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Computational Science, Engineering & Technology Series
ISSN 1759-3158
Edited by: M. Papadrakakis, B.H.V. Topping
Chapter 7

Parallel Dynamic Relaxation Formfinding

P. Ivanyi and B.H.V. Topping

Department of Mechanical and Chemical Engineering, Heriot-Watt University, Edinburgh, United Kingdom

Full Bibliographic Reference for this chapter
P. Ivanyi, B.H.V. Topping, "Parallel Dynamic Relaxation Formfinding", in M. Papadrakakis, B.H.V. Topping, (Editors), "Innovative Computational Methods for Structural Mechanics", Saxe-Coburg Publications, Stirlingshire, UK, Chapter 7, pp 127-147, 1999. doi:10.4203/csets.1.7
The design of a tension structure is a complex procedure consisting of many parts which results in an iterative process. This process may include: conceptual design; physical modelling; computer modelling; form finding; analysis; and cutting pattern generation. To ensure the flexibility required by the designer throughout this process and to shorten the form finding - analysis - cutting pattern generation sub-tasks efficient parallel dynamic relaxation can be used. But in parallel computations, processors must generally exchange data. This exchange of data has usually a great influence on the efficiency of the parallel programs because it introduces communication delays during the execution time. By contrast most commercial codes are sequential and hence it is recognised that the parallelisation of these codes must be simple and cost-effective. These facts imply that for parallel processing there may be a need for high-level subroutine libraries, to implement the interprocessor communication schemes. In this paper, some communication schemes for computational mechanics problems will be discussed and assessed which may be included in a communication subroutine library. With this library a sequential dynamic relaxation program can be transformed into a parallel one. Some form finding results calculated using the parallel program will be presented.

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