| With economy develops, people have more demanding with their transportation.High-speed railway includes many advantages, such as high-speed, clean, convenient, and comfortable, etc. Cause these special features, high-speed railway becomes a crucial choice for people when they select transportation tools. It is important to know that the speed for this kind of railway is fast, so it has really strict requirement for the curvature of railway, while bridges occupy a large proportion of high-speed railway. In addition, simply supported bridge is the most normal type of bridge in constructing high-speed railway. Therefore, it is essential to explore the vehicle-bridge coupled dynamic response based on simply supported bridge.This paper aims to bridge the rigidity of the vehicle running performance impact analysis system, mainly study two variables affect the speed and rigidity of the vehicle dynamic response of the bridge, derived the rigidity of the vehicle speed and traveled influencing rule.The characteristic of this paper is a combination of practical engineering, vehicle bridge dynamic response of using ANSYS and SIMPACK software, of course of study to study the regularity. Due to the stiffness of a simply supported beam requirements specification expressly mentioned study Chinese and foreign scholars on the high-speed railway simply supported beam bridges there are a lot of this research has great guidance.The major points are on the below:(1) Introduce high-speed railway development and current situation, highlighting the characteristics of high-speed railway bridges and high-speed railway vehicles, describes the development and main results axle coupling dynamics, the expression of the content and significance of this paper.Multi-body system dynamics is a really important fundamental theory for this essay, Paper detailedly describe this theory in chapter two. And describe Lagrange's equation and vehicle-bridge space dynamics as well.(2) In this paper, multi-body dynamics are very important basic theory, the second chapter has been described in detail, but also on the Lagrange equation and axle space kinetics statements.(3) Establishing 32 m dimensional finite element model was built and supported beam by vehicle model specification, introduced software co-simulation mode, and the corresponding dynamic response criteria is described(4) Each take a single lane, five stiffness, controlling factor 5 speed, to bridge coupling model were single and dual calculations. Dynamic response of the body such as the derailment coefficient, axle load shedding rate, lateral acceleration, vertical acceleration is calculated and evaluated,when the stiffness coefficient is greater than 1, the change of thevertical acceleration of the vehicle body decreases, and the increase of the stability of the bridge stiffness on the existing foundation is not significant.; such as the dynamic response of the bridge span transverse vibration displacement and cross lateral acceleration across the vertical vibration displacement across the vertical vibration acceleration is calculated and evaluated.(5) Rigidity, speed of these two factors to walk the line resistance of the vehicle were analyzed, single and double track of vehicle bridge dynamic response analysis, the obvious difference is that stationary and stable double poor in single, also in line with common sense.Double line in the dynamic response of the bridge image law is more obvious, and the rest is not quite different,and this proposition is prospected. |
PDF Full Text Request