Dynamics Study of Straddle-Type Monorail Vehicle With Single-Axle Bogies-Based Full-Scale Rigid-Flexible Coupling Dynamic Model

Junchao Zhou,Zhouzhou Xu,Zixue Du,Zhen Yang

doi:10.1109/access.2019.2933991

Junchao Zhou, Zhouzhou Xu + Show 2 more

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https://doi.org/10.1109/access.2019.2933991

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Abstract

The longitudinal drawbar and the lateral stabilizer bar of straddle-type monorail vehicle with the single-axle bogies have relatively long structure size. The multibar system leads to deformation during the driving process due to impact loads, even leads to influence on the dynamic characteristic of the hauling mechanism as well as the riding comfort of the whole vehicle. To evaluate the dynamic behavior of straddle-type monorail vehicle with single-axle bogies accurately, a full-scale rigid-flexible coupling multibody dynamics method is proposed based on multibody dynamics and finite element (FE) theory. The modal synthesis method is adopted to establish flexible multibody dynamics of the single-axle bogies. And then rigid-flexible coupling dynamic model of the straddle-type monorail vehicle is established with the ADAMS software. The validity of the full-scale model is verified. Finally, the influences of vehicle velocity, passenger mass, curve radius and the number of axles on dynamic characteristics are discussed.

Highlights

With the rapid development of the society and the economy as well as the accelerated urbanization process, urban traffic has been facing huge pressure
The goal of this study is to carry out a systematical investigation of effects of spatial multibar mechanisms flexibility on the dynamic behavior of monorail vehicle, where it shows the necessity of introducing the spatial multibar mechanisms flexibility into straddle-type monorail vehicle dynamics
VEHICLE VELOCITY The influences of dynamic acceleration at different velocities and the root mean square (RMS) of the vehicle are shown in Fig.8 in line condition

Summary

Introduction

With the rapid development of the society and the economy as well as the accelerated urbanization process, urban traffic has been facing huge pressure. The straddle-type monorail vehicle with single-axle bogies is a medium-traffic elevated rail transit system with the advantages of smaller curve radius and lower noise than the subway. Costs of construction, most research in this area has been conducted by numerical analysis rather than experimental evaluation. With the development of virtual prototypes, some scholars have established the multi-body dynamical model for monorail vehicles by utilizing dynamical software. By utilizing multi-rigid body dynamics, Gado et al [5] conducted analysis on dynamical response to the straddle-type monorail vehicles. In order to evaluate the riding comfort of railway vehicles on bridges, the Lagrange Equation was utilized to establish the railway vehicle-bridge coupling motion equation and the vehicle equation of 15 degrees of freedom, with test analysis [6].

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