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Accession Number:
ADA090720
Title:
Partial Field Validation of the Surfzone Transition Analytical Methodology (STAM)
Descriptive Note:
Final rept
Corporate Author:
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS GEOTECHNICAL LAB
Report Date:
1980-09-01
Pagination or Media Count:
80.0
Abstract:
Results from field tests of the full-size tracked Surfzone Test Vehicle STV conducted over a two-week period at two sandy beachnearshore sites were used to investigate some key vehicle performance prediction relations in the trafficability submodel of the computerized Surfzone Transition Analytical methodology STAM. Analysis of the STV test results, along with results from related tests of full-size tracked vehicles and model tracks, demonstrated that STAM equations for predicting the drawbar pull and total motion resistance of tracked vehicles are adequate and, in fact, slightly conservative for nearly all coarse-grained soiltracked vehiclevehicle submergence conditions. For extreme conditions of low coarse-grained soil strength and high tracked vehicle ground contact pressure, modifications were made to the trafficability submodel relations to predict significantly smaller values of tracked vehicle drawbar pull. Finally, suggestions were presented for needed model and prototype testing to validate prediction relations in STAMs other two submodels--the water force calculations and vehicle stability submodels--as well as prediction relations in yet unvalidated parts of STAMs trafficability submodel primarily relations for obstacle override and for tracked vehicle operation in fine-grained soil near-shore areas.
Distribution Statement:
APPROVED FOR PUBLIC RELEASE
