Proceedings of the Korean Society for Noise and Vibration Engineering Conference (한국소음진동공학회:학술대회논문집)
- 2003.11a
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- Pages.1095-1100
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- 2003
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- 1598-2548(pISSN)
Dynamic Characteristics Research of DVD Disk due to Disk-Wall Gap
간격 변화에 따른 DVD 디스크의 동특성 연구
Abstract
Experimental studies on the aerodynamic coupling effect on natural frequencies, critical speed and flutter instability of DVD disks are investigated in this paper. The experimental results are compared with the theoretical analyses where the aerodynamic effects are represented in terms of elastic, lift and damping and stiffness components. The experiments are performed using a vacuum chamber and DVD disks rotating in vacuum, open and enclosure with several different gaps between disk and wall. The following three results are given. One is that the aerodynamic effect by the surrounding air reduces the natural frequencies and critical speeds of the vibration modes. The second is that natural frequency decreases as the disk-wall gap is decreased. Finally, it is shown that the disk vibration is reduced as the gap between the disk and the rigid wall decreases.
Keywords
- Critical speed;
- Flutter Speed;
- Air Induced Vibration;
- Rotating Disk;
- Fluid-Structure Interaction;
- CD/DVD
- 임계속도;
- 플러터 속도;
- 공기유동에 의한 진동;
- 회전 디스크;
- 유체-구조물 연성;