三角履带轮移动载荷对地面受力响应仿真研究

Simulation Research on the Dynamic Response of the Wheel Moving Load on the Ground

对三角履带轮移动载荷对地面受力响应进行准确分析,可提升车辆-路面交互作用系统的性能。进行地面受力响应分析时,应根据建立的地面受力响应有限元模型计算最小拉应力,水平和横向拉力和最大剪应力。传统方法通过计算在移动质量和简谐激励作用下完成地面受力响应分析,但不能建立地面受力响应有限元模型,无法计算和地面受力响应的力,存在分析误差大的问题。提出一种基于地面力学理论的三角履带轮移动载荷对地面受力响应分析方法。先融合于三角履带轮与地面相互作用的力学原理获取路面功率谱密度函数,在ABAQUS软件下,组建三角履带轮移动载荷对地面受力响应分析有限元模型,计算出路面各层最小拉应力,及基层和土基层在整个载荷作用中的水平和横向拉力,路面结构仅受垂直力作用和水平力作用下的最大剪应力,利用计算结果完成对三角履带轮移动载荷对地面受力响应分析。仿真结果表明,所提方法能够精确地反映出三角履带轮移动载荷对地面的真实受力状况,为完善车辆-路面交互作用系统的性能提供有力的依据。

In this paper, we proposed an analysis method for ground stress response to moving load of triangular pedrail wheel based on the terramechanies. Firstly, we obtained the power spectral density function of pavement integrated with interactive mechanics principle between triangular pedrail wheel and pavement, and built the finite element model of ground stress response under the ABAQUS software. Then, we worked out the minimum tensile stress of each pavement layer, horizontal and transverse tension of substratum and soil substratum under overall loading effect, and maximum shearing stress of pavement structure under vertical force and horizontal force effect. Finally, we used the computation results to complete the analysis of ground stress response to moving load of triangular pedrail wheel. The simulation results show that the method mentioned above can reflect the real stress state. It can provide some powerful basis for perfecting the property of vehicle - pavement interaction system.