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BCSSTK09: BCS Structural Engineering Matrices (eigenvalue matrices)
Square plate clamped

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 BCSSTM09 from BCSSTRUC1 set.


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Visualizations

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

[ VRML Version 2, gzipped ] 426224 bytes


Matrix Statistics

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Size Type
1083 x 1083, 9760 entries real symmetric positive definite
Nonzeros
totaldiagonalbelow diagonalabove diagonalA-A'
18437 1083 8677 8677 0
Column Data Row Data
Average nonzeros per column : 17
Standard deviation : 4.1

indexnonzeros
longest61 23
shortest3 6

Average nonzeros per row : 17
Standard deviation : 4.1

indexnonzeros
longest61 23
shortest3 6

Bandwidths Profile Storage
lower63 upper63
average |i-j|41 std.dev.25
minmaxave.std.dev.
lower bandwidth1 63 59 13
upper bandwidth1 63 59 13

Symmetric skyline storage requirement:63706

Heaviest diagonals
offset from main0 -57 -3 3 57 -60 -54 54 60 -1
nonzeros1083 1026 1026 1026 1026 972 972 972 972 703
accumulated percent 5.8711.4417.0022.5728.1333.4138.6843.9549.2253.03

Top 10 out of 31 nonvoid diagonals.
Conditioning
Frobenius norm8.6e+08 condition number (est.)3.1e+04
2-norm (est.)6.8e+07 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 13:33:23 US/Eastern 2004 [Comments: ]