Today machine manufacturers are increasingly assembling their products from components manufactured by subcontractors. The component manufacturers often have made detailed FE models of their products. If the designer of the new built-up machine could use these models, he would save a lot of work. To utilise the models the companies must have FE programs than can transfer data. Even then there is a risk that all relevant data is not transfered properly. The FE programs may also differ so, that the results calculated with the transfered model are not the same as with the original program. And the combined FE model of the built-up product becomes large, often too large for practical design calculations. A natural solution is to use substructures. The subcontractors can make reduced sized substructures of their products and the designer uses them in his calculations. However, there are various substructure synthesis methods and file formats, so this works only if the companies use the same FE program. Here a new general method to connect substructures is presented. With this method submodels formed with almost any reduction/substructure method and program can be connected. Also a new kind of substructure is presented. It includes not only stiffness and mass but also damping which is not assumed to be proportional to mass and stiffness. Finally a standard file format for the new substucture is proposed.
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- Reduction method independent substructure synthesis
Paul J. Klinge
- Springer Netherlands
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