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BCSSTM10: BCS Structural Engineering Matrices (eigenvalue matrices)
Buckling of a hot washer

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 BCSSTK10 from BCSSTRUC1 set.


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Visualizations

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

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Matrix Statistics

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Size Type
1086 x 1086, 11589 entries real symmetric positive semi-definite
Nonzeros
totaldiagonalbelow diagonalabove diagonalA-A'
22092 1086 10503 10503 0
Column Data Row Data
Average nonzeros per column : 20
Standard deviation : 5.6

indexnonzeros
longest56 27
shortest1 6

Average nonzeros per row : 20
Standard deviation : 5.6

indexnonzeros
longest56 27
shortest1 6

Bandwidths Profile Storage
lower38 upper38
average |i-j|21 std.dev.13
minmaxave.std.dev.
lower bandwidth1 38 35 4.8
upper bandwidth1 38 35 4.8

Symmetric skyline storage requirement:38129

Heaviest diagonals
offset from main0 -30 30 -5 5 -25 25 -35 35 -1
nonzeros1086 1032 1032 875 875 870 870 850 850 641
accumulated percent 4.92 9.5914.2618.2222.1826.1230.0633.9037.7540.65

Top 10 out of 63 nonvoid diagonals.
Conditioning
Frobenius norm3e+05 condition number (est.)2.4e+05
2-norm (est.)2.9e+04 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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