[1]孙巍巍,张园,孟少平,等.基于三维离散单元法的大直径浅圆仓偏心卸料研究[J].南京理工大学学报(自然科学版),2014,38(03):414.
 Sun Weiwei,Zhang Yuan,Meng Shaoping,et al.Eccentric discharge of large diameter squat silos based on threedimensional discrete element method[J].Journal of Nanjing University of Science and Technology,2014,38(03):414.
点击复制

基于三维离散单元法的大直径浅圆仓偏心卸料研究
分享到:

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

卷:
38卷
期数:
2014年03期
页码:
414
栏目:
出版日期:
2014-06-30

文章信息/Info

Title:
Eccentric discharge of large diameter squat silos based on threedimensional discrete element method
作者:
孙巍巍1张园1孟少平2秦枭1
1.南京理工大学 理学院,江苏 南京 210094;2.东南大学 RC/PC结构教育部重点实验室,江苏 南京 210096
Author(s):
Sun Weiwei1Zhang Yuan1Meng Shaoping2Qin Xiao1
1.School of Sciences,NUST,Nanjing 210094,China; 2.The Key Lab on RC/PC Structures of Ministry of Education,Southeast University,Nanjing 210096,China
关键词:
三维离散单元法大直径浅圆仓偏心卸料仓壁球形颗粒粒状物料墙单元颗粒速度场静态侧压力动态侧压力
Keywords:
threedimensional discrete element methodlarge diameter squat siloseccentric dischargewallsspherical particlesgranular materialwall elementsparticle velocity fieldsstatic lateral pressuredynamic lateral pressure
分类号:
TU375
摘要:
为探讨大直径浅圆仓内粒状物料对仓壁的动态作用机理,采用三维离散单元法模拟了筒仓偏心卸料的全过程。不同尺寸的球形颗粒用于模拟仓内粒状物料,墙单元用于模拟筒仓仓壁。颗粒速度场和颗粒流动过程表明卸料通道自卸料孔向上方延伸呈漏斗状,与模拟实验结果相一致。随着偏心卸料的进行,仓壁静态侧压力不断减小,仓壁动态侧压力峰值出现在卸料的初始阶段,筒仓上部的超压现象比下部更为明显。靠近卸料孔一侧墙体更容易出现超压现象,最大超压系数为1.63,远离卸料孔一侧的仓壁在卸料阶段几乎不出现动态作用。
Abstract:
In order to study the dynamic action mechanism of granular materials to the walls of large diameter squat silos,the whole eccentric discharge processes of a silo are simulated by the threedimensional discrete element method(DEM).Spherical particles of different sizes are used to simulate granular material,and wall elements are used to simulate the silo wall.The particle velocity fields and flow processes of particles show that a funnel shaped discharge channel extends upward from the silo outlet,which is validated by simulation tests.The static lateral pressure to the silo wall decreases continuously during the discharge processes.The peak value of dynamic lateral pressure to the silo wall occurs in the initial stage of the discharge process,and the overpressure of the upper wall is more serious than that of the lower wall.The overpressure phenomena often occur in the side near the silo outlet,and the maximum overpressure coefficient is 1.63.The dynamic action of the wall far away from the outlet may be neglected in the eccentric discharge processes.

参考文献/References:

[1]Dogangun A,Karaca Z,Durmus A,et al.Cause of damage and failures in silo structures[J].Journal of Performance of Constructed Facilities,2009,23(2):65-71.
[2]EN 1991-4-2006.Eurocode 1:Actions on tructures—part 4:Silos and tanks[S].
[3]AS3774-1996.Loads on bulk solids containers[S].
[4]张翀,舒赣平.落地式钢筒仓卸料的模型试验研究[J].东南大学学报(自然科学版),2009,39(3):531-535.
Zhang Chong,Shu Ganping.Experimental research of groundsupported steel silo model’s discharge[J].Journal of Southeast University(Natural Science Edition),2009,39(3):531-535.
[5]赵军宝.仓壁柱承钢筒仓结构的试验研究[D].杭州:浙江大学建筑工程学院,2007.
[6]Fu Jianbao,Luan Maotian,Yang Qing,et al.Threedimensional finite element analysis of wall pressure on large diameter silos[J].Journal of Convergence Information Technology,2010,5(7):120-128.
[7]Li Yanjie,Xu Yong,Jiang Shengyao.DEM simulations and experiments of pebble flow with monosized spheres[J].Powder Technology,2009,193(3):312-318.
[8]Donze F V,Richefeu V,Magnier S A.Advances in discrete element method applied to soil,rock and concrete mechanics,in:State of the art of geotechnical engineering[J].Electronic Journal of Geotechnical Engineering,2009,8:1-44.
[9]杨洋.水泥熟料多点卸料的离散元法模拟[D].上海:同济大学航空航天与力学学院,2007.
[10]戚晓利,尹晓春,王文,等.多次弹塑性撞击实验系统的设计与数值仿真[J].南京理工大学学报,2012,36(2):202-206.
Qi Xiaoli,Yin Xiaochun,Wang Wen,et al.Design and numerical simulation of experimental system for multiple elasticplastic impacts[J].Journal of Nanjing University of Science and Technology,2012,36(2):202-206.
[11]张磊.曲线挡墙散粒体主动侧压力分析及筒仓实践[D].长沙:中南大学土木工程学院,2009.
[12]GB50077-2003.钢筋混凝土筒仓设计规范[S].

备注/Memo

备注/Memo:
收稿日期:2012-11-24修回日期:2013-01-30
基金项目:国家自然科学基金(51308297);江苏省自然科学基金(BK2011707);国家级大学生科研训练项目
作者简介:孙巍巍(1979-),男,博士,副教授,主要研究方向:混凝土和钢结构,E-mail:sww717@163.com。
引文格式:孙巍巍,张园,孟少平,等.基于三维离散单元法的大直径浅圆仓偏心卸料研究[J].南京理工大学学报,2014,38(3):414-418.
投稿网址:http://zrxuebao.njust.edu.cn
更新日期/Last Update: 2014-06-30