基于离散元的钢轮压实土壤过程仿真分析  

Simulation Analysis on Compaction Performance of Compactor on Soil Using Discrete Elment Method

作　　者：郑艾欣 张志峰[1] 王慧强 陈鹏[3] ZHENG Aixin;ZHANG Zhifeng;WANG Huiqiang;CHEN Peng(Key Laboratory for Highway Construction Technology and Equipment of Ministry of Education,Chang′an University,Xi′an 710064,China;Shaanxi Hande Axle Co.,Ltd.,Xi′an 710064,China;Shantui Construction Machinery Co.,Ltd.,Jining,Shandong 272073,China)

机构地区：[1]长安大学道路施工技术与装备教育部重点实验室,西安710064 [2]陕西汉德车桥有限公司,西安710064 [3]山推工程机械股份有限公司,山东济宁272073

出　　处：《机电工程技术》2020年第2期87-89,共3页Mechanical & Electrical Engineering Technology

摘　　要：分析钢轮压实过程中土壤的应力应变变化规律,对于揭示土壤的压实过程具有非常重要的意义。基于离散元算法建立了压路机的"土壤-钢轮"模型,利用普通球形颗粒填充的方法建立3种形态的土壤颗粒模型,在EDEM中对土壤压实过程进行仿真,研究土体颗粒在钢轮压实过程中的沉降量、孔隙率、颗粒压力的变化过程。仿真结果表明,压实过程中,土壤材料随着压实遍数的增加,沉降量增大、孔隙率减小、颗粒压力增大、土壤压实度逐渐提高。利用离散元分析"钢轮-土壤"的动态相互作用能够用于揭示微观状态下土壤颗粒的受力变形特性。It is very important to analyze the law of soil stress and strain in the process of steel wheel compaction.Based on the discrete element algorithm,the"soil steel wheel"model of roller was established.Three kinds of soil particle models were established by using the method of ordinary spherical particle filling.The process of soil compaction was simulated in edem,and the process of settlement,porosity and particle pressure of soil particles in the process of steel wheel compaction was studied.The simulation results show that in the process of compaction,with the increase of compaction times,the settlement of soil material increases,the porosity decreases,the particle pressure increases,and the degree of soil compaction increases gradually.The dynamic interaction of"steel wheel soil"can be used to reveal the mechanical and deformation characteristics of soil particles in micro state.

关 键 词：压实 土壤压实 土壤-钢轮模型 离散元 

分 类 号：U443[建筑科学—桥梁与隧道工程]