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BCSSTK24: BCS Structural Engineering Matrices (eigenvalue problems)
Calgary Olympic Saddledome arena

from set BCSSTRUC3, from the Harwell-Boeing Collection

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From generalized eigenvalue problem Kx=(lambda)Mx. This is matrix K; matrix M is BCSSTM24 from BCSSTRUC3 set.


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Visualizations

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Structure Plot City Plot
structure plot city plot


Matrix Statistics

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Size Type
3562 x 3562, 81736 entries real symmetric indefinite
Nonzeros
totaldiagonalbelow diagonalabove diagonalA-A'
159910 3562 78174 78174 0
Column Data Row Data
Average nonzeros per column : 45
Standard deviation : 11

indexnonzeros
longest1235 57
shortest214 15

Average nonzeros per row : 45
Standard deviation : 11

indexnonzeros
longest1235 57
shortest214 15

Bandwidths Profile Storage
lower3334 upper3334
average |i-j|4.1e+02 std.dev.8.3e+02
minmaxave.std.dev.
lower bandwidth1 3334 5.7e+02 9.8e+02
upper bandwidth1 3334 5.7e+02 9.8e+02

Symmetric skyline storage requirement:2031722

Heaviest diagonals
offset from main0 -1 1 -2 2 -3 3 -4 4 -5
nonzeros3562 3458 3458 3350 3350 3226 3226 3124 3124 3042
accumulated percent 2.23 4.39 6.55 8.6510.7412.7614.7816.7318.6820.59

Top 10 out of 4309 nonvoid diagonals.
Conditioning
Frobenius norm1.4e+14 condition number (est.)65
2-norm (est.)3.1e+13 diagonal dominanceno


Set Information

Set BCSSTRUC3
Source: John Lewis, Boeing Computer Services, Seattle, WA
Discipline:Dynamic analyses in structural engineering
Accession:Summer 1984 to spring 1985


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Last change in this page: Wed Sep 22 13:33:26 US/Eastern 2004 [Comments: ]