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BCSSTM04: BCS Structural Engineering Matrices (eigenvalue matrices)
Oil rig -- not condensed

from set BCSSTRUC1, from the Harwell-Boeing Collection

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From generalized eigenvalue problem Kx=(lambda)Mx. This is matrix M; matrix K is BCSSTK04 from BCSSTRUC1 set.

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

[ VRML Version 2, gzipped ] 16500 bytes

Matrix Statistics

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Size Type
132 x 132, 132 entries real symmetric positive semi-definite
totaldiagonalbelow diagonalabove diagonalA-A'
66 66 0 0 0
Column Data Row Data
Average nonzeros per column : 0.5
Standard deviation : 0.5

longest1 1
shortest4 0

Average nonzeros per row : 0.5
Standard deviation : 0.5

longest1 1
shortest4 0

Bandwidths Profile Storage
lower1 upper1
average |i-j|0
lower bandwidth1 133 35 44
upper bandwidth1 133 35 44

Symmetric skyline storage requirement:4620

Heaviest diagonals
offset from main0
accumulated percent100.00

Top 1 out of 1 nonvoid diagonals.
Frobenius norm0.82 condition number (est.)Inf
2-norm (est.)0.17 diagonal dominanceno

Set Information

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: ]