منابع مشابه
Toward Establishing a Comprehensive Pressure-sinkage Model for Small Diameter Wheels on Deformable Terrains
Traditional terramechanics theorems utilise pressure-sinkage models based on the assumption that the contact area between a tyre and soil can be approximated as a flat plate. Examples include work by Bekker, Reece, and Ishigami. Recently, the authors have demonstrated that 1) this approximation does not hold for wheels with a diameter less than approximately 50 cm and 2) an improved diameter-de...
متن کاملA New Pressure-Sinkage Model for Small, Rigid Wheels on Deformable Terrains
In the 1960s, Bekker developed the formulae that constitute the core of terramechanics. These semi-empirically derived equations allow the designers of large vehicles to understand and predict vehicle mobility performance over deformable terrains. In recent years, researchers have questioned the accuracy with which Bekker theory can be applied to smaller vehicles. Specifically, Bekker theory is...
متن کاملResistance distance in wheels and fans
Abstract: The wheel graph is the join of a single vertex and a cycle, while the fan graph is the join of a single vertex and a path. The resistance distance between any two vertices of a wheel and a fan are obtained. The resistances are related to Fibonacci numbers and generalized Fibonacci numbers. The derivation is based on evaluating determinants of submatrices of the Laplacian matrix. A com...
متن کاملInvestigation and Evaluation of Rolling Resistance Prediction Models for Pneumatic Tires of Agricultural Vehicles
Wheel numeric and different versions of mobility numbers are important models for predicting the rolling resistance. In this study, data related to the rolling resistance of cross ply and radial ply tires were compared with the resultant values from several models. Also, the preciseness of models in rolling resistance prediction was evaluated. For this purpose F test and 1-1 line method (p≥ 0.0...
متن کاملWheelchair tire rolling resistance and fatigue.
The hysteresis loss theory of rolling resistance is developed for solid rubber wheelchair tires. The analysis is used to correlate test data for a clay-filled natural rubber and a polyurethane tire material. A discussion of tire rolling work, hysteresis loss factor measurement, and rolling loss measurement is presented. An example calculation of rolling resistance for a polyurethane tire is giv...
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ژورنال
عنوان ژورنال: Progress in Agricultural Engineering Sciences
سال: 2015
ISSN: 1786-335X,1787-0321
DOI: 10.1556/446.11.2015.3