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Prediction of vibration characteristics of blisks using similitude models.

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Title: Prediction of vibration characteristics of blisks using similitude models.
Authors: Luo, Zhong1 zhluo@mail.neu.edu.cn, Wang, You2, Zhai, Jingyu3, Zhu, Yunpeng4, Wang, Deyou5
Source: Mechanics Based Design of Structures & Machines. 2019, Vol. 47 Issue 2, p121-135. 15p.
Subjects: Scaling laws (Statistical physics), Thin-walled structures, Airplane motors, Thickness measurement, Vibration (Mechanics)
Abstract: This study investigates the determination approach of distorted scaling laws for predicting the dynamic characteristic of an aero engine's blisk. Based on the dynamic scaling laws of typical thin-walled structures, an assumption of geometrically complete scaling laws is firstly proposed and numerically validated. For distorted models of disk thickness, in order to simplify the design procedure, a simplification condition is proposed and applied to the first 10 orders' distorted scaling laws (blade-dominated vibrations) by combining sensitivity analysis. Next, the 11th-14th orders' distorted scaling laws are determined for disk-dominated vibrations. Numerical validation demonstrates that distorted scaling laws possess a good accuracy. Finally, the applicability of these new scaling laws is validated by the experimental data. The results indicate that, by using the new scaling laws, the simple models can predict vibration characteristics of blisk by employing similitude models. [ABSTRACT FROM AUTHOR]
Copyright of Mechanics Based Design of Structures & Machines is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Prediction of vibration characteristics of blisks using similitude models.
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  Data: <searchLink fieldCode="AR" term="%22Luo%2C+Zhong%22">Luo, Zhong</searchLink><relatesTo>1</relatesTo><i> zhluo@mail.neu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Wang%2C+You%22">Wang, You</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Zhai%2C+Jingyu%22">Zhai, Jingyu</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Zhu%2C+Yunpeng%22">Zhu, Yunpeng</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Wang%2C+Deyou%22">Wang, Deyou</searchLink><relatesTo>5</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Mechanics+Based+Design+of+Structures+%26+Machines%22">Mechanics Based Design of Structures & Machines</searchLink>. 2019, Vol. 47 Issue 2, p121-135. 15p.
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  Data: <searchLink fieldCode="DE" term="%22Scaling+laws+%28Statistical+physics%29%22">Scaling laws (Statistical physics)</searchLink><br /><searchLink fieldCode="DE" term="%22Thin-walled+structures%22">Thin-walled structures</searchLink><br /><searchLink fieldCode="DE" term="%22Airplane+motors%22">Airplane motors</searchLink><br /><searchLink fieldCode="DE" term="%22Thickness+measurement%22">Thickness measurement</searchLink><br /><searchLink fieldCode="DE" term="%22Vibration+%28Mechanics%29%22">Vibration (Mechanics)</searchLink>
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  Label: Abstract
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  Data: This study investigates the determination approach of distorted scaling laws for predicting the dynamic characteristic of an aero engine's blisk. Based on the dynamic scaling laws of typical thin-walled structures, an assumption of geometrically complete scaling laws is firstly proposed and numerically validated. For distorted models of disk thickness, in order to simplify the design procedure, a simplification condition is proposed and applied to the first 10 orders' distorted scaling laws (blade-dominated vibrations) by combining sensitivity analysis. Next, the 11th-14th orders' distorted scaling laws are determined for disk-dominated vibrations. Numerical validation demonstrates that distorted scaling laws possess a good accuracy. Finally, the applicability of these new scaling laws is validated by the experimental data. The results indicate that, by using the new scaling laws, the simple models can predict vibration characteristics of blisk by employing similitude models. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Mechanics Based Design of Structures & Machines is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1080/15397734.2018.1481427
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      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 15
        StartPage: 121
    Subjects:
      – SubjectFull: Scaling laws (Statistical physics)
        Type: general
      – SubjectFull: Thin-walled structures
        Type: general
      – SubjectFull: Airplane motors
        Type: general
      – SubjectFull: Thickness measurement
        Type: general
      – SubjectFull: Vibration (Mechanics)
        Type: general
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      – TitleFull: Prediction of vibration characteristics of blisks using similitude models.
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            NameFull: Luo, Zhong
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            NameFull: Wang, You
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            NameFull: Zhai, Jingyu
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            NameFull: Zhu, Yunpeng
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            NameFull: Wang, Deyou
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            – D: 01
              M: 04
              Text: 2019
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              Y: 2019
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              Value: 47
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            – TitleFull: Mechanics Based Design of Structures & Machines
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