User:Eml4500.f08.a-team.melvin/Lecture 10



Applying fixed B.C.'s => deleting corresponding collumns i nthe global stiffness matrix K.

By principle of Virtual Work (PVW) => deleting also corresponding rows (here, rows 1,2,3,5,6). Corresponding rows of F are also deleted.

Resulting FD relation





What is K-1 (without calculator) d1 K = (K33 K44) - (K43 K34)



K*K-1 = K-1*K = I



$$K^{-1} \neq \frac 1 {det K} ~ K^{-1}$$