简支梁有限元特征值分析计算，计算了前10阶模态和频率，并作图。包含多个文件代码，主要是包括数据输入，边界条件检验，整合整体刚度-Finite Element Analysis feature value calculated simply supported beam, the former 10 calculates modal and frequency, and plotted. Includes a plurality of document codes, mainly includes a data input, the boundary conditions testing, integration of the overall stiffness