College of Water Conservancy&Civil Engineering;
China Agricultural University;
School of Engineering;
Peking University;
Department of Engineering Mechanics School of Aerospace;
Tsinghua University;
Key Laboratory of Applied Mechanics&High Performance Computing Center;
School of Aerospace;
Tsinghua University;
characteristic equation solution strategy; fundamental analytical solution; modified Papkovich-Neuber solution; HU Hai-chang solution; analytical trial function;