Powered Wheels in the Turned Mode Operating on Yielding Soils
Powered Wheels in the Turned Mode Operating on Yielding Soils
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DOI：
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发表时间：
1976-09
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通讯作者：
G. N. Durham
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文献类型：
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作者：
G. N. Durham
摘要：本报告总结了有关在转向模式下运行的单个充气轮胎动力轮的性能的研究，以及用分析关系和动力学方程表述研究结果，以预测在软土上运行的四轮车辆的性能以及在理想稳态运动下进行平坦水平转向。在实验室中，使用 6.00-9 轮胎，在接近饱和的粘土和风干的沙子上进行了 72 次单程测试。车轮转动角度为0、5、10、15和20度；垂直轮载荷从 1000 到 4000 N 不等；轮胎挠度分别为未挠度轮胎断面高度的0.15、0.25和0.35。粘土经过加工并放置在软稠度下，具有 290 kPa 的锥入阻力。风干砂的相对密度从松散到中等，相应的锥入度梯度为2.0和3. 2 MPa/m。动力轮的性能用拉力系数、侧向力系数、所需输入扭矩系数、下沉系数和车轮滑移来表示，受以下自变量的影响：土壤强度、轮胎偏转和几何形状、车轮负载和车轮转向角。
Abstract : This report summarizes research concerned with the performance of single, pneumatic-tired, powered wheels operating in the turned mode and the formulation of the findings with analytical relations and dynamical equations for predicting the performance of four wheeled vehicles operating on soft soils and negotiating a flat horizontal turn under ideal steady-state motion. Seventy-two single pass tests were conducted in the laboratory on a near saturated clay and an air-dry sand with a 6.00-9 tire. Wheel turn angles were 0, 5, 10, 15, and 20 degrees; vertical wheel loads varied from 1000 to 4000 N; and tire deflections were 0.15, 0.25, and 0.35 of the undeflected tire section height. The clay was processed and placed at a soft consistency having a cone penetration resistance of 290 kPa. Relative density of the air-dry sand ranged from loose to medium with corresponding cone penetration gradients of 2.0 and 3. 2 MPa/m. Performance of the powered wheel was expressed in terms of pull force coefficient, side force coefficient, required input torque coefficient, sinkage coefficient, and wheel slip as influenced by the following independent variables: soil strength, tire deflection and geometry, wheel load, and wheel turn angle.