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FRF simulation of structural joints with uncertain parameters
Author(s) -
Hanss Michael,
Oexl Stefan,
Gaul Lothar
Publication year - 2003
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.200310330
Subject(s) - fuzzy logic , joint (building) , transformation (genetics) , control theory (sociology) , function (biology) , computer science , frequency response , mathematics , structural engineering , engineering , control (management) , artificial intelligence , biochemistry , chemistry , electrical engineering , evolutionary biology , biology , gene
For the simulation of systems with uncertain parameters, the application of fuzzy arithmetic proves to be a practical approach. The uncertainties in the model parameters can be taken into account by defining them as fuzzy numbers, and the uncertain system can then be simulated by applying fuzzy arithmetic based on the so‐called transformation method. As an example, a normally‐loaded joint which connects two rods in axial direction is discussed in the paper. A worst‐case scenario for the frequency response function (FRF) of the coupled rods with uncertainties in the joint can be obtained, and additionally, one can get information about how much each of the uncertain model parameters contributes to the overall uncertainty of the model output at different frequencies of excitation.