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BCSSTM01: BCS Structural Engineering Matrices (eigenvalue matrices)
Small test problem

from set BCSSTRUC1, from the Harwell-Boeing Collection

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


From generalized eigenvalue problem Kx=(lambda)Mx. This is matrix M; matrix K is BCSSTK01 from BCSSTRUC1 set.


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Visualizations

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Structure Plot City Plot
structure plot city plot
3D Interactive City Plot

[ VRML Version 2, gzipped ] 6453 bytes


Matrix Statistics

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Size Type
48 x 48, 48 entries real symmetric positive semi-definite
Nonzeros
totaldiagonalbelow diagonalabove diagonalA-A'
24 24 0 0 0
Column Data Row Data
Average nonzeros per column : 0.5
Standard deviation : 0.51

indexnonzeros
longest1 1
shortest4 0

Average nonzeros per row : 0.5
Standard deviation : 0.51

indexnonzeros
longest1 1
shortest4 0

Bandwidths Profile Storage
lower1 upper1
average |i-j|0 std.dev.0
minmaxave.std.dev.
lower bandwidth1 49 14 16
upper bandwidth1 49 14 16

Symmetric skyline storage requirement:672

Heaviest diagonals
offset from main0
nonzeros24
accumulated percent100.00

Top 1 out of 1 nonvoid diagonals.
Conditioning
Frobenius norm7.7e+02 condition number (est.)Inf
2-norm (est.)2e+02 diagonal dominanceno


Set Information

Set BCSSTRUC1
Source: John Lewis, Boeing Computer Services, Seattle, Washington, USA
Discipline:Dynamic analyses in structural engineering
Accession:Summer 1982


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