斗轮堆取料机塌料工况下挖掘阻力的EDEM仿真  

EDEM simulation of excavation resistance of bucket wheel stacker and reclaimer under material collapse condition

作　　者：郑培[1] 宋文绯 胡雄[1] Zheng Pei;Song Wenfei;Hu Xiong(Logistics Engineering College,Shanghai Maritime University,Shanghai 201306)

机构地区：[1]上海海事大学物流工程学院

出　　处：《烧结球团》2019年第6期50-54,共5页Sintering and Pelletizing

基　　金：国家863计划资助项目(2013A20411606);国家自然科学基金资助项目(31300783);中国博士后科学基金资助项目(2014M561458)

摘　　要：斗轮堆取料机在作业时常常因物料坍塌而产生冲击载荷,影响整机结构的稳定性。针对这一现象,根据斗轮堆取料机在实际作业中出现的塌料工况,通过研究斗轮三维模型,结合离散单元法,建立斗轮挖掘EDEM仿真模型;计算多个铲斗在物料坍塌过程中,不同深埋情况下、不同方向上的挖掘阻力时程曲线,对比设计规范中斗轮挖掘阻力的计算数值,评估不同深埋状态下最大挖掘阻力的危害。结果表明:塌料工况下的挖掘阻力,随着斗轮被埋铲斗数以及被埋深度的增加而呈指数增加。仿真研究可为今后这类特殊危害工况下,斗轮机上部回转重心、整机结构稳定性以及大冲击疲劳损伤提供更加完整、全面、可靠的分析。During the operation of bucket wheel machine,impact load is often generated due to material collapse,which affects the stability of the whole structure.In view of this phenomenon,according to the material collapse condition of bucket wheel stacker reclaimer in the actual operation,through research of the three-dimensional model of the bucket wheel and in combination with the discrete element method,the EDEM simulation model of the bucket wheel is established.The time-history curves of bucket wheel excavation resistance in different directions under different deep buried conditions in the process of material collapse are calculated,the calculated values of bucket wheel excavation resistance in the design specification are compared and the harm of maximum excavation resistance under different deep buried conditions are evaluated.The results show that,the digging resistance increases exponentially with the increase of the number and depth of the buried bucket wheel under collapse working condition.The simulation research provides a more complete,comprehensive and reliable analysis for the upper rotating center of bucket wheel machine,the structural stability of the whole machine and the large impact fatigue damage analysis under such special hazardous conditions in the future.

关 键 词：斗轮堆取料机 危害工况 挖掘阻力 EDEM 散体力学 

分 类 号：TH246[机械工程—机械制造及自动化] TP391.9[自动化与计算机技术—计算机应用技术]