车轮重复通过对沙土力学特性影响及参数预测

根据重复加载不改变沙土的极限承载能力以及重复通过时作用在车轮上的土壤推力基本不变的试验结果,借助于MGBekker建立的“压力—沉陷”和“剪切一位移”方程,提出了车轮重复通过条件下的沙土承压及剪切特性参数的预测方法。由于综合考虑了车轮重复通过对沙土承压及剪切特性的影响,应用文中提出的方法可更准确地模拟多轴轮式车辆在沙土上的牵引通过性能以及各轮轴的实际受力情况。

Effect of Wheel Multi-pass on the Sand Mechnical Properties and its Parameters Prediction

Based on the experimenal results that repeat-loading has no influence on the bearing-capacity of sand and that sand thrust acting on wheel keeps unchanged during the wheel multi-passing on it, and with Bekker' s "pressure-sinkage" and "shear-displacement" equations, a method is presented in this paper, by which the parameters of "pressure-sinkage" and "shear-displacement" properties of sand under multi-pass condition can be determined. Therefore the tractive performance of wheeled vehicle on sand can be predicted more accurately by taking account of the effect of wheel multi-pass on the sand properties of "pressure-sinkage" and "shear-displacement".