Fuzzy evaluation of dynamics finite element model

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作者：
College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China [1 ]
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来源：
Nanjing Hangkong Hangtian Daxue Xuebao | 2006年 / 3卷 / 367-372期
关键词：
Dynamics - Evaluation - Frequencies - Fuzzy sets - Mathematical models - Matrix algebra - Membership functions;
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摘要：
Due to the evaluation of structural dynamics finite element model having the factor of subjectivity, the related theory of fuzzy mathematics is used to evaluate the dynamic finite element model. A kind of consistency fuzzy comprehensive evaluation method for the dynamic finite element model is presented. Calculated shapes and frequencies of the dynamics model are compared with that of the experimental results during the evaluation. By setting up factor sets, evaluation sets and power sets, identifying the membership function and constructing fuzzy relation matrix, the fuzzy comprehensive evaluation is fulfilled. The method confirms whether the finite element model is usable or not, and select the best one among several models. The example shows that the method is accurate in evaluating one model and can select the best one from several models.
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