摘要
随着国家对工程机械节能增效的要求越来越高,减少工程机械作业阻力是节能增效的核心技术之一。土壤作为工程机械作业的典型工况,很有必要对其物理参数进行深入研究,而土壤的滚动摩擦系数对其宏观性能有着显著的影响。现有滚动摩擦系数的测量方法并不适用土壤颗粒,论文设置了一套土壤滚动摩擦系数测量装置,可以很好的避免土壤颗粒在测试时发生破碎,并可获得足量的实测数据,通过SPC方法处理测试数据呈正态分布并满足稳定性要求。经过测量计算得到土壤颗粒-土壤颗粒之间的滚动摩擦系数为:0.045,土壤颗粒-钢之间的滚动摩擦系数为:0.033。把测得的系数设置到离散元模型(JKR模型)中,得到虚拟土壤安息角,并与实测的土壤安息角进行对比,偏差在1.7%以内,表明测量装置设计合理,测量结果准确,满足工程要求,为后续工程机械降低作业阻力研究打下坚实的基础。
As the country more and more high to the requirement of engineering mechanical energy conservation and efficiency,reduce the work resistance of engineering machinery is one of the core technology of energy saving and efficiency increasing.soil as typical working conditions of the engineering machinery operation,it is necessary to make in-depth study on its physical pa-rameters,and the rolling friction coefficient of soil has obvious effects on the macroscopic properties.The existing measurement method of rolling friction coefficient is not suitable for soil particles.A set of soil rolling friction coefficient measurement device is set up,which can well avoid soil particles breaking during the test and obtain sufficient measured data.The test data are normal-ly distributed and meet the stability requirements through SPC.After measurement and calculation,the rolling friction coefficient between soil particles and soil particles is 0.045,and the rolling friction coefficient between soil particles and steel is 0.033.The measured coefficients were set into the discrete element model(JKR model)to obtain the virtual soil repose Angle,and compared with the measured soil repose Angle,the deviation was less than 1.7%,It shows that the design of measuring device is reasonable and the measurement results are accurate,which can meet the engineering requirements and serve for the research on reducing work resistance of construction machinery.
作者
李贝
黄遂
陈羽
谌炎辉
LI Bei;HUANG Sui;CHEN Yu;CHEN Yan-hui(School of Automotive Engineering,Liuzhou Vocational&Technical College,Guangxi Liuzhou 545006,China;Guangxi Liugong Machinery Co.,Ltd.,Guangxi Liuzhou 545007,China;School of Mechanical and Automotive Engineering,Guangxi University of Science and technology,Guangxi Liuzhou 545000,China)
出处
《机械设计与制造》
北大核心
2024年第3期53-56,共4页
Machinery Design & Manufacture
基金
广西科学研究与技术开发计划项目(桂科AC16380032)
柳州职业技术学院2020年度课题(2020KA01)
柳州市重大专项(2017AB10103)。
关键词
工程机械
土壤颗粒
滚动摩擦系数
SPC
离散元
安息角
Engineering Mechanical
Soil Particle
Rolling Friction Coefficient
SPC
DEM
Repose Angle
