Question

Symmetry and sparsity of the global stiffness matrix can be approached by _____ methods.

(a) One

(b) Three

(c) Two

(d) Four

I have been asked this question in my homework.

The above asked question is from Assembly of Global Stiffness Matrix for the Banded & Skyline Solutions topic in chapter Trusses of Finite Element Method

Answer 1

The correct choice is (c) Two

To explain I would say: In assembly of global stiffness matrix, the solution for finite element equations can take advantage of symmetry and sparsity of global stiffness matrix. There are two methods to identify them. They are banded approach and skyline approach methods.