Question

Formula for maximum span or half band width in banded approach is _____

(a) me=[|i-j|+1]

(b) \(\frac{y_2-y_1}{l_e}\)

(c) q^‘=lq

(d) me=[2|i-j|+1]

This question was posed to me in an interview.

I would like to ask this question from Assembly of Global Stiffness Matrix for the Banded & Skyline Solutions in division Trusses of Finite Element Method

Answer 1

Correct option is (d) me=[2|i-j|+1]

Explanation: The matrix has a given band width what we mean is that the band width is at most the quantity, not that it is necessarily exactly equal to that quantity. In a banded approach, half band width is as given

me=[2|i-j|+1]