Matrix: TKK/t520

Description: T-beam, L = 520 mm, Quadratic four node DK type elements. R Kouhia

TKK/t520 graph
(undirected graph drawing)

TKK/t520 graph

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  • Matrix group: TKK
  • Click here for a description of the TKK group.
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  • download as a MATLAB mat-file, file size: 79 KB. Use UFget(1908) or UFget('TKK/t520') in MATLAB.
  • download in Matrix Market format, file size: 297 KB.
  • download in Rutherford/Boeing format, file size: 80 KB.

    Matrix properties
    number of rows5,563
    number of columns5,563
    structural full rank?yes
    structural rank5,563
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    Cholesky candidate?yes
    positive definite?no

    authorR. Kouhia
    editorT. Davis
    kindstructural problem
    2D/3D problem?yes

    Additional fieldssize and type
    bfull 5563-by-1
    coordfull 5563-by-3


    Matrix problems from Reijo Kouhia, Structural Mechanics, Helsinki  
    University of Technology.

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD547,230
    Cholesky flop count7.6e+07
    nnz(L+U), no partial pivoting, with AMD1,088,897
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD982,288
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD1,922,858

    SVD-based statistics:
    null space dimension4,681
    full numerical rank?no
    singular value gap5.07101e+11

    singular values (MAT file):click here
    SVD method used:s = svd (full (A)) ;

    TKK/t520 svd

    For a description of the statistics displayed above, click here.

    Maintained by Tim Davis, last updated 12-Mar-2014.
    Matrix pictures by cspy, a MATLAB function in the CSparse package.
    Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.