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链形悬挂系统静态弹性的解析计算

     

摘要

在悬索模型的基础上,通过将集中载荷替换成分布载荷在算法中引入接触线和承力索的抗弯刚度2个参数,通过提出拉出值等效吊弦分布的概念在算法中计算接触线拉出值对悬挂系统静态弹性的影响,给出简单链型悬挂系统和弹性链型悬挂系统的静态弹性的解析形式计算办法,分析接触网系统设计参数对静态弹性的影响.采用实际检测数据进行仿真计算,并将计算结果与实测数据进行比较.研究结果表明:解析形式计算方法能够有效仿真接触网系统符设计参数对链悬挂系统静态弹性的影响;增大接触线和承力索的张力和抗弯刚度,以及减小跨距会减小链型悬挂系统的静态掸性;接触线拉出值与吊弦分布对链型悬挂系统静态弹性的影响比较复杂.%Based on the suspension cable model, through introducing the bending stiffness parameters of the contact wire and support wire to the algorithm by replacing the concentrated loads with the distributed loads, and calculating the effects of the staggers in the algorithm by the idea of equivalent dropper-distribution of staggers, the analytic form calculation methods of the static elasticity of the simple type catenary system and the stitched chain suspension catenary system were presented, and the influence of the design parameters of the catenary system to the static elasticity was explored. A simulation with the simulation data from actual measurement was performed and the simulation results were compared with actual measurement. The results show that the analytic form calculation methods can effectively simulate the influence of each design parameter of the catenary system on the static elasticity. The increase of the tension and bending stiffness of the contact wire and support wire and the decrease of the span will decrease the static elasticity. The staggers of the contact wire and the distribution of droppers have a complicated effect on the static elasticity.

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