螺带式混凝土搅拌机混合特性及DEM模拟

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廖泽楚¹，高伟^1,2*，刘磊³，姜胜强¹，谭援强⁴

1. 湘潭大学机械工程学院，湖南湘潭 4111052. 广东工业大学机电工程学院，广东广州 5100063. 深圳市英威腾交通技术有限公司，广东深圳 5180004. 华侨大学制造工程研究院，福建厦门 361021

收稿日期:2018-10-24修回日期:2018-12-01出版日期:2019-08-22发布日期:2019-08-15
通讯作者:高伟

基金资助:基于复杂形状离散元/有限元的砂卵地层盾构仿真方法与实验研究;基于离散元/有限元耦合的高压辊磨粉碎仿真方法与实验研究;基于DEM/FEM的汽车夹层玻璃冲击破坏特性研究

Mixing efficiency of a concrete ribbon mixer and DEM simulation

Zechu LIAO¹, Wei GAO^1,2*, Lei LIU³, Shengqiang JIANG¹, Yuanqiang TAN⁴

1. School of Mechanical Engineering, Xiangtan University, Xiangtan, Hunan 411105, China2. School of Electro-mechanical Engineering, Guangdong University of Technology, Guangzhou, Guangdong 510006, China3. Shenzhen Invt Transportation System Company Limited, Shenzhen, Guangdong 518000, China4. Institute of Manufacturing Engineering, Huaqiao University, Xiamen, Fujian 361021, China

Received:2018-10-24Revised:2018-12-01Online:2019-08-22Published:2019-08-15

摘要/Abstract

摘要： 采用离散单元法模拟新拌混凝土于搅拌机中的混合过程，研究了双筒螺带式混凝土搅拌机的混合效率。用Hertz-Mindlin with JKR接触方法建立新拌混凝土离散元模型，模拟了坍落度实验、L箱实验和流变仪实验，将模拟结果与实验结果进行对比，校准模型参数，采用混合系数定量研究了不同初始装填方式下搅拌机的混合效率。结果表明，采用上下装填方式时搅拌机混合效率较高；对任一初始装填方式，左部区域与右部区域、前部区域与后部区域间混合效率无明显差别，而上部区域混合效率比底部区域高，底部出料口处存在搅拌盲区，采用舍弃初始出料的方法可提高新拌混凝土性能。转速较高时混合效率较高，相同旋转圈数时，混合效率基本相同。

引用本文

廖泽楚高伟刘磊姜胜强谭援强. 螺带式混凝土搅拌机混合特性及DEM模拟[J]. 过程工程学报, 2019, 19(4): 668-675.
Zechu LIAO Wei GAO Lei LIU Shengqiang JIANG Yuanqiang TAN. Mixing efficiency of a concrete ribbon mixer and DEM simulation[J]. Chin. J. Process Eng., 2019, 19(4): 668-675.

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