大履刺履带沉陷性能预测方法研究

Study on Prediction Method of the Sinkage of Track with Big Shoes

地面力学是研究车辆与地面相互作用的边缘学科,履带-地面相互作用是其中较为重要的一个分支。经过对地面力学的研究与总结,发现履带车辆在松软土壤上行驶时,应该采用大履刺履带行走机构,但目前学者们往往忽视了履刺的作用,对履带沉陷性能的研究工作较少。据此提出两种方法:基于贝克理论,应用力学平衡方法,提出松软土壤条件下大履刺履带压力-沉陷的关系式,采用赋值法解决变形系数为非整数时沉陷量的预测问题;基于PFC2D软件,探讨利用离散元法分析大履刺履带沉陷性能的可行性。可为大履刺履带车辆沉陷性能和履带结构参数优化提供理论依据及仿真手段。

Terramechanics is the frontier branch which studies the interaction between vehicle and terrain, and the track- terramechanics is a comparatively important branch among them. The track vehicle should equip the big grouser track when running on the soft soll by research and summary of terramechanics. But the scholars have often ignored the function of grouser at present, and there is less research that is carried on. Two solutions are suggested in this article. Based on the Bekker＇s theory and research approach, the pressure-sinkage expression of large grouser track under the soft soil condition is put forward by applying the balanced method of mechanics. The estimation of sinkage when the deformation coefficient is not integral is resolved by using evaluation method. And the feasibility of studying on the sinkage based DEM is explored, with the PFC2D. The theoretical base and the simulation method are provided for sinkage estimation and parameters optimization of track with large grouser.