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本文根据车辆与地面相互作用的特殊工况,提出了一种新的地面车辆力学的数学模型,用以分析车辆和土壤的相互作用。模型考虑了车辆与地面相互作用的应力路径、加载速度等因素,在经过改装的常规三轴仪上得出不同土壤的应力—应变关系。此数学模型作为一个完整的模块并入大型非线性有限元程序(NFAP)中。所进行的计算表明,该模型较土工中的Drucker-Prager模型更适用于地面车辆力学的研究,而且与试验值有令人满意的一致性。
In this paper, a new mathematical model of ground vehicle mechanics is proposed to analyze the interaction between vehicle and soil according to the special conditions of interaction between the vehicle and the ground. The model considers the stress path, loading speed and other factors that the vehicle interacts with the ground. On the modified conventional triaxial apparatus, the stress-strain relationship of different soils is obtained. This mathematical model is incorporated as a complete module into a large nonlinear finite element program (NFAP). The calculations made show that the model is more suitable for ground vehicle mechanics than the Drucker-Prager model in geotechnical engineering, and has a satisfactory agreement with the experimental values.