Question

By the Galerkin approach equation can be written as __________

(a) {P}-{K}{Δ}=0

(b) {K}-{P}{Δ}=0

(c) {Δ}-{p}{K}=0

(d) Undefined

I have been asked this question in homework.

This intriguing question comes from One Dimensional Problems in chapter One Dimensional Problems of Finite Element Method

Answer 1

The correct answer is (a) {P}-{K}{Δ}=0

To explain I would say: Galerkin’s method of weighted residuals, the most common method of calculating the global stiffness matrix in fem. This requires the boundary element for solving integral equations.