Key Action Mechanisms of Intentional Mistuning
Intentional mistuning is a common procedure to decrease the uncontrolled vibration amplification effects of the (unavoidable) random mistuning, and to reduce the sensitivity to it. The idea is to introduce an intentional mistuning pattern that is small, but much larger than the existing random mistu...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-06-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/12/5650 |
| _version_ | 1797529652451868672 |
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| author | Jose Joaquin Sánchez-Álvarez Carlos Martel |
| author_facet | Jose Joaquin Sánchez-Álvarez Carlos Martel |
| author_sort | Jose Joaquin Sánchez-Álvarez |
| collection | DOAJ |
| description | Intentional mistuning is a common procedure to decrease the uncontrolled vibration amplification effects of the (unavoidable) random mistuning, and to reduce the sensitivity to it. The idea is to introduce an intentional mistuning pattern that is small, but much larger than the existing random mistuning. The frequency of adjacent blades is moved apart by the intentional mistuning, reducing the blade-to-blade coupling and, thus, the effect of the random mistuning. In order to clearly show the action mechanisms of intentional mistuning, we focus in this work in a quite simple configuration: forced response of a blade dominated modal family in a mistuned rotor with linear material damping. The problem is analysed using the asymptotic mistuning model methodology. A more reduced order model is derived that allows us to understand the relevant parameters behind the effect of intentional mistuning, and gives a simple expression for the estimation of its beneficial effect. The results from the reduced model are checked against detailed FEM simulations of two mistuned rotors. |
| first_indexed | 2024-03-10T10:16:47Z |
| format | Article |
| id | doaj.art-a9951233eaab48318136c1fb35ea6e1b |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T10:16:47Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-a9951233eaab48318136c1fb35ea6e1b2023-11-22T00:45:14ZengMDPI AGApplied Sciences2076-34172021-06-011112565010.3390/app11125650Key Action Mechanisms of Intentional MistuningJose Joaquin Sánchez-Álvarez0Carlos Martel1School of Aeronautics and Space Engineering, Universidad Politécnica de Madrid, 28040 Madrid, SpainSchool of Aeronautics and Space Engineering, Universidad Politécnica de Madrid, 28040 Madrid, SpainIntentional mistuning is a common procedure to decrease the uncontrolled vibration amplification effects of the (unavoidable) random mistuning, and to reduce the sensitivity to it. The idea is to introduce an intentional mistuning pattern that is small, but much larger than the existing random mistuning. The frequency of adjacent blades is moved apart by the intentional mistuning, reducing the blade-to-blade coupling and, thus, the effect of the random mistuning. In order to clearly show the action mechanisms of intentional mistuning, we focus in this work in a quite simple configuration: forced response of a blade dominated modal family in a mistuned rotor with linear material damping. The problem is analysed using the asymptotic mistuning model methodology. A more reduced order model is derived that allows us to understand the relevant parameters behind the effect of intentional mistuning, and gives a simple expression for the estimation of its beneficial effect. The results from the reduced model are checked against detailed FEM simulations of two mistuned rotors.https://www.mdpi.com/2076-3417/11/12/5650forced responsemistuningaerodynamic dampingturbomachinery |
| spellingShingle | Jose Joaquin Sánchez-Álvarez Carlos Martel Key Action Mechanisms of Intentional Mistuning Applied Sciences forced response mistuning aerodynamic damping turbomachinery |
| title | Key Action Mechanisms of Intentional Mistuning |
| title_full | Key Action Mechanisms of Intentional Mistuning |
| title_fullStr | Key Action Mechanisms of Intentional Mistuning |
| title_full_unstemmed | Key Action Mechanisms of Intentional Mistuning |
| title_short | Key Action Mechanisms of Intentional Mistuning |
| title_sort | key action mechanisms of intentional mistuning |
| topic | forced response mistuning aerodynamic damping turbomachinery |
| url | https://www.mdpi.com/2076-3417/11/12/5650 |
| work_keys_str_mv | AT josejoaquinsanchezalvarez keyactionmechanismsofintentionalmistuning AT carlosmartel keyactionmechanismsofintentionalmistuning |