Technical Reports

Influence of Guideway Flexibility on Maglev Vehicle/Guideway Dynamic Forces

  • 01
  • Jul
  • 1992
AUTHOR: L. E. Daniels, D. R. Ahlbeck, Z. J. Stekly, G. M. Gregorek
OFFICE: RPD
REPORT NUMBER: DOT/FRA/NMI - 92/07
SUBJECT: Maglev
KEYWORDS: Magnetic Levitation, Aerial Structure Dynamics, Vehicle Dynamics, High Speed Guideways, Aerodynamics, Guideway Costs, Magnetic Suspension Characteristics, Structural Design Codes
ABSTRACT: This report presents the results of a study investigating the dynamic interaction between aerial structures and maglev vehicles. The study includes three dimensional responses for attractive (EMS) maglev vehicle and repulsive (EDS) maglev vehicles and six different guideway structures. The analysis is conducted using original time domain computer models which incorporate up to 52 degrees of freedom for EMS systems and 44 degrees of freedom for the EDS systems, including multiple span guideways, multiple-vehicle trains, aerodynamic inputs with the special relations and structural properties associated with each major system component, and with appropriate maglev suspension characteristics interconnecting vehicle to guideway. The various guideway structure and vehicle combinations are analyzed separately for two representative guideway lengths of 21 m and 39m. Results are presented for vehicle accelerations in terms of ride comfort accelerations and for guideway accelerations and bending moments. Comparisons from the analysis include EMS vs. EDS system responses, effects of span length, effects of position in car, effects of multiple-vehicle trains, effects of multiple simple span guideways vs. continuous span guideways, effects of wind gusts, and effects of beam bearing pad stiffness. Costs of each guideway is estimated in 1992 dollars.

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