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一种提高短程作用的快速分子动力学方法

A fast molecular dynamics method with short-range interaction
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摘要 针对短程作用势自身的计算消耗,提出了一种提高分子动力学计算效率的方法:离散势函数与插值相结合的方法.这种方法的基本思想是忽略具体的函数形式,在初始化阶段制作原子之间的相互作用力和能量的列表,具体计算时采用先查表后插值的方式以节省时间.使用Lennard-Jones势对NVE下Ar原子系统进行了模拟,验证了此方法的正确性和有效性,发现此方法可以提高计算速度近1倍.而且通过对NaC l晶体的模拟,说明了越复杂的势函数,这种方法提高的效率越多. A kind of fast molecular dynamics (MD) technique combining the advantages of discrete potential function and interpolation is proposed to reduce the calculation cost of short-range interactions. Compared with classical method, this presented algorithm shows high efficiency with little error. Ignored the specific inter-atomic potential, it utilizes tables to speed up the determination of forces and potentials. In order to verify the validity and the correctness of the calculation method, the argon atom systems of liquid state as microensemble was performed with Lennard-Jones potential function. It was found that this method can make MD calculation quick about 1 times.
作者 崔志伟 孙毅
出处 《哈尔滨工业大学学报》 EI CAS CSCD 北大核心 2008年第3期345-349,共5页 Journal of Harbin Institute of Technology
基金 国家自然科学基金资助项目(10472028) 黑龙江省杰出青年基金资助项目 哈尔滨工业大学交叉学科基金项目(HIT.MD2002.05)
关键词 分子动力学 离散势函数 插值 molecular dynamics discrete potential function interpolation
作者简介 崔志伟(1980-),男,教授,博士研究生; E-mail:sunyi@ hit. edu. cn孙毅(1961-),男,教授,博士生导师.
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