摘要
采用微梁单元等效C—C键的作用效果建立两端固定约束的（10，10）扶椅型单臂碳纳米管有限元计算模型，通过数值模拟分别得出初始间隙为2nm、3nm时的碳纳米管的吸合电压；另外，还得出预应力情况下碳纳米管的振动频率与振型，结果发现，得到的吸合电压高于由分子动力学模拟得到的吸合电压；在6V电压下出现了预应力“软化”效应，第一阶呼吸振型为非对称振型。
Established the finite element model of a double-clamped（10,10）SWCNT. Numerical simulations were carried out to obtain the pull-in voltages of CNT with initial gaps of 2nm and 3nm, respectively. In addition, the structure vibration frequency and mode with prestress effect were also obtained. Comparing to the results of molecular dynamic simulations, the pull-in voltage obtained by this paper is higher. The results also show that under 6 voltage, the soften effect of prestress appears and the first order breathing-mode is unsymmetrical.
基金
中央高校基本科研业务费资助项目（ZYGX2009J079）
关键词
单臂碳纳米管
微梁单元
吸合电压
预应力
single-walled carbon nanotube
micro-beam element
pull-in vohage
prestress
