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  • Numerical Methods and Modeling  (5)
  • Wiley-Blackwell  (5)
  • International Union of Crystallography
  • International Union of Crystallography (IUCr)
  • Nature Publishing Group
  • 1995-1999  (5)
  • 1955-1959
Collection
Keywords
Publisher
  • Wiley-Blackwell  (5)
  • International Union of Crystallography
  • International Union of Crystallography (IUCr)
  • Nature Publishing Group
Years
  • 1995-1999  (5)
  • 1955-1959
Year
  • 1
    Electronic Resource
    Electronic Resource
    Structural responses to non-uniformly modulated evolutionary random seismic excitations (1997)
    Chichester : Wiley-Blackwell
    Communications in Numerical Methods in Engineering 13 (1997), S. 605-616 
    Details
    ISSN: 1069-8299
    Keywords: structures ; response ; seismic ; random ; earthquake ; evolutionary ; Engineering ; Numerical Methods and Modeling
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: This paper presents an accurate algorithm for structural non-stationary random seismic responses. The ground acceleration is assumed to be an evolutionary random process, of which the modulation function is non-uniformly modulated, i.e. it depends on both time and frequency. The method is used to compute the non-stationary seismic responses of a non-uniform shear beam. The dependency of the power spectral densities of the excitations and of the responses on time and frequency is discussed, based on numerical results. ©1997 John Wiley & Sons, Ltd.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 2
    Electronic Resource
    Electronic Resource
    A TWO-LEVEL DECOMPOSITION METHOD FOR SHAPE OPTIMIZATION OF STRUCTURES (1997)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 40 (1997), S. 75-88 
    Details
    ISSN: 0029-5981
    Keywords: structural design ; shape optimization ; Engineering ; Numerical Methods and Modeling
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: The paper proposes a two-level decomposition method for shape optimization of structures. The optimization problem is divided into two subproblems on the basis of the different effects on structural behaviour of different kinds of design variables. A minimum mass subproblem is solved to determine the sizing variables and a constraint evaluation function based on norm optimization is minimized to determine the shape variables. An efficient coupling technique is used between the subproblems to ensure very rapid and steady convergence. Numerical results are presented to demonstrate the effectiveness of the method. © 1997 by John Wiley & Sons, Ltd.
    Additional Material: 5 Ill.
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  • 3
    Electronic Resource
    Electronic Resource
    ASYNCHRONOUS PARALLEL COMPUTING OF STRUCTURAL NON-STATIONARY RANDOM SEISMIC RESPONSES (1997)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 40 (1997), S. 2133-2149 
    Details
    ISSN: 0029-5981
    Keywords: non-stationary random ; parallel computing ; seismic response ; Engineering ; Numerical Methods and Modeling
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: An asynchronous parallel algorithm is developed in this paper. It is based on the newly developed sequential pseudo-excitation method for structural non-stationary random responses, used with the high precision direct (HPD-S) integration method. Examples run on a Transtech Paramid MIMD parallel computer show that it has good accuracy and gives very high speed-up and efficiency. © 1997 John Wiley & Sons, Ltd.
    Additional Material: 8 Ill.
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  • 4
    Electronic Resource
    Electronic Resource
    EXACT MODAL SYNTHESIS TECHNIQUES USING RESIDUAL CONSTRAINT MODES (1997)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 40 (1997), S. 2475-2492 
    Details
    ISSN: 0029-5981
    Keywords: modal synthesis ; structural dynamics ; fixed interface ; Engineering ; Numerical Methods and Modeling
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: A new exact modal synthesis method for finding natural frequencies and modes of structures is proposed, in which the exact residual constraint modes based upon an incomplete set of normal modes of substructures with fixed interfaces are expressed in two parts. These are the static constraint modes and a residual term with which it represents exactly the effect of normal modes not retained. The modal synthesis uses a Ritz procedure and an iterative technique is presented for solving the non-linear equations of modal synthesis. This has the advantage that the results given by its first iteration are exactly those given by the Craig-Bampton-Hurty modal synthesis method, which leads to rapid convergence of subsequent iterations. The proposed method is an improvement of Hu's exact modal synthesis method and is also shown to have as its limit the method of exact dynamic condensation. Numerical examples show that using the proposed method yields superior accuracy when only a few lower modes are used. © 1997 by John Wiley & Sons, Ltd.
    Additional Material: 3 Ill.
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  • 5
    Electronic Resource
    Electronic Resource
    Higher-order compact mixed methods (1997)
    Chichester : Wiley-Blackwell
    Communications in Numerical Methods in Engineering 13 (1997), S. 553-564 
    Details
    ISSN: 1069-8299
    Keywords: mixed methods ; high-order finite differences ; compact stencils ; superconvergence ; Engineering ; Numerical Methods and Modeling
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: We develop a class of higher-order mixed finite difference methods for elliptic partial differential equations. The problem is recast as a first-order mixed system and the higher-order compact schemes follow as a natural extension of the formulations we developed previously for the scalar PDE problem. Since the flux appears explicitly in the mixed formulation we obtain higher-order (nodal superconvergent) solutions in both the primary solution field and also the flux. Some supporting numerical experiments are included to demonstrate the superconvergent rates. © 1997 John Wiley & Sons, Ltd.
    Additional Material: 6 Ill.
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