Other Reports

Maglev System Concept Definition: Hypothetical Route Report

  • 30
  • Sep
  • 1992
AUTHOR: Bechtel Corporation
KEYWORDS: Cost Analysis, Computer Program, Performance Profiles
ABSTRACT: [From the Introduction] The hypothetical route simulation is a computer program for simulating maglev on a benchmark guideway alignment for performance assessment of the maglev transportation system within the context of the current System Concept Definition contract. The total guideway distance of the hypothetical route from terminal #1 where it starts, to terminal #4 where it ends, is 800 km and consists of a number of horizontal curves with radii of curvature as small as 400 m, and elevation grades as steep as 10 percent. Terminal #2 is located at 400 km and terminal #3 is at 470 km. We are to assume that the vehicle only stops momentarily at these terminals. In addition, there is a 5 km tunnel beginning at 515 km from terminal #1. The route meanders horizontally and vertically until 475 km, at which point it is straight and level until terminal #4. Our maglev simulation has adapted the hypothetical route alignment for determination of significant characteristic parameters for the Bechtel concept maglev. This simulation consists of programs that have been specifically tailored to allow analysis of the hypothetical route, and in fact these same programs are being used by the Government in its analysis of the performance characteristics of alternate SCD concepts for the National Maglev Initiative. Inputs to the simulation include route alignment data, positions of stations, maximum line speed, maximum banking angle, kinematic parameter limits such as accelerations, jerks, and braking. Outputs include total trip time, velocity vs distance or time and acceleration vs distance or time. The distance and time increment resolution is adjustable. Total trip time is the total time for the vehicle to travel beginning to the end of the hypothetical route. The vehicle stops at stations only momentarily in the model. Vehicle velocity and acceleration profiles give the total velocity vs distance or time and acceleration vs distance or time, respectively, traveled by the vehicle at any given distance or time increment.