Motion Resistance of Wheeled Vehicles in Snow
Before vehicle mobility in snow can be reliably predicted, a complete understanding of motion resistance in snow is required. This report examines several aspects of wheeled vehicle motion resistance using results obtained with the CRREL instrumented vehicle. Resistances of leading and trailing tire...
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ftdtic:ADA294675 2023-05-15T16:37:54+02:00 Motion Resistance of Wheeled Vehicles in Snow Richmond, Paul W. COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH 1995-03 text/html http://www.dtic.mil/docs/citations/ADA294675 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA294675 en eng http://www.dtic.mil/docs/citations/ADA294675 APPROVED FOR PUBLIC RELEASE DTIC AND NTIS Surface Transportation and Equipment Snow Ice and Permafrost *MOBILITY *SNOW *GROUND VEHICLES VELOCITY PRESSURE GRADIENTS MATHEMATICAL MODELS ALGORITHMS RESISTANCE LOADS(FORCES) COMPARISON DEFORMATION MOTION ANALYSIS OF VARIANCE DEPTH REGRESSION ANALYSIS SNOW COVER MATHEMATICAL PREDICTION TRACTION WHEELS ROAD TESTS TIRES TRUCKS NONLINEAR ANALYSIS DRAG OFFROAD TRAFFIC ARMORED VEHICLES TOWED VEHICLES HMMWV(HIGH MOBILITY MULTIPURPOSE WHEELED VEHICLES) PE62784A WUM04 Text 1995 ftdtic 2016-02-19T12:31:00Z Before vehicle mobility in snow can be reliably predicted, a complete understanding of motion resistance in snow is required. This report examines several aspects of wheeled vehicle motion resistance using results obtained with the CRREL instrumented vehicle. Resistances of leading and trailing tires are examined. Limited data are presented for undercarriage drag, and third and fourth wheel passes in the same rut are initially analyzed, as is how snow deforms around a wheel. For the CRREL instrumented vehicle, a trailing tire has a resistance coefficient of about 0.017 for snow depths less than about 22cm. For deeper snow, the disruption of the snowpack caused by a preceding wheel causes snow to fall into the rut, resulting in higher trailing tire coefficients. For larger vehicles, which in some cases have trailing tires carrying larger loads than preceding tires, the trailing tire coefficients are on the order of 0.048 and 0.025 for second and third trailing wheels respectively. Since there are no trailing tire data available for these larger vehicles, these values are based on nonlinear regression analysis, which includes a prediction of the leading tire resistance. The results and observations of this study are applied in a reanalysis of the towed resistance data obtained during the U.S. Army's Wheels vs. Tracks study. An improved algorithm is presented for predicting wheeled vehicle motion resistance caused by snow. (AN) Text Ice permafrost Defense Technical Information Center: DTIC Technical Reports database |
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Open Polar |
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Defense Technical Information Center: DTIC Technical Reports database |
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ftdtic |
language |
English |
topic |
Surface Transportation and Equipment Snow Ice and Permafrost *MOBILITY *SNOW *GROUND VEHICLES VELOCITY PRESSURE GRADIENTS MATHEMATICAL MODELS ALGORITHMS RESISTANCE LOADS(FORCES) COMPARISON DEFORMATION MOTION ANALYSIS OF VARIANCE DEPTH REGRESSION ANALYSIS SNOW COVER MATHEMATICAL PREDICTION TRACTION WHEELS ROAD TESTS TIRES TRUCKS NONLINEAR ANALYSIS DRAG OFFROAD TRAFFIC ARMORED VEHICLES TOWED VEHICLES HMMWV(HIGH MOBILITY MULTIPURPOSE WHEELED VEHICLES) PE62784A WUM04 |
spellingShingle |
Surface Transportation and Equipment Snow Ice and Permafrost *MOBILITY *SNOW *GROUND VEHICLES VELOCITY PRESSURE GRADIENTS MATHEMATICAL MODELS ALGORITHMS RESISTANCE LOADS(FORCES) COMPARISON DEFORMATION MOTION ANALYSIS OF VARIANCE DEPTH REGRESSION ANALYSIS SNOW COVER MATHEMATICAL PREDICTION TRACTION WHEELS ROAD TESTS TIRES TRUCKS NONLINEAR ANALYSIS DRAG OFFROAD TRAFFIC ARMORED VEHICLES TOWED VEHICLES HMMWV(HIGH MOBILITY MULTIPURPOSE WHEELED VEHICLES) PE62784A WUM04 Richmond, Paul W. Motion Resistance of Wheeled Vehicles in Snow |
topic_facet |
Surface Transportation and Equipment Snow Ice and Permafrost *MOBILITY *SNOW *GROUND VEHICLES VELOCITY PRESSURE GRADIENTS MATHEMATICAL MODELS ALGORITHMS RESISTANCE LOADS(FORCES) COMPARISON DEFORMATION MOTION ANALYSIS OF VARIANCE DEPTH REGRESSION ANALYSIS SNOW COVER MATHEMATICAL PREDICTION TRACTION WHEELS ROAD TESTS TIRES TRUCKS NONLINEAR ANALYSIS DRAG OFFROAD TRAFFIC ARMORED VEHICLES TOWED VEHICLES HMMWV(HIGH MOBILITY MULTIPURPOSE WHEELED VEHICLES) PE62784A WUM04 |
description |
Before vehicle mobility in snow can be reliably predicted, a complete understanding of motion resistance in snow is required. This report examines several aspects of wheeled vehicle motion resistance using results obtained with the CRREL instrumented vehicle. Resistances of leading and trailing tires are examined. Limited data are presented for undercarriage drag, and third and fourth wheel passes in the same rut are initially analyzed, as is how snow deforms around a wheel. For the CRREL instrumented vehicle, a trailing tire has a resistance coefficient of about 0.017 for snow depths less than about 22cm. For deeper snow, the disruption of the snowpack caused by a preceding wheel causes snow to fall into the rut, resulting in higher trailing tire coefficients. For larger vehicles, which in some cases have trailing tires carrying larger loads than preceding tires, the trailing tire coefficients are on the order of 0.048 and 0.025 for second and third trailing wheels respectively. Since there are no trailing tire data available for these larger vehicles, these values are based on nonlinear regression analysis, which includes a prediction of the leading tire resistance. The results and observations of this study are applied in a reanalysis of the towed resistance data obtained during the U.S. Army's Wheels vs. Tracks study. An improved algorithm is presented for predicting wheeled vehicle motion resistance caused by snow. (AN) |
author2 |
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH |
format |
Text |
author |
Richmond, Paul W. |
author_facet |
Richmond, Paul W. |
author_sort |
Richmond, Paul W. |
title |
Motion Resistance of Wheeled Vehicles in Snow |
title_short |
Motion Resistance of Wheeled Vehicles in Snow |
title_full |
Motion Resistance of Wheeled Vehicles in Snow |
title_fullStr |
Motion Resistance of Wheeled Vehicles in Snow |
title_full_unstemmed |
Motion Resistance of Wheeled Vehicles in Snow |
title_sort |
motion resistance of wheeled vehicles in snow |
publishDate |
1995 |
url |
http://www.dtic.mil/docs/citations/ADA294675 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA294675 |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA294675 |
op_rights |
APPROVED FOR PUBLIC RELEASE |
_version_ |
1766028199898120192 |