TRAFFICABILITY OF SOILS-18TH SUPPLEMENT-DEVELOPMENT OF REVISED MOBILITY INDEX FORMULA FOR SELF-PROPELLED WHEELED VEHICLES IN FINE-GRAINED SOILS

SOIL TRAFFICIABILITY TESTS WERE CONDUCTED TO DEVELOP INSTRUMENTS AND TECHNIQUES FOR THE MEASUREMENT OF SURFACE MEDIA AND THE PREDICTION OF PERFORMANCE OF MILITARY VEHICLES ON THESE MEDIA. FOUR GENERAL TYPES OF SURFACE MEDIA WERE STUDIED: FINE-GRAINED SOILS, COURSE-GRAINED SOILS (SAND BEACHES AND DESERTS), ORGANIC TERRAIN (MUSKEG), AND SNOW. TEST DATA WERE OBTAINED TO DETERMINE EXPERIMENTALLY THE VEHICLE CONE INDEX (VCI) FOR 50 PASSES FOR SOME UNTESTED VEHICLES, AND TO USE THE RESULTS OF THESE TESTS AND OTHERS IN WHICH EXPERIMENTAL VCI'S WERE DETERMINED TO DEVELOP A MOBILITY INDEX FORMULA SUITABLE FOR A WIDE RANGE OF VEHICLE WEIGHTS AND TIRE SIZES. VCI'S WERE DETERMINED FOR 20 VEHICLE TYPES. A STATISTICAL ANALYSIS WAS PERFORMED ON BOTH THE ORIGINAL AND REVISED MI FORMULAS TO DETERMINE IF IMPROVEMENT IN PREDICTING VCI COULD BE MADE. MULTIPLE LINEAR REGRESSION TECHNIQUES WERE USED. RESULTS INDICATE THAT CONSIDERABLE IMPROVEMENT CAN BE MADE IN THE ORIGINAL FORMULA BY USING THE MULTIPLE REGRESSION EQUATION, SINCE THIS TECHNIQUE PERMITS THE COMPUTATION OF A DEPENDENT VARIABLE (MI) WHEN TWO OR MORE INDEPENDENT VARIABLES (VEHICLE FACTORS) ARE RELATED TO THE DEPENDENT VARIABLE. THE VALIDITY OF THE REVISED MI FORMULA IS CHECKED BY INDIVIDUAL TEST RESULTS FROM TEST PROGRAMS WITH VEHICLES DIFFERENT FROM THOSE USED IN REVISING THE MI FORMULA AND COMPARED WITH THE COMPUTED VCI OF EACH VEHICLE.

  • Supplemental Notes:
    • Tm No 3-240, 80 PP, 16 FIG, 10 TAB, 19 REF, 2 APP
  • Authors:
    • Kennedy, J G
    • Rush, E S
  • Publication Date: 1968-3

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  • Accession Number: 00234385
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 1 1994 12:00AM