物料颗粒参数对大型矿用挖掘机挖掘阻力影响的仿真研究  

Simulation and study on influence of material particle parameters on excavating resistance of large mining excavator

作　　者：孙伟[1] 孔翔 宋学官 李二洋 

机构地区：[1]大连理工大学机械工程学院,辽宁大连116024

出　　处：《矿山机械》2018年第2期18-24,共7页Mining & Processing Equipment

基　　金：适应复杂工况的重大工程装备多学科协同设计(U1608256)

摘　　要：为了探究离散元法应用中物料颗粒参数对大型矿用挖掘机挖掘阻力及仿真时间的影响,建立了WK-55型大型矿用挖掘机的挖掘仿真模型,从挖掘机挖掘的仿真时间、仿真结果的稳定性和挖掘阻力几个方面进行分析,分别探究了颗粒尺寸、密度、恢复系数、剪切模量、摩擦因数和表面能对挖掘仿真的影响,得到了各参数对挖掘阻力的影响规律。结果表明,适当地减小剪切模量可以在保证不影响挖掘阻力的前提下有效节约仿真时间,为后续的大型矿用挖掘机工作装置离散元仿真模型的简化提供了依据。In order to explore the influence of material particle parameters on the excavating resistance and simulation time of the large mining excavator during the application of DEM（Discrete Element Method）, the paper established the excavating simulation model of WK-55 mining excavator, and analyzed the excavating simulation from the simulation duration, the stability of simulation results and the excavating resistance. It respectively studied the influence of particle size, density, recovery coefficient, shearing modulus, friction coefficient and surface energy on the excavating simulation, and obtained the influence laws of each parameter on the excavating resistance. The results showed the appropriate reduction of the shearing modulus effectively saved the simulation duration on the premise of keeping the excavating resistance unchanged, which offered reference for the simplification of the discrete element simulation model of the working device of the large mining excavator.

关 键 词：离散元法 大型矿用挖掘机 物料颗粒 挖掘阻力 

分 类 号：TD422.2[矿业工程—矿山机电]