模态叠加法M程序

代码说明：

利用模态叠加法的matlab 程序%========【description of basic varables】========%% node -------- matrix of node information% knode -------- matrix of key note information% element --------- matrix of element information% material -------- matrix of material information% K -------- matrix of entire stiffness% M -------- matrix of entire mass% dm -------- matrix of damage information% dm_number -------- number of damaged elements% node_number -------- number of nodes% element_number -------- number of elements% bc_number -------- number of constraint% bc -------- matrix of boundary constraint information% f -------- eigenvalue of structure % A -------- eigenvector of structure% mode -------- number of modes considered