两类润滑剂物性参数和摩擦系数的高通量分子动力学计算  

The Highthroughput Molecular Dynamics Computation of Physical Properties and Friction Coefficient about Two Kinds of Lubricants

作　　者：周峰[1] 鲍路瑶 蔡美荣[1] 刘维民[1] ZHOU Feng;BAO Luyao;CAI Meirong;LIU Weimin(State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Gansu Lanzhou 730000,China)

机构地区：[1]中国科学院兰州化学物理研究所固体润滑国家重点实验室,甘肃兰州730000

出　　处：《摩擦学学报》2021年第3期404-413,共10页Tribology

基　　金：国家重点研发计划(2018YFB0703800)资助。

摘　　要：提出了离子液体和酯类化合物两类润滑剂物性参数和摩擦系数的高通量分子动力学计算框架,建立了通过分子几何拓扑结构-力场参数分配-分子模型构建-参数计算的全流程高通量方法,利用充足的计算资源,可以实现万级规模的高通量并发计算.创新性地提出了两层高通量并发-并行算法:第一层将润滑剂库分块,每一块并发计算;第二层单个润滑剂采用多CPU并行计算,大大提高了计算效率.以离子液体为例测试了高通量算法和代码,最大进行了100级高通量计算,结果表明,该高通量算法具有很好的稳定性和计算效率,得到的物性参数和摩擦系数与实验值相吻合.The upgrading of the manufacturing industry puts forward higher requirements on the supply and quality of existing lubricants.The demand for lubricants inevitably tends to be individualized,differentiated and diversified.The research and development speed and quality of lubricants in China lag behind market demand.In response to the future market’s requirements for materials,the United States put forward the material genome plan in 2011,and China also put forward its own material genome plan.The main core goal of the Material Genome Project is to shorten the research and development cycle by half and reduce the cost of research and development by half,which will greatly promote the speed and efficiency of the research and development of new materials.It has important strategic significance for China to get out of the predicament of insufficient lubricant research and development.The material gene project will rely on high-throughput computing methods and computing resources to achieve its goals in order to realize the rational design of materials.In recent years,a large number of high-throughput computation studies of materials have been carried out in China,but the high-throughput computation of lubricating materials is still blank.A high-throughput molecular dynamics computation framework for liquid lubricants is proposed for ionic liquids and ester compounds.Ionic liquids and ester compounds are the two main types of lubricants,so the currently generated molecular model library contains these two types of lubricants,and other types of lubricants can be easily added under the existing framework.The starting point for generating the molecular model library is to obtain the simplified molecular input line entry specification(SMILES)string of the functional groups of the ionic liquid anion,cation and ester compounds.Although there are many ionic liquids and ester compounds with different molecular structures,the number of functional groups is very limited and can be easily obtained from existing chemical librari

关 键 词：高通量计算 分子动力学 离子液体 酯类化合物 物性参数 摩擦系数 

分 类 号：TH117.22[机械工程—机械设计及理论]