پیوندهای مفید
آمار
| تعداد نشریات | 9 |
| تعداد شمارهها | 446 |
| تعداد مقالات | 5,719 |
| تعداد مشاهده مقاله | 8,025,139 |
| تعداد دریافت فایل اصل مقاله | 6,531,128 |
Effect of Concentrated Axial Harmonic Force on Lateral Vibration of a Mono- Disk Rotating Shaft | ||
| AUT Journal of Mechanical Engineering | ||
| مقاله 8، دوره 2، شماره 1، شهریور 2018، صفحه 91-96 اصل مقاله (2.07 M) | ||
| نوع مقاله: Research Article | ||
| شناسه دیجیتال (DOI): 10.22060/ajme.2018.12951.5485 | ||
| نویسندگان | ||
| M. R. Zeinolabedini1؛ M. Rafeeyan* 2 | ||
| 1Department of Mechanical Engineering, Yazd University, Yazd, Iran | ||
| 2Faculty of Mechanical Engineering, University of Yazd, Yazd, Iran | ||
| چکیده | ||
| Rotors are widely used in industry and studying their vibrations is important. Lateral vibration of the rotors during operation is more important than its other vibration modes such as axial and torsional. The aim of this paper is to determine the effects of loads axially exerted on the assembled disk on a rotor as an introduction to modeling common phenomena such as surge and chock in rotors. Therefore, in this paper, the effect of a concentrated axial force acted on disk on the lateral vibration of a jeffcott rotor is investigated. Also, the effect of unbalance force on vibration behavior of the rotor is studied. The equation of motion was derived from Timoshenko beam model. The set of governing equations for vibration analysis of the rotor consist of four coupled partial differential equations. Since the derived equations are complex and coupled, and they have time-varying coefficients, they are solved by a combination of Galerkin and Newmark methods. Numerical examples are analyzed. The accuracy of derived equations is verified for a simple beam. Results show that the axial load is considerably effective on the amplitude of the lateral vibration of the rotor. | ||
| کلیدواژهها | ||
| Jeffcott rotor؛ Axial load؛ Lateral vibration؛ Time response | ||
| مراجع | ||
|
[1] A. Musznynska, Rotor dynamics, Crc press, Taylor Francis Group, LLC. 2005. [2] H.D. Nelson, A finite rotating shaft element using Timoshenko beam theory, Journal of Mechanical Design, 102(4) (1980) 703-803. [3] S.L. Edney, C.H.J. Fox, E.J. williams, Tapered Timoshenko finite elements for rotor dynamics analysis, Journal of Sound and Vibration, 137(3) (1990) 463-481. [4] S. Chen, M. Geradin, Exact and direct modeling earing systemtechnique for rotor-bs with arbitrary selected degress-of-freedom, Shock and Vibration, (1994) 497-506. [5] S.H. Choi, C. Pierre, A.G. Ulsoy, Consistent modeling of rotating Timoshenko shafts subjected to axial loads, Journal of vibration and acoustics, 114(2) (1992) 249-259. [6] M. Ouyang, M. Wang, A dynamic model for a rotating beam subjected to axially moving forces, Journal of Sound and Vibration, 308 (2007) 674-682. [7] A. Askarian, S.M.R. Hashemi, Effect of axial force, unbalance and coupling misalignment on vibration of a rotor gas turbine, 14 th International Congress on Sound Vibration. Australia, 2007. [8] M. Nawal, A.L. Raheimg, Free vibration of simply supported beam subjected to axial force, Journal of Babylon University, 2012. [9] A.A. Motallebi, M. Poorjamshidian, Vibration analysis of a nonlinear beam under axial force by homotopy analysis method, Journal of Solid Mechanics, 6 (2014) 289-298. [10] K. Torabi, H. Afshari, Exact solution for whirling analysis of axial–loaded Timoshenko rotor using basic functions, 4 (2015) 97-108. [11] G. Genta, Dynamics of rotating systems, Springer Science & Business Media, 2007. [12] J. R. Hutchinson, Shear cofficients for Timoshenko beam theory, Journal of Applied Mechanics, 68(1) (2001) 87-92. [13] N.M. Newmark, A method of computation for structural dynamics, Journal of the engineering mechanics division, 85 (1959) 67-94. [14] G. Bassin, S.M. Brodsky, H. Wolkaff, Statics and Strength of Materials, McGRAW-Hill Book Company, 1979.
[15] J. Vance, F. Zeidan, B. Murphy, Machinery Vibration and Rotor Dynamics, John Wiley & sons, INC, 2010.
| ||
|
آمار تعداد مشاهده مقاله: 1,238 تعداد دریافت فایل اصل مقاله: 861 |
||