Critical-speed Increase of Optical Disk by Applying Residual Stresses

잔류응력 부과에 의한 광디스크의 임계속도 증가

  • Received : 2013.02.27
  • Accepted : 2013.05.09
  • Published : 2013.05.31


Through the data transfer race in industry since 1990s, the operational speed of optical disk drive(ODD) becomes commonly over 10,000 rpm. Such high speed operation inevitably causes the vibration, which is also the disturbances in the read-write process of pick-up servo-controller. Generally the vibration disturbance problem can be solved by the vibration isolation using the rubber mount and the increase of robustness of the pick-up servo-controller. Optical disk itself has not been targeted for the vibration reduction, because it is manufactured under the standardized format. In this paper we focused on the increase of critical speed of optical disk, that is, the improvement of dynamic characteristics, with the control of residual stresses which are come from the injection molding process. To do this, first, the residual stresses induced from the injection molding process are calculated using finite element method. The major design parameters of the process conditions are flow rate and melt temperature, which control the residual stresses in optical disk. Second, the critical speed of optical disk is calculated with modal analysis considering residual stress distributions. It was found out that the critical speed can be improved by the control of operational parameters in the injection molding process.


Optical disk;Optical disk drive;Residual stress;Critical speed;Injection molding


Supported by : 동양미래대학교


  1. N. W. Kim, K. W. Kim, H.-C. Sin, "A Design of a Dynamic Vibration Absorber for a DVD${\pm}$RW Drive"," IEEE Trans. on Consumer Electronics, Vol. 53, No. 3. pp. 956-961, 2007. DOI:
  2. J. Chung, D.-S. Ro, "Dynamic Analysis of an Automatic Dynamic Balancer", J. of Sound and Vibration Vol. 231, No.2, pp. 375-391, 2000. DOI:
  3. S. J. Park, S. K. Kim, C. Y. Lee, "Vibration Characteristics and Birefringence of Optical Disk Considering Initial Stress," Proceedings of SPIE, Vol. 3786, pp. 106-166, 1999. DOI:
  4. S.-Y. Lee, S. Kim, "Design and Vibration Analysis of a New Optical Disk with Initial Stress," J. of Information Storage and Processing Systems, Vol. 3, No. 1, pp. 177-184, 2001.
  5. H. Lamb, R. V. Southwell, "The Vibration of a Spinning Disk," Proceeding of the Royal Society, Vol. 99, pp.272-280, 1921.
  6. C. D. Mote, Jr., "Free Vibration of Initially Stressed Circular Disks," ASME J. of Engineering for Industry. Vol. 89. pp.258-265, 1965. DOI:
  7. J. T. Chung, N. C. Kang, J. M. Lee, "A Study on Free Vibration of a Spinning Disk," KSME Journal, Vol. 10, No. 2, pp. 138-145, 1996. DOI:
  8. W.-C. Park, J.-K. Lee, I.-G. Kim, Y.-S. Park, "Study on Vibration Induced by Fluid at a Water Pressure Reducing Valve through Structure-Fluid Coupled Analysis," J. of the Korea Academia-Industrial Cooperation Society, Vol. 13, No. 10 pp. 4371-4377, 2012. DOI:
  9. A. A. Renshaw, C. D'Angelo, C. D. Mote, "Aerodynamic Excited Vibration of a Rotating Disk", J. of Sound and Vibration, Vol. 177, No. 5, pp. 577-590, 1994. DOI:
  10. S.-Y. Lee, D.-W. Yoon, K. Park, "Aerodynamic Effect on Natural Frequency and Flutter Instability in Rotating Optical Disk", Microsystem Technologies, Vol. 9, pp. 369-374, 2003. DOI: