PDE Toolkit - what is d when m is non-zero?
1 view (last 30 days)
Show older comments
Commented: Sattik Basu on 25 Jan 2022
To solve the following equation
we need to input values of m,d,c,a and f.
I have been able to input m,c,a,f, however, for d, there is a special rule. The following is from Matlab's own support pages.
It says "Generally, d is either proportional to results results.M, or is a linear combination of results.M and results.K". M and K are matrices obtained after the assembleFEMatrices (i.e., after discretization).
Now, to say the least, this is confusing, as I do have the values of the d matrix (2x2 symmetric matrix in my case). Any insights would be appreciated.
Ravi Kumar on 21 Jan 2022
When m is non-zero in a structural problem, d-matrix (coefficient) could represent a damping matrix. That is the most common use case. Hence, the documentation describes how to compute d, proportional damping matrix, as a combination of global mass and stiffness matrix.
Find more on Eigenvalue Problems in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!Start Hunting!