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On the Comparison of Possibilistic and Probabilistic Methods for the Determination of the Worst-Case Response of Mistuned Bladed Disks
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145-IMechE_On the Comparison of Possibilistic and Probabilistic Methods for the Determination of the Worst-Case Response of Mistuned Bladed Disks_2012.pdf
Date
2012-9-11
Author
Özgüven, Hasan Nevzat
Ciğeroğlu, Ender
Karataş, H. Çağlar
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In this paper, the possibilistic and probabilistic methods are compared with each other by utilizing a lumped parameter vibratory system and a mistuned bladed disk model. In these models stiffness elements are considered to be uncertain, which are assumed to have Gaussian probability distribution. Both methods are utilized for determining uncertain natural frequencies and the worst-case blade tip displacements. The blade tip displacement amplitudes gathered from different number of Monte-Carlo iterations and calculated by fuzzy forced response solution are compared and it is found that among the two, only the possibilistic method converges to the worst-possible blade tip displacement value, and requires significantly less computational time.
URI
https://hdl.handle.net/11511/105159
Conference Name
10th International Conference on Vibrations in Rotating Machinery (11-13 September, 2012)
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Department of Mechanical Engineering, Conference / Seminar
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H. N. Özgüven, E. Ciğeroğlu, and H. Ç. Karataş, “On the Comparison of Possibilistic and Probabilistic Methods for the Determination of the Worst-Case Response of Mistuned Bladed Disks,” presented at the 10th International Conference on Vibrations in Rotating Machinery (11-13 September, 2012), IMechE London, UK, 2012, Accessed: 00, 2023. [Online]. Available: https://hdl.handle.net/11511/105159.