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The Influence of the Number of Finite Elements upon the Accuracy of the Results Obtained Using Discrete Models

Author(s): Vasile Iancu | Carla Protocsil | Nicoleta Gillich | Cornel Hatiegan | Gilbert-Rainer Gillich

Journal: Analele Universităţii Eftimie Murgu Reşiţa. Fascicula de Inginerie
ISSN 1453-7397

Volume: XX;
Issue: 3;
Start page: 189;
Date: 2013;
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Keywords: beam | frequency | discrete model | model accuracy

Discrete models are often used because they require a simple mathematical approach, even if their accuracy is inferior to continues models. This paper presents a study regarding the influence of the number of used elements upon the accuracy with which the natural frequencies of straight beams can determined. The results show that, to achieve a reasonable accuracy, it is necessary to use at least ten elements, while for rigorous calculus, more than three hundred elements must be considered.

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