Vibration Characteristics of a New Optical Disk with Initial Stress

• DOI: 10.22634/ksme-a.2000.24.10.2513
• Publication Date: 2000-01-01
• Authors: Jae-Gwan Kim; Seung-Yeop Lee
• Keywords: Critical speed; Optical disc; Natural frequency

Free vibration characteristics of an initially stressed CD/DVD disk, which is designed for increasing critical speeds current optical disks, are analyzed using the Rayleigh-Ritz technique based on variational formulations. Natural frequencies new disk depend membrane stresses caused by rotation as well residual imposed during cooling process injection molding. Critical calculated various initial patterns radial and circumferential stresses. Initially tensile increase natural all modes except zero nodal diameter mode, whose frequency independent stress. A with stress 0.5MPa shown to have its speed about 30 % higher than disk.