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  • 1
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    Nonlinear analysis of field distribution in electric motor with periodicity conditions (1981)
    Springer
    Details
    Publication Date: 1981-05-01
    Print ISSN: 0948-7921
    Electronic ISSN: 1432-0487
    Topics: Electrical Engineering, Measurement and Control Technology
    Published by Springer
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  • 2
    Electronic Resource
    Electronic Resource
    Nonlinear analysis of field distribution in electric motor with periodicity conditions (1981)
    Springer
    Electrical engineering 64 (1981), S. 195-200 
    Details
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Übersicht Es wurde eine numerische Analyse der Verteilung des elektromagnetischen Feldes im linearen röhrenförmigen elektrischen Motor mittels der Methode der Finiten Elemente durchgeführt. Zwei Fortran-Programmen zur Lösung großer Systeme der Lineargleichungen mit DBBF und BF Koeffizientmatrizen wurden für diese Analyse entwickelt. Ein neuer Iterationsalgorithmus berücksichtigt die Nichtlinearität des Eisens und die Periodizitätsbedingungen. Resultate der Analyse — d. h. Diagramme der magnetischen Induktion und der Schubkraft des Motors-sind unmittelbar anwendbar beim Entwurf elektrischer Motore.
    Notes: Contents Numerical analysis of electromagnetic field distribution in linear motion tubular electric motor has been performed with the aid of finite element method. Two Fortran programmes for the solution of DBBF and BF large linear symmetric equation systems have been developed for purposes of this analysis. A new iterative algorithm, taking into account iron nonlinearity and periodicity conditions, has been introduced. Final results of the analysis in the form of induction diagrammes and motor driving force and directly useful for motor designers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01574301
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  • 3
    Electronic Resource
    Electronic Resource
    Block-indexed solution of very large linear equation systems with symmetric dbbf coefficient matrix (1982)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 18 (1982), S. 1529-1546 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: The finite element solution of various partial differential equations leads to large linear equation systems, which may have a DBBF (double bounded band form) coefficient matrix, if periodicity conditions are taken into account. An efficient Fortran program solving such equation systems, developed for Control Data computers from the Cyber 70/170 series, utilizes the original block-indexed approach to reduce input-output time in communication with disc memory. Program performance is presented in some detail and quantitative comparison with other possible algorithms is carried out. An appendix lists the complete program.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620181008
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  • 4
    Electronic Resource
    Electronic Resource
    A block equation solver for large unsymmetric linear equation systems with dense coefficient matrices (1987)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 24 (1987), S. 289-300 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: The presented solver uses the Crout L-U decomposition method. Disk memory space requirements are reduced to an absolute minimum and disk input-output is spectacularly limited. Very extensive pivoting improves numerical accuracy and stability. Experimental test runs prove the overall efficiency of the solver.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620240203
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  • 5
    Electronic Resource
    Electronic Resource
    An algorithm for the solution of very large banded unsymmetric linear equation systems (1981)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 17 (1981), S. 1103-1117 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: This paper presents an algorithm and corresponding FORTRAN program for the solution of unsymmetric banded linear equation systems. The algorithm is based on the Crout method. A special technique, called double windowing, enables the solution of very large equation systems with a total equation number reaching 30,000 and a full bandwidth in excess of 1,000. Special attention was devoted to minimization of peripheral processor time (communication with backing disc memory). An appendix lists the complete program for Cyber series computers (CDC).
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620170711
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  • 6
    Electronic Resource
    Electronic Resource
    PIVOTED BLOCK SOLVERS FOR LARGE BANDED LINEAR EQUATION SYSTEMS (1997)
    Chichester : Wiley-Blackwell
    Communications in Numerical Methods in Engineering 13 (1997), S. 407-415 
    Details
    ISSN: 1069-8299
    Keywords: banded linear equation systems ; partial pivoting ; Engineering ; Numerical Methods and Modeling
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: A new method of pivoting applicable to banded unsymmetric linear equation systems has been introduced. It limits the fill-in and preserves the basic structure. Two solvers, using the new pivoting strategy, have been developed. Both solvers have been written in the C language for two popular UNIX platforms (PC486 and the Sun Sparc5). Details of the solvers' implementations are described comprehensively. Quantitative results of the test runs on both platforms are presented. © 1997 John Wiley & Sons, Ltd.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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