以碳纳米管的Euler-Bernoulli梁理论建立的四阶偏微分方程为计算模型,通过简谐振动假设得到碳纳米管的模态分析方程.采用重心Lagrange插值近似未知模态函数,将模态分析方程和边界条件离散为代数方程,施加边界条件求解代数特征值方程,得到碳纳米管在不同边界条件下的自由振动频率.数值计算结果与文献报道结果比较表明所提方法的有效性和计算精度.
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