运用Matlab编程，实现了三维结构的凝聚，包括Guyan法，标准凝聚和迭代凝聚法。-With Matlab programming, we achieve the cohesion of the three-dimensional structure, including the Guyan method, standard condensation and iterative condensation method.

Guyan法模型减缩,缩减系统治疗刚度矩阵维数，同时保持低阶模态精确性-Guyan condensaton method

缩减有限元模型自由度，以便提高计算效率和计算精度，确保结果正确。(Reduce the degree of freedom of the finite element model, so as to improve the efficiency and accuracy of calculation, and ensure the correct result.)