BCSSTK12: BCS Structural Engineering Matrices (eigenvalue matrices) Ore car -- consistent mass
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From generalized eigenvalue problem Kx=(lambda)Mx. This is matrix K; matrix M is BCSSTM12 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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Size
Type
1473 x 1473, 17857 entries
real symmetric positive definite
Nonzeros
total diagonal below diagonal above diagonal A-A' 34241 1473 16384 16384 0

Column Data
Row Data
Average nonzeros per column : 23 Standard deviation : 6.7

index nonzeros longest 55 33 shortest 9 2

Average nonzeros per row : 23 Standard deviation : 6.7

index nonzeros longest 55 33 shortest 9 2

Bandwidths
Profile Storage
lower 651 upper 651 average |i-j| 62 std.dev. 1.3e+02

min max ave. std.dev. lower bandwidth 1 651 92 1.5e+02 upper bandwidth 1 651 92 1.5e+02

Symmetric skyline storage requirement: 135219

Heaviest diagonals
offset from main 0 -1 1 -2 2 -3 3 -51 51 -50
nonzeros 1473 1235 1235 1170 1170 1158 1158 969 969 836
accumulated percent 4.30 7.91 11.52 14.93 18.35 21.73 25.11 27.94 30.77 33.21

Top 10 out of 181 nonvoid diagonals.
Conditioning
Frobenius norm 4.7e+09 condition number (est.) 5.3e+08 2-norm (est.) 6.6e+08 diagonal dominance 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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Last change in this page: Wed Sep 22 13:33:24 US/Eastern 2004
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