EFFECT OF UNCERTAINTY OF FASTENING SYSTEMS PROPERTIES ON WHEEL/RAIL DYNAMIC FORCE

JAVAD SADEGHI; MOHAMMAD SEYEDKAZEMI; AMIN KHAJEHDEZFULY

doi:10.1590/1679-78256537

EFFECT OF UNCERTAINTY OF FASTENING SYSTEMS PROPERTIES ON WHEEL/RAIL DYNAMIC FORCE

Authors

JAVAD SADEGHI SCHOOL OF RAILWAY ENGINEERING, IRAN UNIVERSITY OF SCIENCE AND TECHNOLOGY, 16846 TEHRAN, IRAN HTTP://ORCID.ORG/0000-0002-3321-2523
MOHAMMAD SEYEDKAZEMI SCHOOL OF RAILWAY ENGINEERING, IRAN UNIVERSITY OF SCIENCE AND TECHNOLOGY, 16846 TEHRAN, IRAN HTTPS://ORCID.ORG/0000-0003-0092-8362
AMIN KHAJEHDEZFULY FACULTY OF CIVIL ENGINEERING AND ARCHITECTURE, SHAHID CHAMRAN UNIVERSITY OF AHVAZ, 6135783151, AHVAZ, IRAN HTTPS://ORCID.ORG/0000-0001-9219-003X

DOI:

https://doi.org/10.1590/1679-78256537

Abstract

IN THIS PAPER, EFFECT OF UNCERTAINTY OF FASTENING SYSTEM PROPERTIES ON THE WHEEL/RAIL DYNAMIC FORCE (WRDF) WAS INVESTIGATED. FOR THIS PURPOSE, TWO DETERMINISTIC AND EPISTEMIC MODELS OF VEHICLE/TRACK INTERACTION WERE DEVELOPED, USING THE FINITE ELEMENT METHOD. VALIDITY OF THE RESULTS OBTAINED FROM THE MODELS WAS SHOWN THROUGH COMPARISON BETWEEN THE MODEL RESULTS AND THOSE OBTAINED FROM FIELD TESTS. THE EFFECTS OF UNCERTAINTY OF FASTENING SYSTEM PROPERTIES ON THE WRDF IN DIFFERENT AXLE LOADS, VEHICLE SPEEDS, RAIL IRREGULARITIES AND VARIOUS TRACK MAINTENANCE CONDITIONS WERE DERIVED THROUGH PROBABILITY AND SENSITIVITY ANALYSES. USING THE RESULTS OBTAINED, SOME CONTOURS WERE DEVELOPED TO OBTAIN THE AMPLIFICATION OF WRDF (DUE THE UNCERTAINTY OF FASTENING SYSTEM PROPERTIES) AS A FUNCTION OF VEHICLE AXLE LOAD, VEHICLE SPEED AND TRACK MAINTENANCE CONDITIONS.

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Published

2021-05-10

Issue

Vol. 18 No. 5 (2021)

Section

Articles

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