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http://dx.doi.org/10.5050/KSNVE.2014.24.8.583

Vibration and Stability Analysis of a Multi-stepped Shaft System of Turbo Compressor  

Seo, Jung-Seok (Department of Mechanical Engineering, Chungnam National University)
Kang, Sung-Hwan (Department of Mechanical Engineering, Chungnam National University)
Park, Sang-Yoon (Department of Mechanical Engineering, Chungnam National University)
An, Chang-Gi (Department of Mechanical Engineering, Chungnam National University)
Song, Ohseop (Department of Mechanical Engineering, Chungnam National University)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.24, no.8, 2014 , pp. 583-591 More about this Journal
Abstract
The mathematical modeling on the free vibration and stability of a multi-stepped shaft of turbo compressor is performed in this study. The multi-stepped shaft is modeled as a non-uniform Timoshenko beam supported by anisotropic bearings. It is assumed that the shaft is spinning with constant speed about its longitudinal axis and subjected to a conservative axial force induced by front and rear impellers attached to the shaft. The structural model incorporates non-classical features such as transverse shear and rotary inertia. A structural coupling between vertical and lateral motions is induced by Coriolis acceleration terms. The governing equations are derived via Hamilton's variational principle and the equations are transformed to the standard form of an eigenvalue problem. The implications of combined gyroscopic effect, conservative axial force, bearing stiffness and damping are revealed and a number of pertinent conclusions are outlined. In this study analytical results are compared with those from ANSYS finite element analysis and experimental modal testing.
Keywords
Rotordynamics; Multi-stepped Shaft; Divergence; Turbo Compressor;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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