Assessment of Railroad Locomotive Noise

Remington, Paul J.; Rudd, Michael J.; Bolt, Beranek, and Newman, inc.

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Assessment of Railroad Locomotive Noise

1976-08-01
By Remington, Paul J. ; Rudd, Michael J.

[PDF-4.71 MB]

English

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Details:

Creators:

Remington, Paul J. ; Rudd, Michael J.

Remington, Paul J. ; Rudd, Michael J. Less -
Corporate Creators:

Bolt, Beranek, and Newman, inc.
Corporate Contributors:

John A. Volpe National Transportation Systems Center, (U.S.) ; United States. Federal Railroad Administration. Office of Research and Development

John A. Volpe National Transportation Systems Center, (U.S.) ; United States. Federal Railroad Administration. Office of Research and Development Less -
Subject/TRT Terms:

[+]

Acoustic Measuring Instruments Acoustics Diesel Engines Locomotives Noise Noise Sources Sound Level
Publication/ Report Number:

DOT-TSC-OST-76-4 ; FRA-OR&D-76-142

DOT-TSC-OST-76-4 ; FRA-OR&D-76-142 Less -
Resource Type:

Tech Report
Geographical Coverage:

United States
Corporate Publisher:

United States. Dept. of Transportation. Office of the Secretary
NTL Classification:

AGR-IMPACTS-IMPACTS;AGR-IMPACTS-Environment;NTL-RAIL TRANSPORTATION-Rail Energy and Environment;NTL-RAIL TRANSPORTATION-RAIL TRANSPORTATION;
Abstract:

Measurements of the noise generated by an SD40-2 diesel electric locomotive are described. The noise was measured in three types of moving tests: the first with the locomotive passing a 6-microphone array while under maximum power acceleration, the second with the locomotive simulating the pulling of a train, and the third with the locomotive coasting by unpowered. Stationary noise measurements were made at 16- microphone positions around the locomotive while it was attached to a load cell. The moving tests show that at the lower throttle settings, wheel/rail noise may be an important contributor to the overall locomotive noise signature even at modest speeds (20 mph and above at throttle 1 and 30 mph and above at throttle 4). At throttle 8, wheel/rail noise does not become a significant source until speeds in excess of 50 mph are reached. At throttle 8 and at speeds below 50 mph, noise spectra measured opposite the moving locomotive are comparable to noise spectra measured opposite the stationary locomotive. Diagnostic tests to determine how much the various sources contributed to the overall noise were performed at seven positions on one side of the locomotive. The engine exhaust and intake, the engine/generator, the radiator cooling fans, the dynamic brake fans, the traction motor blowers, the dust bin blower compressor, and structure-borne noise have all been identified. At high throttle settings the exhaust and radiator cooling fans dominate. At low throttle settings the engine/generator, the exhaust and the cooling fans all contribute to the overall noise.
Format:

PDF
Collection(s):

Volpe Center
Main Document Checksum:

[+]

urn:sha256:38490096c6731ff641accdee64d9707c7176cde6ddb7c5b6465378b9689a9091
Download URL:

https://rosap.ntl.bts.gov/view/dot/10815/dot_10815_DS1.pdf
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Assessment of Railroad Locomotive Noise

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