Date of Award
Fall 2009
Document Type
Thesis
Degree Name
Master of Science (MS)
Department
Mechanical & Aerospace Engineering
Program/Concentration
Aerospace Engineering
Committee Director
Keejoo Lee
Committee Member
Colin Britcher
Committee Member
Thomas Alberts
Call Number for Print
Special Collections; LD4331.E535 V45 2009
Abstract
A flexible guideway on an elevated foundation is a key to affordable maglev urban transit. The flexible guideway can undergo significant dynamic motion, either when a vehicle solely relies on an open-loop control system or when a vehicle equipped with feedback control system experiences failure, due to fluctuating magnetic forces between the vehicle and the guideway. In an attempt to understand the effect of the uncontrolled vehicle on the structural response of the guideway, its dynamic interaction with maglev vehicles is investigated under various operating conditions. To this end, two vehicle models using Electrodynamic suspension (EDS) and Electromagnetic suspension (EMS) maglev technologies, each equipped with two magnets and a guideway structural model over multiple spans are developed. These models are used to determine the fluctuating air gap between vehicle and guideway. The effect of the vehicle mass on the air gap change is examined for a given guideway design at various operating speeds. Subsequently, the effect of the guideway span length on the air gap change is estimated for various vehicle sizes. Numerical results indicate that the dynamic interaction of the guideway with uncontrolled vehicles become more significant as the vehicle size increases. Though believed negligible, the interactions at low speed such as 5 m/s can be significant for heavy vehicles. A separate study is carried out to examine the behavior of different uncontrolled vehicles on multiple span guideways. It is found that the EDS system vehicles are inherently stable on stiff guideways only. They may fail or crash on to the guideway while traveling on a flexible guideways irrespective of the vehicle speed. Whereas for an Electromagnetic (EMS) maglev system, irrespective of the vehicle size and speed, the vehicle crashes on to the guideway almost immediately after the control system malfunctions.
Rights
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DOI
10.25777/90n8-gw19
Recommended Citation
Velma, Sumanth R..
"Dynamic Interaction of Elevated Guideway with Uncontrolled Maglev Vehicles"
(2009). Master of Science (MS), Thesis, Mechanical & Aerospace Engineering, Old Dominion University, DOI: 10.25777/90n8-gw19
https://digitalcommons.odu.edu/mae_etds/741