Investigation of the Effect of Shroud on Natural Frequencies of a Rotating Multi Blade System

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KOOHESTANI S.

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Journal: Modares Mechanical Engineering Year:2019 | Volume:19 | Issue:8 Page(s): 1889-1896

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Information Journal Paper

Title

Investigation of the Effect of Shroud on Natural Frequencies of a Rotating Multi Blade System

Author(s)

KOOHESTANI S. | Issue Writer Certificate

Keywords

Natural FrequencyQ2

Multi Blade SystemQ1

ShroudQ1

Assumed Mode MethodQ1

Abstract

In this study, effect of Shroud on dynamic characteristics of a rotating Multi Blade System is investigated. The main aim of this study is to investigate the effect of Shroud stiffness and Shroud configuration on the system Natural Frequency. For this purpose, natural frequencies of various systems (in terms of the position, where the blade is connected to the Shroud and number of blades, which are connected together with a Shroud) via different degrees of Shroud stiffness and different configurations of Shroud have been compared to show how this parameters affect the natural frequencies of the system. In this study, the Shrouds have been considered as the discrete springs with corresponding stiffness values. The vibration frequency characteristics have been analyzed, using Assumed Mode Method along with Hamilton’ s law. Since in Multi Blade Systems such as turbines it is crusial to keep the system working frequencies far away from natural frequencies (in order to prevent the resonance phenomenon), based on the results of this paper, it is shown how the parameters of Shroud can remove the natural frequencies associated with some of the modes of the system from the work area.

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APA: Copy

KOOHESTANI, S.. (2019). Investigation of the Effect of Shroud on Natural Frequencies of a Rotating Multi Blade System. MODARES MECHANICAL ENGINEERING, 19(8 ), 1889-1896. SID. https://sid.ir/paper/178207/en

Vancouver: Copy

KOOHESTANI S.. Investigation of the Effect of Shroud on Natural Frequencies of a Rotating Multi Blade System. MODARES MECHANICAL ENGINEERING[Internet]. 2019;19(8 ):1889-1896. Available from: https://sid.ir/paper/178207/en

IEEE: Copy

S. KOOHESTANI, “Investigation of the Effect of Shroud on Natural Frequencies of a Rotating Multi Blade System,” MODARES MECHANICAL ENGINEERING, vol. 19, no. 8 , pp. 1889–1896, 2019, [Online]. Available: https://sid.ir/paper/178207/en

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