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Improving the Traction Prediction Capabilities in the NATO Reference Mobility Model (NRMM).

ADA368656

Publication Date	1999
Personal Author	Priddy, J. D.
Page Count	216
Abstract	The NATO Reference Mobility Model (NRMM) has traction relationships that describe the performance of vehicles in naturally occurring soils reasonably well, but they have weaknesses stemming primarily from an inadequate consideration of the influence of vehicle characteristics on traction. This research sought to demonstrate the feasibility of developing better traction relationships for NRMM through exploitation of existing data. In order to demonstrate the feasibility, a statistical modeling effort was conducted for developing new traction relationships. The research involved a systematic and extensive exploration of new and old traction modeling concepts that rely on relatively simple characterizations of the vehicle and the soil. The effort concentrated on one-pass vehicle cone index (VCI1) and drawbar performance of pneumatic-tired vehicles on nonslippery, highly plastic clay soils (CH classification). The results demonstrated that better traction relationships can be developed for NRMM and provided new insight into the controlling mechanisms in VCI1 and drawbar performance.
Keywords	Data bases Systems engineering Military vehicles Traction Mathematical models Nato Mobility Predictions Model theory Soils Clay Plastic properties Indexes Statistical analysis Conical bodies Nrmm (Nato reference mobility model) Vehicle cone index Drawbar pull
Source Agency	Non Paid ADAS
Corporate Authors	Army Engineer Waterways Experiment Station, Vicksburg, MS. Geotechnical Lab.
Document Type	Technical Report
Title Note	Final rept.
NTIS Issue Number	200003

Improving the Traction Prediction Capabilities in the NATO Reference Mobility Model (NRMM).

Improving the Traction Prediction Capabilities in the NATO Reference Mobility Model (NRMM).
ADA368656

Publication Date	1999
Personal Author	Priddy, J. D.
Page Count	216
Abstract	The NATO Reference Mobility Model (NRMM) has traction relationships that describe the performance of vehicles in naturally occurring soils reasonably well, but they have weaknesses stemming primarily from an inadequate consideration of the influence of vehicle characteristics on traction. This research sought to demonstrate the feasibility of developing better traction relationships for NRMM through exploitation of existing data. In order to demonstrate the feasibility, a statistical modeling effort was conducted for developing new traction relationships. The research involved a systematic and extensive exploration of new and old traction modeling concepts that rely on relatively simple characterizations of the vehicle and the soil. The effort concentrated on one-pass vehicle cone index (VCI1) and drawbar performance of pneumatic-tired vehicles on nonslippery, highly plastic clay soils (CH classification). The results demonstrated that better traction relationships can be developed for NRMM and provided new insight into the controlling mechanisms in VCI1 and drawbar performance.
Keywords	Data bases Systems engineering Military vehicles Traction Mathematical models Nato Mobility Predictions Model theory Soils Clay Plastic properties Indexes Statistical analysis Conical bodies Nrmm (Nato reference mobility model) Vehicle cone index Drawbar pull
Source Agency	Non Paid ADAS
Corporate Authors	Army Engineer Waterways Experiment Station, Vicksburg, MS. Geotechnical Lab.
Document Type	Technical Report
Title Note	Final rept.
NTIS Issue Number	200003