Application of Doppler LIDAR Sensors for Assessing Track Gauge Widening in Curves and Locations With High-Lateral Forces

Ahmadian, Mehdi; Jones, J. Bernard; Larson, Ian A

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Application of Doppler LIDAR Sensors for Assessing Track Gauge Widening in Curves and Locations With High-Lateral Forces

2023-10-01
By Ahmadian, Mehdi ; Jones, J. Bernard ; Larson, Ian A

File Language:

English

Details

Creators:

Ahmadian, Mehdi ; Jones, J. Bernard ; Larson, Ian A
Corporate Creators:

Virginia Tech. Center for Vehicle Systems and Safety Railway Technologies Laboratory
Corporate Contributors:

United States. Department of Transportation. University Transportation Centers (UTC) Program ; United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology
Subject/TRT Terms:
Publication/ Report Number:

RailTEAM VT-5
Resource Type:

Tech Report
Geographical Coverage:

United States ; Virginia
Edition:

Final Report VT-5
Corporate Publisher:

United States. Department of Transportation. University Transportation Centers (UTC) Program
Abstract:

The primary purpose of this study is to evaluate the use of Doppler Lidar sensors for assessing track weakening that would indicate early stages of track instability. Such track weakening could lead to gage widening or track buckling due to rail thermal expansion. A series of tests were performed at the Transportation Technology Center’s High Tonnage Loop, where two sections of track were “doctored” to have weaker lateral strength, one on a tangent and another one in a curve. Multiple tests were performed at speeds ranging from 10 – 40 mph during which the lateral and vertical deflections of the rail were measured under the weight of the passing wheels of a heavily loaded gondola. The track weakness is created by removing the rail spikes from eight consecutive ties. The measurements from the soft sections were compared with a track section on a tangent length of track that is determined to have nominally sufficient (“good”) stiffness.
Format:

PDF
Funding:

69A3551747132
Download URL:

https://rosap.ntl.bts.gov/view/dot/80652/dot_80652_DS1.pdf
File Type:

[PDF - 6.55 MB]
Collection(s):

University Transportation Centers
Main Document Checksum:

urn:sha-512:963057953f1284c0343ac1690b6b24c537916abbe478a8bdd49be98ffffd72b301251dd4e4f3b52f0762bc0087acae8e07df648209acc3a81531fc186ab92ac8

File Language:

English

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