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Title: TEST SIMULATIONS OF A SINGLE-TRACK SUBWAY ENVIRONMENT
Accession Number: 00335205
Record Type: Component
Availability: Find a library where document is available Abstract: The Subway Environment Simulation (SES) Computer Program was developed to analyze flows of air and heat in complex subway networks. As part of a recent effort to enhance its cost-effectiveness, the SES was reworked to operate on the central computer facility at the Transportation Systems Center in order to provide project administrators with real-time access capabilities. To demonstrate these capabilities, a series of test cases was devised that illustrated the transformation of data from input to output that would characterize more-detailed simulations. A single-track, two-step route was selected for a base that allowed for the introduction of variable scheduling, track alignment, speed restrictions, coasting, distributed heat sources, blockage ratios, head losses, station impedances, vent shafts, and fans. Data were derived from prior sample problems described in the Subway Environmental Design Handbook. The requirements for input verification and computational execution of each case are described. The program output details, at user-specified intervals, the train's position and speed, heat rejection, induced airflow, system air velocities, temperature, and humidity. Data are summarized and compared by using baseline time-location profiles. These results are contrasted with alternative methods for quantifying the subway environment, including a model of propulsive force estimated by linear regression of the manufacturer's data. Further analysis provides insight into the development of design strategies through basic simulation. In conjuction with piston action, the tunnel-vent configuration has a predictable effect on resulting patterns of airflow. Fundamental parametric relationships are evaluated, and implications for environmental control in stations are discussed. (Author)
Supplemental Notes: Publication of this paper sponsored by Committee on Tunnels and Underground Structures. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
Monograph Title: Monograph Accession #: 01411603
Authors: Meltzer, NeilPagination: pp 40-45
Publication Date: 1980
Serial: Conference:
59th Annual Meeting of the Transportation Research Board
Location:
Washington District of Columbia, United States ISBN: 0309031745
Media Type: Print
Features: Figures
(8)
; References
(3)
TRT Terms: Subject Areas: Bridges and other structures; Design; Environment; Highways; Public Transportation; Terminals and Facilities; I25: Design of Tunnels
Files: TRIS, TRB
Created Date: Oct 28 1982 12:00AM
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