GHS_psdef/s3dkt3m2
FEM, cylindrical shell, 150x100 tri. mesh, R/t=1000
Name 
s3dkt3m2 
Group 
GHS_psdef 
Matrix ID 
1276 
Num Rows

90,449 
Num Cols

90,449 
Nonzeros

3,686,223 
Pattern Entries

3,753,461 
Kind

Structural Problem 
Symmetric

Yes 
Date

1997 
Author

R. Kouhia 
Editor

R. Boisvert, R. Pozo, K. Remington, B. Miller, R. Lipman, R. Barrett, J. Dongarra 
Structural Rank 
90,449 
Structural Rank Full 
true 
Num Dmperm Blocks

1 
Strongly Connect Components

1 
Num Explicit Zeros

67,238 
Pattern Symmetry

100% 
Numeric Symmetry

100% 
Cholesky Candidate

yes 
Positive Definite

yes 
Type

real 
Download 
MATLAB
Rutherford Boeing
Matrix Market

Notes 
%
%FILE s3dkt3m2.mtx
%TITLE Cyl shell R/t=1000 unif 150x100 triang mesh DKT elem with drill rot
%KEY s3dkt3m2
%
%
%CONTRIBUTOR Reijo Kouhia (reijo.kouhia@hut.fi)
%
%BEGIN DESCRIPTION
% Matrix from a static analysis of a cylindrical shell
% Radius to thickness ratio R/t = 1000
% Length to radius ratio R/L = 1
% One octant discretized with uniform 150 x 100 triangular mesh
% element:
% facettype shell element where the bending part is formulated
% using the stabilized MITC theory (stabilization paramater 0.4)
% the membrane part includes drilling rotations using
% the HughesBrezzi formulation with (regularizing parameter = G/1000,
% where G is the shear modulus)
% full 3point integration
% 
% Note:
% The sparsity pattern of the matrix is determined from the element
% connectivity data assuming that the element matrix is full.
% Since this case the material model is linear isotropically elastic
% and the FE mesh is uniform there exist some zeros.
% Since the removal of those zero elements is trivial
% but the reconstruction of the current sparsity
% pattern is impossible from the sparsified structure without any further
% knowledge of the element connectivity, the zeros are retained in this file.
% 
%END DESCRIPTION
%
%
