Dynamic Characteristics Analysis of Catenary and Pantograph with Expansion Elements
Through the finite element method,the modal analysis of key catenary components such as the anchor segment and the expansion element are carried out,and the coupling dynamic characteristics analysis model of carbon sliding-catenary structure is built.The results show that the first-order frequency of the expansion element is 67.42 Hz,which is mainly the response of the two internal rods,and the maximum amplitude is 0.916 mm.The expansion joint is not sensitive to low frequency vibration,while the high frequency vibration arouses the vibration of the internal member,and the vibration of the expansion element housing will be aroused at the fifth mode(111.33 Hz),which is extremely harmful.The vibration frequency calculated by the overall mode of the catenary is low with the first order vibration frequency of 1.89 Hz,which is mainly the low-frequency vibration of bus bars,making it less likely to cause the vibration of expansion joints.And the calculation results of the carbon slip-catenary system model are deemed reasonable.There are two obvious shock vibrations at the expansion element,which may be caused by the sudden change of contact stiffness when the bow head passes through the expansion element.The analysis and calculation of the coupling dynamic characteristics of the carbon slide and catenary structure provide a theoretical and data foundation for the design of expansion elements.
expansion elementcarbon slidecatenarydynamic characteristicsfinite element method
NETL
NSTL
万方数据
