A simple approach for determining the eigenvalues of the fourth-order Sturm-Liouville problem with variable coefficients
A simple approach for determining the eigenvalues of the fourth-order Sturm-Liouville problem with variable coefficients
复制标题
确定变系数四阶 Sturm-Liouville 问题特征值的简单方法
DOI:
10.1016/j.aml.2013.02.004
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发表时间:
2013-07
影响因子:
3.7
通讯作者:
Luo, Qi-Zhi
中科院分区:
文献类型:
--
作者:
Huang, Yong;Chen, Jian;Luo, Qi-Zhi
In this paper, a simple and efficient approach is presented to compute the eigenvalues of the fourth-order Sturm–Liouville equations with variable coefficients. By transforming the governing differential equation to a system of algebraic equation, we can get the corresponding polynomial characteristic equations for kinds of boundary conditions based on the polynomial expansion and integral technique. Moreover, the lower and higher-order eigenvalues can be determined simultaneously from the multi-roots. Several examples for estimating eigenvalues are given. The convergence and effectiveness of the method are confirmed by comparing numerical results with the exact and other existing numerical results.
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