基于颗粒流程序的ATB-30下面层细观响应研究

发布时间：2019-03-25 15:11

【摘要】：为了研究ATB-30下面层在荷载作用下的细观响应,利用颗粒流程序生成ATB-30下面层的细观模型,在施加标准轴载后,追踪了细观模型颗粒间接触力的演化、不同位置处颗粒的位移。模拟结果表明:颗粒间接触力的大小不同、延伸方向各异,较大的颗粒间形成较大的接触力,施加荷载前模型的最大接触力为7.051×104 N;荷载作用后,ATB-30细观模型的最大接触力为1.393×105 N,比未施加荷载时增加了约1.98倍,接触力的分布在轮胎下方较密集,且接触力较大;沿深度方向颗粒的位移逐渐减小,两轮轮隙处颗粒的位移明显小于左右轮中间处的颗粒,并且左右轮中间处颗粒产生的位移相差不大,最大差异出现在深度为0.04cm处,两者仅相差0.28mm。
[Abstract]:In order to study the mesoscopic response of the lower layer of ATB-30 under load, the mesoscopic model of the lower layer of ATB-30 is generated by the particle flow program. After the standard axial load is applied, the evolution of the indirect contact force of the particle in the mesoscopic model is tracked. Displacement of particles at different locations. The simulation results show that the size of indirect contact force of particles is different, the extension direction is different, the larger particles form a larger contact force, the maximum contact force of the model before loading is 7.051 脳 10 ~ 4 N; After loading, the maximum contact force of the ATB-30 mesoscopic model is 1.393 脳 10 ~ 5 N, which is about 1.98 times higher than that of the non-loading model. The distribution of the contact force is denser under the tire, and the contact force is larger. The displacement of particles in the depth direction decreases gradually, the displacement of particles in the gap between the two wheels is obviously smaller than that in the middle of the left and right wheels, and the displacement produced by the particles in the middle of the left and right wheels is not much different, and the maximum difference appears at the depth of 0.04cm. The difference between them is only 0.28 mm.
【作者单位】：长安大学公路学院;内蒙古路桥有限责任公司;
【基金】：中国博士后科学基金(2014M550476) 国家自然科学基金(51408047)
【分类号】：U416.2

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