Abstract
Based on the Lagrange equation, the linear and nonlinear dynamic models of straddle monorail pantograph considering the lateral vibration of bogie are derived. On this basis, the lateral coupling dynamic model of pantograph-catenary is established. Newmark method is used to solve the pantograph-catenary coupling dynamic model. In order to evaluate the applicability of the two models，this paper analyzed the contact force response of two model with different speeds. The reasearch show that when the speed is below 40 km/h, the contact forces of nonlinear model and linear model can reflects the lateral excitation of the finger plate. When the speed exceeds 40 km/h, only the nonlinear model can reflect the lateral excitation of finger palte, the nonlinear pantograph-catenary coupling dynamics model is more suitable to the straddle-type monorail pantograph-catenary coupling research.
Highlights
Straddle-type monorail is a new type form of urban rail transit system which has some advantages such as: small turning radius, low manufacturing cost, strong climbing ability and ride comfort [1, 2]
When the straddle monorail is running on the track, the excitation of the finger plate on the side of the track will be caused the lateral vibration of the bogie, which will affect the quality of power collection
At the speed of 20 and 40 km/h, the contact forces of the two models have periodic fluctuations and the fluctuation period is 22 m, which reflects the transverse excitation of the finger plate
Summary
Straddle-type monorail is a new type form of urban rail transit system which has some advantages such as: small turning radius, low manufacturing cost, strong climbing ability and ride comfort [1, 2]. Because of the unique driving principle of straddle-type monorail vehicles, the structure of atraddle-type monorail bogie is special. While running wheels provide the longitudinal movement, guide wheels lead the monorail vehicle along the track. Because the rubber tires of running wheel, guide wheel and stabilizer wheel are flexible. Because of the unique driving principle of straddle-type monorail, the interaction between side mounted pantograph and the side catenary is special. The working environment of straddle-type monorail vehicle pantograph is different from that of metro and high-speed railway, so it is necessary to study the pantograph modeling of straddletype monorail. Research the accurate pantograph model suit for straddle-type monorail has great significance to improve the operation safety of straddle-type monorail
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