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BCSSTK28: BCS Structural Engineering Matrices (eigenvalue problems and linear equations)
Solid element model, linear statics

from set BCSSTRUC4, 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
4410 x 4410, 111717 entries real symmetric indefinite
Nonzeros
totaldiagonalbelow diagonalabove diagonalA-A'
219024 4410 107307 107307 0
Column Data Row Data
Average nonzeros per column : 50
Standard deviation : 9.7

indexnonzeros
longest3620 94
shortest3060 16

Average nonzeros per row : 50
Standard deviation : 9.7

indexnonzeros
longest3620 94
shortest3060 16

Bandwidths Profile Storage
lower525 upper525
average |i-j|1.1e+02 std.dev.99
minmaxave.std.dev.
lower bandwidth1 525 1.8e+02 81
upper bandwidth1 525 1.8e+02 81

Symmetric skyline storage requirement:801670
Heaviest diagonals
offset from main0 -1 1 -2 2 -3 3 -4 4 -5
nonzeros4410 4213 4213 4016 4016 3820 3820 3620 3620 3424
accumulated percent 2.01 3.94 5.86 7.69 9.5311.2713.0214.6716.3217.88

Top 10 out of 835 nonvoid diagonals.
Conditioning
Frobenius norm1.1e+09 condition number (est.)65
2-norm (est.)7.7e+08 diagonal dominanceno

Set Information

Set BCSSTRUC4
Source: Andy Mera, Randy Cigel, and John Lewis, Boeing Computer Services, Seattle, Washington.
Discipline:Dynamic analyses in structural engineering.
Accession:Summer 1984 and spring 1986

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Last change in this page: Wed Sep 22 13:33:27 US/Eastern 2004 [Comments: ]