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BCSSTK29: BCS Structural Engineering Matrices (large eigenvalue problems)
Buckling model of a Boeing 767 rear pressure bulkhead

from set BCSSTRUC5, from the Harwell-Boeing Collection

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Stiffness matrix


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Visualizations

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Structure Plot
structure plot


Matrix Statistics

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Size Type
13992 x 13992, 316740 entries pattern symmetric indefinite
Nonzeros
totaldiagonalbelow diagonalabove diagonalA-A'
619488 13992 302748 302748 0
Column Data Row Data
Average nonzeros per column : 44
Standard deviation : 16

indexnonzeros
longest12333 71
shortest1819 5

Average nonzeros per row : 44
Standard deviation : 16

indexnonzeros
longest12333 71
shortest1819 5

Bandwidths Profile Storage
lower1158 upper1158
average |i-j|3.4e+02 std.dev.3.1e+02
minmaxave.std.dev.
lower bandwidth0 1157 5.3e+02 2.4e+02
upper bandwidth0 1157 5.3e+02 2.4e+02

Symmetric skyline storage requirement:7441166

Heaviest diagonals
offset from main0 -1 1 -2 2 -3 3 -4 4 -5
nonzeros13992 12530 12530 11146 11146 8464 8464 8405 8405 7373
accumulated percent 2.26 4.28 6.30 8.10 9.9011.2712.6313.9915.3516.54

Top 10 out of 2315 nonvoid diagonals.
Conditioning
Pattern matrix. No conditioning information.


Set Information

Set BCSSTRUC5
Source: Boeing Computer Services
Discipline:Structural engineering
Accession:Spring 1986


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Last change in this page: Wed Sep 22 13:33:28 US/Eastern 2004 [Comments: ]