Abstract
The parameters of the monorail bridge, which have a significant effect on the vehicle, are analyzed in this paper. With Park method, a complicated solver of the second order with a variable step size, equations insolvable to traditional methods can be solved and a more complicated dynamic model could be built. Different from some traditional simulation of vehicle–bridge coupling system, the bridge is divided into the girder and piers. The finite element model of each part is created separately in Ansys and coupled with the vehicle system in UM, which helps the analysis of the interaction forces between flexible components and better simulation accuracy can be obtained. FIALA model is used to calculate the wheel force. These methods make the measurement more precise. The study shows that all the variables except for the stiffener thickness have little effect on the vibration of the vehicle due to the good vibration reduction performance of the vehicle system. The resonance of the girder could be avoided by changing the thickness of the stiffeners and web plates. In addition, high stiffness and damping of the connection point of the girder and pier are helpful in alleviating the vibration of the bridge.
Highlights
In the recent years, traffic jam has seriously affected people’s daily lives.[1,2,3,4] The invention of monorail, which has the advantage of low cost, low noise, strong climbing ability, and low turning radius,[5,6] has greatly eased traffic congestion
Web plate and reinforcement are given a certain value, indicating that the resonance is caused by the excitation of the natural frequencies of the girder
By studying the local stability of current popular methods for nonlinear problems and some complex equations, it can be inferred that the historical derivatives will lead to numerical instability in nonlinear dynamics even for the methods proven unconditionally stable in the linear systems
Summary
Traffic jam has seriously affected people’s daily lives.[1,2,3,4] The invention of monorail, which has the advantage of low cost, low noise, strong climbing ability, and low turning radius,[5,6] has greatly eased traffic congestion. The suspended monorail, invented in Germany and developed in Japan, has drawn attention in China. Nowadays, both German type and Japanese type are the most widely used monorail types in the world. The structure of the German bogie looks like an automobile, while the Japanese bogie is similar to that of the railway vehicle. There are stable wheels on the German bogies to prevent vehicles from overturning, but not on the Japanese bogies.
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