨比、吊杆(立柱)的非保向力效应、桥面系的刚度、横撑布置形式、拱肋侧倾角等因素对该桥整体稳定性的影响展开探讨与研究。文中给出了各因素变化情况下的稳定安全系数，指出了对钢管混凝土提篮拱横向稳定性有显著影响的因素及其合理变化范围，并对铜瓦门大桥提高横向稳定性的措施的经济合理性进行了分析。
At last the dynamics of trailer is analysed when trouble is take place including the lateral stability when the anti yaw dampers become ineffective , the ride index when airsprings have no air and the negotiation when the trailer runs on the curve the tilting actuator does n ' t work or work in the contrary direction 最后，论文分析了拖车在几种故障工况下的动力学性能，包括抗蛇行减振器失效工况的横向稳定性；空气弹簧无气工况的运行平稳性；曲线通过时倾摆作动器不动作和倾摆作动器反向动作工况拖车的动态曲线通过性能。
On the basis of original parameters the suspension parameters of trailer has been optimized by using the simulation model . two groups of optimum parameters are picked up which will ensure the better comprehensive performance of trailer including lateral stability , ride index and negotiation 利用建立的仿真计算模型，在转向架原始参数的基础上，对拖车的悬挂参数进行了优化，优选出使拖车的综合动力学性能包括横向稳定性、运行平稳性和动态曲线通过性能良好的两组参数组合。
