煤粒冲击粉碎临界速度的数值实验分析  

Numerical analysis for critical speed of coal impacting and comminution

作　　者：李艳焕[1] 邵良杉[1] 徐振亮[2] 

机构地区：[1]辽宁工程技术大学工商管理学院,辽宁阜新123009 [2]中国资源卫星应用中心,北京100094

出　　处：《振动与冲击》2017年第5期227-230,共4页Journal of Vibration and Shock

基　　金：国家自然科学基金(71371091)

摘　　要：基于弹性碰撞动力学模型(Hamilton变分原理),应用显式算法有限元程序LS-DYNA对煤粒冲击刚性靶板粉碎进行了数值模拟研究,得到了煤粒冲击粉碎的临界速度在10m/s左右,证明了煤粒在低速冲击粉碎过程中存在压力释放效应,继而拓宽了显式动力有限元程序LS-DYNA分析弹塑性材料冲击粉碎问题的应用领域。数值模拟结果对于认识煤粒及其他物料冲击粉碎机理、研制高效粉碎设备具有较好的指导意义和参考价值。The coal impacting a rigid targetplate and comminution was simulated using the finite element software LS-DYNA with an explicit algorithm based on the dynamic model of elastic collision （Hamilton variation principle） . The results showed that the critical speed of the coal impacting and comminution is about 10 m/s, there is the release effect of pressure in the coal impacting and comminution at a lower speed; field of the finite element software LS-DYNA for analyzing of elastic-plastic materials is extended. The simulation results provided a guidance and a reference for understanding the impacting and comminution mechanism of coal and other materials and manufacturing effective comminuting equipments.

关 键 词：LS-DYNA 有限元 冲击粉碎 接触-碰撞 临界速度 数值模拟 

分 类 号：TD-05[矿业工程]