Browse > Article
http://dx.doi.org/10.9797/TSISS.2011.7.1.025

An Analysis of Damping Coefficients for Capillary Type Orifices on a Curved Stabilizer used in a High Speed Rotating Flexible Optical Disk System  

Song, Ki-Wook (대학원, 연세대학교 기계공학과)
Rhim, Yoon-Chul (정보저장기기연구센터, 연세대학교)
Publication Information
Transactions of the Society of Information Storage Systems / v.7, no.1, 2011 , pp. 25-30 More about this Journal
Abstract
In the last couple of years, the flexible optical disk(FOD) system that consists of a thin polycarbonate(PC) film of 95 ${\mu}m$ thick, a rigid stabilizer, and a high speed spindle motor has been spot-lighted as the next-generation optical system for archival use of digital data. The air film between the rotating disk and stabilizer provides a means for damping out the lateral disk vibrations. However, its damping-capability drops significantly as the rotational speed of the disk exceeds a specific limit and, eventually, the disk vibration propagates inward causing the whole span of the disk exhibits large vibration amplitudes. Based on the numerical simulations as well as the experimental results, the present work aims to evaluate the damping coefficient of the air-film near the outer region of the disk where the capillary type orifices are applied to the edge of the curved stabilizer.
Keywords
감쇠계수;유연 디스크;곡면 안정기;감쇠 오리피스;축 방향 진동;
Citations & Related Records
연도 인용수 순위
  • Reference
1 G. Popov, S. Sankar, 1995, "Modelling and Analysis of Non-linear Orifice Type Damping in Vibration Isolators", Journal of Sound and Vibration, 183(5), Page 751-764   DOI   ScienceOn
2 B. T. Zinn, 1970, "A Theoretical Study of Non-linear Damping by Helmholtz Resonators", Journal of Sound and Vibration, 13(3), Page 347-356   DOI   ScienceOn
3 Onagi, N., Aman, Y., Murata, S. and Uchida, K., 2004, "High-Density Recording on Air-Stabilized Flexible Optical Disk", Jap. J. Appl. Phys., Vol. 43, No. 7B, pp 5009-5013   DOI
4 Abdelrasoul M. M. Gad., Yoon Chul Rhim, 2008, "Numerical Simulations of a Flexible Disk Rotating Close to a Rigid Rotating Wall", Jap. J. Appl. Phys, Vol. 47, No. 7, Page 5835-5841   DOI
5 H. Lamb and R.V. Southwell, 1921, "The Vibrations of a Spinning Disk," Proceedings of the Royal Society of London, Vol.99, No.699, pp.272-280   DOI
6 G.G. Adams, 1980, "Analysis of the flexible disk/head interface," ASME Journal of Lubrication Technology, Vol.102, pp.86-90   DOI
7 K. Yasuda, T. Torii, and T. Shimizu., 1992, "Self-Excited Oscillations of a Circular Disk Rotating in Air," JSME International Journal, Series III, Vol.35, No.3, pp.347-352
8 G. Naganathan, S. Ramadhayani and A. K. Bajaj, 2003, "Numerical Simulation of Flutter Instability of a Flexible Disk Rotating Close to a Rigid Wall," Journal of Vibration and Control, Vol.9, pp.95-118   DOI