摘要
基于分子动力学方法对双壁碳纳米管轴承的移动摩擦特性进行了理论研究。针对双壁碳纳米管轴承的结构和物理模型,使用经验势函数分析了双壁碳纳米管轴承的管间交互作用势和交互作用力。建立碳纳米管轴承移动动力学模型,采用数值模拟方法,研究不同长度、半径和内外纳米管质心相对位移对纳米管轴承移动阻尼系数的影响,并给出双壁碳纳米管轴承移动阻尼系数与长度、半径和质心相对位移的定量关系。
We study the translation friction properties of double-walled carbon nanotubes （DWCNT） beating based on molecular dynamics method. According to the structure and physical model of DWCNT bearing, we analyzed the energy of a single-waUed carbon nanotube, and DWCNT＇s interaction Potential and force between the two tubes by using experience potential function. The translation dynamics model of nanotubes bearing was established. Adopting the numerical simulation method, we studied the influence of different lengths, radiuses and the distances of the centroid on the translation friction of nanotubes bearing. The relationships between the DWCNT bearing＇s translation damping coefficient and its length, radius and the distance of the centroid are given.
出处
《机械科学与技术》
CSCD
北大核心
2008年第6期784-787,共4页
Mechanical Science and Technology for Aerospace Engineering
关键词
双壁碳纳米管轴承
分子动力学
势函数
移动摩擦特性
double-walled carbon nanotubes bearing
molecular dynamics
potential function
translation friction property
