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BCSSTM06: BCS Structural Engineering Matrices (eigenvalue matrices)
Medium test problem -- lumped mass

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 BCSSTK06 from BCSSTRUC1 set.
BCSSTK06 and BCSSTM06 repesent the lumped (diagonal) mass formulation for the same problem for which BCSSTK07 and BCSSTM07 form the consistent mass formulation.

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Structure Plot City Plot
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3D Interactive City Plot

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Matrix Statistics

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Size Type
420 x 420, 420 entries real symmetric positive definite
totaldiagonalbelow diagonalabove diagonalA-A'
420 420 0 0 0
Column Data Row Data
Average nonzeros per column : 1
Standard deviation : 0

longest1 1
shortest1 1

Average nonzeros per row : 1
Standard deviation : 0

longest1 1
shortest1 1

Bandwidths Profile Storage
lower1 upper1
average |i-j|0
lower bandwidth1 1 1 0
upper bandwidth1 1 1 0

Symmetric skyline storage requirement:420

Heaviest diagonals
offset from main0
accumulated percent100.00

Top 1 out of 1 nonvoid diagonals.
Frobenius norm6.7e+04 condition number (est.)3.5e+06
2-norm (est.)7.6e+03 diagonal dominanceyes

Set Information

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: ]