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BCSSTK15: BCS Structural Engineering Matrices (linear equations)
Module of an offshore platform

from set BCSSTRUC2, from the Harwell-Boeing Collection

[Download] [Visualizations] [Matrix Statistics] [Set Information]


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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
3948 x 3948, 60882 entries real symmetric positive definite
Nonzeros
totaldiagonalbelow diagonalabove diagonalA-A'
117816 3948 56934 56934 0
Column Data Row Data
Average nonzeros per column : 30
Standard deviation : 7.6

indexnonzeros
longest1198 44
shortest499 1

Average nonzeros per row : 30
Standard deviation : 7.6

indexnonzeros
longest1198 44
shortest499 1

Bandwidths Profile Storage
lower438 upper438
average |i-j|1.4e+02 std.dev.1.4e+02
minmaxave.std.dev.
lower bandwidth1 438 2.5e+02 1.1e+02
upper bandwidth1 438 2.5e+02 1.1e+02

Symmetric skyline storage requirement:998118

Heaviest diagonals
offset from main0 -2 2 -1 1 -4 4 -12 12 -6
nonzeros3948 2721 2721 2700 2700 1721 1721 1600 1600 1241
accumulated percent 3.35 5.66 7.9710.2612.5514.0115.4716.8318.1919.24

Top 10 out of 875 nonvoid diagonals.
Conditioning
Frobenius norm5.7e+10 condition number (est.)8e+09
2-norm (est.)6.5e+09 diagonal dominanceno


Set Information

Set BCSSTRUC2
Source: Prof Mac Will, Georgia Institute of Technology.
Discipline:Static analyses in structural engineering
Accession:Summer 1985


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Last change in this page: Wed Sep 22 13:33:25 US/Eastern 2004 [Comments: ]