BCSSTM10: BCS Structural Engineering Matrices (eigenvalue matrices)
Buckling of a hot washer

from set BCSSTRUC1, from the Harwell-Boeing Collection

From generalized eigenvalue problem Kx=(lambda)Mx. This is matrix M; matrix K is BCSSTK10 from BCSSTRUC1 set.

Download as

Compressed MatrixMarket format file: bcsstm10.mtx.gz (70446 bytes)
Compressed Harwell-Boeing format file: bcsstm10.rsa.gz (43333 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 ] 589826 bytes

Matrix Statistics

Size	Type
1086 x 1086, 11589 entries	real symmetric positive semi-definite
Nonzeros
total diagonal below diagonal above diagonal A-A' 22092 1086 10503 10503 0
Column Data	Row Data
Average nonzeros per column : 20 Standard deviation : 5.6 index nonzeros longest 56 27 shortest 1 6	Average nonzeros per row : 20 Standard deviation : 5.6 index nonzeros longest 56 27 shortest 1 6
Bandwidths	Profile Storage
lower 38 upper 38 average |i-j| 21 std.dev. 13	min max ave. std.dev. lower bandwidth 1 38 35 4.8 upper bandwidth 1 38 35 4.8 Symmetric skyline storage requirement:38129
Heaviest diagonals
offset from main 0 -30 30 -5 5 -25 25 -35 35 -1 nonzeros 1086 1032 1032 875 875 870 870 850 850 641 accumulated percent 4.92 9.59 14.26 18.22 22.18 26.12 30.06 33.90 37.75 40.65 Top 10 out of 63 nonvoid diagonals.
Conditioning
Frobenius norm 3e+05 condition number (est.) 2.4e+05 2-norm (est.) 2.9e+04 diagonal dominance no

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