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BCSSTK13: BCS Structural Engineering Matrices (eigenvalue matrices)
Fluid flow generalized eigenvalues

from set BCSSTRUC1, from the Harwell-Boeing Collection

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From generalized eigenvalue problem Kx=(lambda)Mx. This is matrix K; matrix M is BCSSTM13 from BCSSTRUC1 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
2003 x 2003, 42943 entries real symmetric positive definite
Nonzeros
totaldiagonalbelow diagonalabove diagonalA-A'
83883 2003 40940 40940 0
Column Data Row Data
Average nonzeros per column : 42
Standard deviation : 23

indexnonzeros
longest1534 95
shortest34 5

Average nonzeros per row : 42
Standard deviation : 23

indexnonzeros
longest1534 95
shortest34 5

Bandwidths Profile Storage
lower1251 upper1251
average |i-j|1.3e+02 std.dev.1.9e+02
minmaxave.std.dev.
lower bandwidth1 1251 2.2e+02 2.7e+02
upper bandwidth1 1251 2.2e+02 2.7e+02

Symmetric skyline storage requirement:436801

Heaviest diagonals
offset from main0 -1 1 -2 2 -4 4 -6 6 -5
nonzeros2003 1358 1358 1142 1142 1056 1056 1033 1033 836
accumulated percent 2.39 4.01 5.63 6.99 8.35 9.6110.8712.1013.3314.33

Top 10 out of 1841 nonvoid diagonals.
Conditioning
Frobenius norm7.5e+12 condition number (est.)4.6e+10
2-norm (est.)3.1e+12 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: ]