基于胎/路啮合作用的纹理化路面行车稳定性分析

为了给隧道水泥混凝土路面纹理设计提供指导,对路面进行纹理化参数设计试验,并以此来保证行车的稳定性,减少隧道行车的横向摆振效应。由于目前水泥混凝土路面纹理参数设计理论缺乏相应的依据,在分析轮胎与粗糙路面接触作用的基础上,基于压力胶片测试技术考虑胎/路啮合特性对车辆轮胎的转向阻力矩计算方法进行了优化。通过依托项目的隧道纹理化路面和室内试验,对四种不同路面的轮胎接触特性进行分析,提出一种基于实际测量的胎/路接触应力分布的原地转向阻力矩评价方法。结果表明:根据实测的轮胎接触应力计算得出汽车轮胎转向阻力矩,可有效地表征轮胎的转向阻力矩状态;纹理化水泥混凝土路面汽车转向阻力矩比沥青路面上高10%～20%,加之纹理化构造与轮胎纵向沟槽的啮合作用产生较大的侧向力矩,导致纹理化路面的行车稳定性较差;通过设置一定的刀组间距进而干涉轮胎与道路的接触界面,最终达到降低轮胎转向阻力矩的目的。

Stability Analysis of Textured Pavement Based on Tire/Road Meshing Effect

In order to provide guidance for the design of tunnel cement concrete pavement texture, the pavement texture parameter design test was carried out to ensure the stability of the driving and reduce the lateral sway effect of the tunnel driving. Aiming at the shortcomings of the current design parameters of cement concrete pavement texture, based on the analysis of the contact effect between tire and rough road surface, the calculation method of steering torque of vehicle tire was optimized based on the pressure film test technology considering the tire/road meshing characteristics. Based on the tunnel texture pavement and laboratory test of the project, the tire contact characteristics of four different pavements were analyzed, and the in situ steering resistance torque evaluation method based on the measured tire/road contact stress distribution was proposed. The results show that the steering resistance torque of the tire based on the measured tire contact stress can effectively characterize the steering resistance torque of the tire. The textured turning resistance of the cement concrete pavement is about 10~20% higher than that of the asphalt pavement. In addition, the meshing effect of the texture and the longitudinal groove of the tire produces a large lateral moment, which results in poor running stability of the textured pavement. By setting a certain distance between the blocks and interfering with the contact interface between the tire and the road, the purpose of reducing the steering resistance torque of the tire is finally achieved.