基于EDEM的沥青混合料搅拌均匀性分析
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摘要
为了提高利用离散元EDEM软件分析混合料搅拌均匀性的准确性,采用EDEM软件模拟沥青混合料搅拌过程,分析了8mm粒径集料含量变异系数变化规律。研究结果表明:随着搅拌时间的延长,不同统计比例和不同取样质量下的8mm粒径集料含量的变异系数均有所下降,并呈负幂函数关系;统计数量越少,8mm粒径集料含量变异系数与时间之间的相关系数越高;对于不同取样质量,划分网格尺寸越小,相关系数越高。
In order to improve the analysis accuracy of stirring uniformity of mixture by using discrete element software EDEM,it was used to simulate the mixing process of asphalt mixture,and the variation law of the coefficient variation of the content of 8 mm aggregate was analyzed.The results show that with the increase of stirring time,the coefficient variation of the content of 8 mm aggregate decreases with different statistical proportions and different sampling quality,and shows a negative power function relationship.The smaller the number of statistics,the higher the correlation coefficient between the coefficient variation of the content of 8 mm aggregate and the time.For different sampling qualities,the smaller the mesh size,the higher the correlation coefficient.
In order to improve the analysis accuracy of stirring uniformity of mixture by using discrete element software EDEM,it was used to simulate the mixing process of asphalt mixture,and the variation law of the coefficient variation of the content of 8 mm aggregate was analyzed.The results show that with the increase of stirring time,the coefficient variation of the content of 8 mm aggregate decreases with different statistical proportions and different sampling quality,and shows a negative power function relationship.The smaller the number of statistics,the higher the correlation coefficient between the coefficient variation of the content of 8 mm aggregate and the time.For different sampling qualities,the smaller the mesh size,the higher the correlation coefficient.
引文
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[14]赵悟,王卫中,冯忠绪,等.搅拌机拌臂布置形式优化及试验研究[J].建筑机械,2006,37(6):68-70.
[15]冯忠绪,姚运仕,赵利军,等.搅拌机长宽比的确定方法[J].中国工程机械学报,2004,2(3):300-303.
[16] CHEN J S,ZENG L,YIN J.Discrete Element Method(DEM)Analyses of Hot-Mix Asphalt(HMA)Mixtures Compaction and Internal Structure[J].Advanced Materials Research,2013,8(1):639-640.
[17]张新勇.基于EDEM方法的稳定土搅拌器搅拌过程模拟[D].西安:长安大学,2015.
[18] FERRARIS C F.Concrete Mixing Methods and Concrete Mixers:State of the Art[J].Journal of Research of the National Institute of Standards&Technology,2001,106(2):391-399.
[19] CHARONNAT Y,BEITZEL H.Report:Efficiency of Concrete Mixers Towards Qualification of Mixers[J].Materials and Structures,1997,30(1):28-32.
[20] LIU B,LI Y.Simulation of Effect of Internals on Particulate Mixing and Heat Transfer in Downer Reactor Using Discrete Element Method[J].Powder Technology,2016,297:89-105.
[2]刘洪海,陈克鸿.沥青混合料取样样本容量的确定[J].筑路机械与施工机械化,1998,15(2):8-10.
[3] YAMAMOTO M,ISHIHARA S,KANO J.Evaluation of Particle Density Effect for Mixing Behavior in a Rotating Drum Mixer by DEM Simulation[J].Advanced Powder Technology,2015,27(3):864-870.
[4] SIMONS T A H,BENSMANN S,ZIGAN S,et al.Characterization of Granular Mixing in a Helical Ribbon Blade Blender[J].Powder Technology,2016,293:15-25.
[5] FENG H,PETTINARI M,STANG H.Study of Normal and Shear Material Properties for Viscoelastic Model of Asphalt Mixture by Discrete Element Method[J].Construction and Building Materials,2015,98:366-375.
[6] HUANG K,XU T,LI G,et al.The Feasibility of DEM to Analyze the Temperature Field of Asphalt Mixture[J].Construction&Building Materials,2016,106:592-599.
[7] BASINSKAS G,SAKAI M.Numerical Study of the Mixing Efficiency of a Ribbon Mixer Using the Discrete Element Method[J].Powder Technology,2016,287:380-394.
[8]纪云,刘送永.混凝土搅拌机搅拌性能的离散元分析[J].施工技术,2016,45(12):144-146,153.
[9] XU Y P,CUI L J,REN X X,et al.DEM Simulations on the Heat Conduction in a Particle Mixer[J].Advanced Materials Research,2012,549:908-913.
[10] ALCHIKH-SULAIMAN B,ALIAN M,EIN-MOZAFFARI F,et al.Using the Discrete Element Method to Assess the Mixing of Polydisperse Solid Particles in a Aotary Drum[J].Particuology,2016,25(2):133-140.
[11]孟杰,孟文俊.影响EDEM仿真结果的因素分析[J].机械工程与自动化,2014(6):49-51.
[12]赵利军,冯忠绪,姚运仕,等.搅拌机叶片安装角的确定方法[J].长安大学学报(自然科学版),2006,26(5):99-102.
[13]赵利军,冯忠绪,郑辽远.沥青混合料强制式搅拌机拌臂布置形式的试验研究[J].中国工程机械学报,2008,6(2):23-28.
[14]赵悟,王卫中,冯忠绪,等.搅拌机拌臂布置形式优化及试验研究[J].建筑机械,2006,37(6):68-70.
[15]冯忠绪,姚运仕,赵利军,等.搅拌机长宽比的确定方法[J].中国工程机械学报,2004,2(3):300-303.
[16] CHEN J S,ZENG L,YIN J.Discrete Element Method(DEM)Analyses of Hot-Mix Asphalt(HMA)Mixtures Compaction and Internal Structure[J].Advanced Materials Research,2013,8(1):639-640.
[17]张新勇.基于EDEM方法的稳定土搅拌器搅拌过程模拟[D].西安:长安大学,2015.
[18] FERRARIS C F.Concrete Mixing Methods and Concrete Mixers:State of the Art[J].Journal of Research of the National Institute of Standards&Technology,2001,106(2):391-399.
[19] CHARONNAT Y,BEITZEL H.Report:Efficiency of Concrete Mixers Towards Qualification of Mixers[J].Materials and Structures,1997,30(1):28-32.
[20] LIU B,LI Y.Simulation of Effect of Internals on Particulate Mixing and Heat Transfer in Downer Reactor Using Discrete Element Method[J].Powder Technology,2016,297:89-105.
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