BCSSTM06: BCS Structural Engineering Matrices (eigenvalue matrices)
Medium test problem -- lumped mass

from set BCSSTRUC1, from the Harwell-Boeing Collection

From generalized eigenvalue problem Kx=(lambda)Mx. This is matrix M; matrix K is BCSSTK06 from BCSSTRUC1 set.
BCSSTK06 and BCSSTM06 repesent the lumped (diagonal) mass formulation for the same problem for which BCSSTK07 and BCSSTM07 form the consistent mass formulation.

Download as

Compressed MatrixMarket format file: bcsstm06.mtx.gz (2914 bytes)
Compressed Harwell-Boeing format file: bcsstm06.rsa.gz (2156 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 ] 52408 bytes

Matrix Statistics

Size	Type
420 x 420, 420 entries	real symmetric positive definite
Nonzeros
total diagonal below diagonal above diagonal A-A' 420 420 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:420
Heaviest diagonals
offset from main 0 nonzeros 420 accumulated percent 100.00 Top 1 out of 1 nonvoid diagonals.
Conditioning
Frobenius norm 6.7e+04 condition number (est.) 3.5e+06 2-norm (est.) 7.6e+03 diagonal dominance yes

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