MT-1620 al.2002 Can find k b k1 calculating [C]] first, then inverting (1)*minor of determinant of [Cil Note: k may be singular (indicates "rigid body" modes -- rotation > translation etc calculating [k-l] directly from individual local [k-i] elements and adding up for the total system Most convenient way Note: This latter method is the basis for finite element methods Paul A Lagace @2001 Unit 21-15MIT - 16.20 Fall, 2002 --> Can find kij by: • calculating [Cij] first, then inverting + ( ) −1 ij minor of k ij = ∆ Cij determinant of [Cij] Note: k-1 may be singular (indicates “rigid body” modes) --> rotation --> translation --> etc. • calculating [kij] directly from individual local [kij] elements and adding up for the total system Most convenient way Note: This latter method is the basis for finite element methods Paul A. Lagace © 2001 Unit 21 - 15