等效结点力 　单元刚度矩阵的坐标变换 整体刚度矩阵 　边界约束条件的处理 -Equivalent nodal force of element stiffness matrix of the overall stiffness of the coordinate transformation matrix to deal with boundary conditions

等效结点力 　单元刚度矩阵的坐标变换 　　整体刚度矩阵 边界约束条件的处理 -Equivalent nodal force of element stiffness matrix of the overall stiffness of the coordinate transformation matrix to deal with boundary conditions

等效结点力 　　单元刚度矩阵的坐标变换 　整体刚度矩阵 　　边界约束条件的处理 -Equivalent nodal force of element stiffness matrix of the overall stiffness of the coordinate transformation matrix to deal with boundary conditions

运用MATLAB求取结构的特征值以及相对应向量，其中小曲了刚度矩阵和质量矩阵中对角线为零的选项，消除了矩阵的奇异性-Use MATLAB to strike the structure and the corresponding eigenvalues 瘠攀挀琀漀爀, which ditty stiffness and mass matrices in the diagonal zero option, eliminating the singularity of the matrix