Showing papers in "Computing Systems in Engineering in 1995"

TL;DR: TOP/DOMDEC as discussed by the authors is an interactive software package for mesh partitioning and parallel processing, which offers several state-of-the-art graph decomposition algorithms in a user friendly environment.

TL;DR: Problem decomposition strategies for load balancing parallel computations on adaptive hp finite element discretizations are discussed in this work and a new ordering scheme for efficient recursive bisection of orderings is introduced.

TL;DR: The Design Sensitivity Analysis and Optimization tool, developed initially for sizing design application, has been extended to support shape design applications of structural components, including shape design parameterization, error analysis and mesh adaptation, design velocity field computation, shape design sensitivity analysis, and interactive design steps are discussed.

TL;DR: This work presents an approach which combines independent PDE solvers for simple domains which collaborate using interface relaxation to solve complex problems and shows that this is a promising approach for efficiently solving complicated problems on modern computer environments.

TL;DR: In this article, an automated approach is used to carry out sensitivity analysis and to obtain optimum shapes for plates and shells in which the natural frequencies are maximized, and the results obtained for optimum solutions in the present paper justify the usage of the semi-analytical method for sensitivities calculations for structural shape optimization purposes.

TL;DR: This paper presents recent research efforts at Rensselaer Polytechnic Institute aimed at developing computer-aided multiscale modeling tools for composite materials and structures aimed at predicting the macromechanical structural response.

TL;DR: In this article, a computational scheme is introduced for the integration of rate-dependent multiple-slip crystal plasticity constitutive relations, which are intrinsically related to the evolution of microstructural failure modes in metallic crystals.

TL;DR: Chaos synchronous and asynchronous schemes based on two-stage methods to solve nonsingular linear systems are presented and the convergence of these schemes is studied either when the chaotic parameters become sufficiently large or when the matrix in question is monotone.

TL;DR: The scalable performance range of the present code is significantly extended by operating on the Paragon system at the present time, and the high parallel efficiency is sustainable only up to a limited size of addressable memory.

TL;DR: The underlying physical concepts and mathematical background of the subspace iteration technique are investigated, and an explanation for the slow convergence rate of the higher required eigenpairs is provided.

TL;DR: In this paper, the free vibration analysis of plate and shell structures is performed using Coons patches and the analysis is carried out using the nine-noded, degenerated, Huang-Hinton element with assumed strain fields.

TL;DR: It has been found that the performance of the enhanced variant of the p - method for shells is comparable to that of the h -method for low accuracy requirements, and better if higher accuracies are desired.

TL;DR: A processor mapping algorithm is developed to cover the initial computation stage and the recomputation stage of substructure analysis and the performances of parallel global approach and parallel substructure approach for two practical structure models are compared.

TL;DR: The object-oriented design and implementation of the class libraries provide clean and consistent user interfaces, which not only help to improve the clarity and expressiveness of the client parallel codes, but also hide implementation details and complexity from the user to ease parallel programming tasks.

TL;DR: Parallel implementations described in this work follow different message-passing strategies and capitalise on the fact that the vector of weights for each matrix can be calculated independently.

TL;DR: A new algorithm for this partitioning problem for unstructured meshes and the effects of different partitions on a parallel finite element solver are considered and the trade-off which exists is analyzed.

TL;DR: The two-level iterative approach proposed in this paper consists of resolving the lower frequency response of the source problem by means of the equivalent positive definite collocation problem and capturing higher frequency response using projected conjugate gradient method.

TL;DR: A new iterative solver for general purpose finite element codes which functions as a “black-box” solver using element-specific information and the underlying problem physics to construct an effective and inexpensive preconditioner is described.

TL;DR: In this paper, the authors presented an optimized radiation program for the simulation of the temperature field for radiation-heated mobile casting molds. But the authors only considered the case of geometrically complex castings like turbine blades, where a larger number of radiating surfaces is involved.

TL;DR: This system is based on the principle of heuristic substitution and provides the designer with a quick and easy way of obtaining a preliminary costing for a bridge design and can be used to explore the implications of varying this design.

TL;DR: A knowledge-based system to assist Southern California Edison in the design of electric service facilities for residential developments supports SCE planners both by performing spatial reasoning in support of the design task and by performing more routine parts of thedesign.

TL;DR: A new mapping algorithm is presented for domain decomposition for the purpose of allowing researchers to conduct finite element analysis on massively parallel computers and has been developed in a creative way such that it is closer to a human's natural thinking when making decisions.

TL;DR: In this paper, the main issues when porting existing codes from serial to parallel computers and when developing portable parallel software on MIMD multiprocessors (shared memory, virtual shared memory, and distributed memory) are discussed.

TL;DR: The main thrust of this investigation is to identify the characteristics of the VAX vector processor that affect performance, and to show how that performance information can be used to build optimized algorithms.

TL;DR: A new approach for detecting and/or studying concurrent events in distributed memory machines if race conditions occur in a certain program run is discussed and through event graph manipulation the user can investigate whether wrong results may appear through different ordering of events.

TL;DR: An approach to this problem that combines parabolized stability equation (PSE) methodology with spatial direct numerical simulation (DNS) is formulated, which is applied to the investigation of the laminar breakdown of the boundary layer on an axisymmetric sharp cone in Mach 8 flow.

TL;DR: It is proved that the problem of determining the best loop arrangement by partitioning the dependence graph is NP-hard and a heuristic for solving this problem is described.

TL;DR: Analytical model for reconfiguration control communication overheads and some performance figures obtained using these models are presented for the discussed architectures.

TL;DR: This communication addresses some issues concerning the implementation of the first prototype of a heterogeneous architecture based on a message passing MIMD topology at the top level and VLSI associative processor arrays (APA, SIMD structure) for low level image processing tasks.