Spectrum interpolation method is obtained by use of approximationinterpolation, from algorithm comparison of discrete system matrix, and some useful results are obtained.
从离散系统状态转移矩阵的算法比较方面。借助逼近插值给出频谱插值法，结果较为实用。
2
The meshing stiffness is calculated by employing 3-dimensional FEM and its function is formed by cubic spline interpolation and approximation of the discrete mesh points in a mesh period.