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dc.contributor.authorLessem, Allan S.-
dc.contributor.authorMobility and Environmental Systems Laboratory (U.S.)-
dc.identifier.govdocTechnical Report M-68-1 Report 1-
dc.descriptionTechnical Reporten_US
dc.description.abstractA mathematical model for a pneumatic tire was used to compute the horizontal and vertical forces transmitted through the tire to the vehicle axle to provide realistic force inputs for model studies of vehicle dynamic. The present model is valid for the computation of forces through a pneumatic tire traversing nondeforming obstacles, with zero slip. Laboratory tests are described in which static load deformation characteristics and dynamic obstacle-traversal characteristics were obtained. These tests were run with 9.00-14 tires under several conditions of ply rating and inflation pressure. Data from these tests were used to calculate model parameters and to produce time histories of dynamic responses. A computer implementation of the mathematical model is described which produced force and displacement time histories similar to those obtained during the obstacle-traversal laboratory tests. The model produced the essential features of the wave form seen in the laboratory and is therefore a valid representation of a pneumatic tire for dynamic analysis of vehicle on nonyielding terrain.en_US
dc.description.sponsorshipSponsored by U. S. Army Materiel Command, Task 1-V-0-14501-B52A-0Ien_US
dc.description.tableofcontentsFOREWORD iii CONVERSION FACTORS, BRITISH TO METRIC UNITS OF MEASUREMENT vii SUMMARY ix PART I: INTRODUCTION 1 Background 1 Purpose and Scope 2 PART II: TEST PROGRAM 3 Purpose of the Program 3 Load-Deflection Tests-3 Rigid-Obstacle Tests -4 PART III: MATHEMATICAL MODEL.-9 Basic Idea -9 Division into Segments 11 Calculation of Segment Spring Coefficients-13 Segment Displacement Functions 17 PART IV: APPLICATION TO TRAVERSAL OF RIGID OBSTACLES-20 Obstacle Test Simulation -20 Computer Implementation.-25 Comparison of Computed and Observed Results-34 PART V: CONCLUSIONS AND RECOMMENDATIONS-36 Conclusions -36 Recommendations-36 LITERATURE CITED-37 PLATES 1-7 APPENDIX A: COMPUTATION OF EFFECTIVE RADIAL DEFLECTION-
dc.format.extent69 pgs / 3.555Mb-
dc.publisherU.S. Army Engineer Waterways Experiment Stationen_US
dc.relation.ispartofseriesTechnical Report (U.S. Army Engineer Waterways Experiment Station);no. M-68-1 rept.1-
dc.rightsApproved for public release; distribution is unlimited-
dc.sourceThe ERDC Library created this digital resource using one or more of the following: Zeta TS-0995, Zeutcehl OS 12000, HP HD Pro 42-in. map scanner, Epson flatbed-
dc.subjectTires--Mathematical modelsen_US
dc.subjectVehicles, Military--Dynamicsen_US
dc.subjectMathematical modelsen_US
dc.titleDynamics of Wheeled Vehicles. Report 1, a Mathematical Model for the Traversal of Rigid Obstacles by a Pneumatic Tireen_US
Appears in Collections:Technical Report

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