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DWT 72: Everstine's collection
Grillage

from set DWT, from the Harwell-Boeing Collection

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The finite element model that generated this matrix contains 72 nodes and 75 beam elements. The model is shown below. Beam and rod elements are drawn as tubes.

Image of model for dwt 72
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Visualizations

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Structure Plot
structure plot


Matrix Statistics

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Size Type
72 x 72, 222 entries pattern symmetric indefinite
Nonzeros
totaldiagonalbelow diagonalabove diagonalA-A'
222 72 75 75 0
Column Data Row Data
Average nonzeros per column : 3.1
Standard deviation : 0.62

indexnonzeros
longest20 5
shortest1 2

Average nonzeros per row : 3.1
Standard deviation : 0.62

indexnonzeros
longest20 5
shortest1 2

Bandwidths Profile Storage
lower13 upper13
average |i-j|1.6 std.dev.2.7
minmaxave.std.dev.
lower bandwidth1 13 3.4 3.1
upper bandwidth1 13 3.4 3.1

Symmetric skyline storage requirement:244

Heaviest diagonals
offset from main0 -1 1 -7 7 -2 2 -12 12
nonzeros72 55 55 9 9 7 7 4 4
accumulated percent32.4357.2181.9886.0490.0993.2496.4098.20100.00

Top 9 out of 9 nonvoid diagonals.
Conditioning
Pattern matrix. No conditioning information.


Set Information

Set DWT
Source: Gordon Everstine, David W. Taylor Naval Ship Research and Development Center, Bethesda, MD, USA.
Discipline:Structural engineering
Accession:Summer 1980


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