Elastic connection disk subjected to periodically fluctuating transmitted torque and rotational speed

Pei, Yong-Chen and Chatwin, Chris (2012) Elastic connection disk subjected to periodically fluctuating transmitted torque and rotational speed. Journal of Sound and Vibration, 331 (13). pp. 3083-3095. ISSN 0022460X

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Abstract

Involving the intrinsic power transmission torque/speed coupling characteristics of prime-movers, a rotating elastic connection disk subjected to periodically fluctuating transmitted torque and rotational speed generated by the fluctuation of external loads is investigated. Using Galerkins method, the rotating elastic connection disk is modeled as a parametrically excited gyroscopic system. The effects of the torque/speed coupling, transmitted torque fluctuation amplitude and frequency, and constant parts of the transmitted torque and the rotational speed on the system dynamic stability are explored for the disk modes possessing different nodal diameters. The rotational speed, transmitted torque and their fluctuations can all result in system instability of the elastic connection disk. The instability can be suppressed or avoided by operating at small amplitude and low frequency of the transmitted torque fluctuation, and by operating in the weakly coupled torque/speed regime of the prime-movers. Low rotational speed avoids the instability in the case of a small transmitted torque, but medium rotational speed operation is valuable to suppress the instability induced by a large transmitted torque and its fluctuation. Instability parameter regions for the positive and negative torque/speed coupling coefficient are roughly similar in shape, but there are some differences in the value of the instability coefficient. © 2012 Elsevier Ltd. All rights reserved.

Item Type: Article
Keywords: Coupling characteristic; Coupling coefficient; External loads; Gyroscopic system; Low frequency; Nodal diameter; Parameter regions; Prime-movers; Rotational speed; Small amplitude; System Dynamics; Transmitted torque
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Subjects: T Technology
T Technology > TJ Mechanical engineering and machinery
T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK2000 Dynamoelectric machinery and auxiliaries Including generators, motors, transformers
Depositing User: Chris Chatwin
Date Deposited: 05 Jul 2012 14:04
Last Modified: 04 Sep 2012 13:43
URI: http://sro.sussex.ac.uk/id/eprint/39950

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