BCSSTM12: BCS Structural Engineering Matrices (eigenvalue matrices)Ore car -- consistent mass

from set BCSSTRUC1, from the Harwell-Boeing Collection

From generalized eigenvalue problem Kx=(lambda)Mx. This is matrix M; matrix K is BCSSTK12 from BCSSTRUC1 set.
BCSSTK11, BCSSTM11, BCSSTK12 and BCSSTM12 represent the lumped and consistent mass formulation for an ore car model. In both cases the consistent mass formulations lead to non-diagonal mass matrices. The eigenvalues from the two formulations of a model should be similar, but not necessarily equal.

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Matrix Statistics

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Size Type
1473 x 1473, 10566 entries real symmetric positive semi-definite
Nonzeros
totaldiagonalbelow diagonalabove diagonalA-A'
19659 1473 9093 9093 0
Column Data Row Data
Average nonzeros per column : 13
Standard deviation : 5.2

index nonzeros 55 22 9 2

Average nonzeros per row : 13
Standard deviation : 5.2

index nonzeros 55 22 9 2

Bandwidths Profile Storage
 lower upper 650 650 63 130
minmaxave.std.dev.
lower bandwidth1 650 91 1.5e+02
upper bandwidth1 650 91 1.5e+02

Symmetric skyline storage requirement:134315

Heaviest diagonals
 offset from main nonzeros accumulated percent 0 -3 3 -51 51 -48 48 -54 54 -1 1473 1101 1101 969 969 772 772 757 757 483 7.49 13.09 18.69 23.62 28.55 32.48 36.41 40.26 44.11 46.56

Top 10 out of 159 nonvoid diagonals.
Conditioning
 Frobenius norm condition number (est.) 82 8.9e+05 13 no

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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