WHIRLING EFFECT ON BEARINGS OF MARINE LINE- SHAFTS UNDER EXTERNAL EXCITATIONS | ||||
| The International Conference on Applied Mechanics and Mechanical Engineering | ||||
| Article 4, Volume 2, 1st Conference on Applied Mechanical Engineering., May 1984, Page 203-213 PDF (2.35 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/amme.1984.49422 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| H. M. METWALLY1; O. Y. SHOULA2 | ||||
| 1Associate Professor, University of Alexandria, Faculty of Engineering, Mechanical Engineering Dept. | ||||
| 2Naval Architect & Member of Royal Institution of Naval Architects. | ||||
| Abstract | ||||
| Due to the ecentricity of thrust force acting on propeller blades, marine shafts experience whirl while rotating. This directly affect the reactions of the different supports, and consequently causes wear of shaft bearings. This paper is concerned with simplifying the concept for the shafting system in order to estimate the frequencies of whirl and propeller tip deflections. The work is dealing with both; three and four span systems with overhaged propeller. The problem is also studied for both mass and massless shafts. For mass-less shafts systems of any number of spans, general formulae for calculating the frequency of whirl and the deflection of propeller tip are proposed. For shaft systems of distributed mass, a procedure is suggested to calculate frequencies as well as deflections at different supports. | ||||
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