BCSSTM11: BCS Structural Engineering Matrices (eigenvalue matrices)
Ore car -- lumped mass

from set BCSSTRUC1, from the Harwell-Boeing Collection

From generalized eigenvalue problem Kx=(lambda)Mx. This is matrix M; matrix K is BCSSTK11 from BCSSTRUC1 set.
BCSSTK11, BCSSTM11, BCSSTK12 and BCSSTM12 represent the lumped and consistent mass formulation for an ore car model. In both cases the consistent mass formulations lead to non-diagonal mass matrices. The eigenvalues from the two formulations of a model should be similar, but not necessarily equal.

Download as

Compressed MatrixMarket format file: bcsstm11.mtx.gz (8499 bytes)
Compressed Harwell-Boeing format file: bcsstm11.rsa.gz (4373 bytes)

Visualizations

Click on image to get an enlarged version. Click on label to get an explanation.

Structure Plot	City Plot
	3D Interactive City Plot
	[ VRML Version 2, gzipped ] 173483 bytes

Matrix Statistics

Size	Type
1473 x 1473, 1473 entries	real symmetric positive definite
Nonzeros
total diagonal below diagonal above diagonal A-A' 1473 1473 0 0 0
Column Data	Row Data
Average nonzeros per column : 1 Standard deviation : 0 index nonzeros longest 1 1 shortest 1 1	Average nonzeros per row : 1 Standard deviation : 0 index nonzeros longest 1 1 shortest 1 1
Bandwidths	Profile Storage
lower 1 upper 1 average |i-j| 0 std.dev. 0	min max ave. std.dev. lower bandwidth 1 1 1 0 upper bandwidth 1 1 1 0 Symmetric skyline storage requirement:1473
Heaviest diagonals
offset from main 0 nonzeros 1473 accumulated percent 100.00 Top 1 out of 1 nonvoid diagonals.
Conditioning
Frobenius norm 3e+02 condition number (est.) 1.2e+05 2-norm (est.) 32 diagonal dominance yes

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Last change in this page: Wed Sep 22 13:33:24 US/Eastern 2004 [Comments: ]