An analysis of a mask vibration considering contact with a damping wire

The mask vibration degrades the color purity in a CRT. Therefore, damping wires are put into contact with the mask to reduce vibration in a perfectly flat CRT. In this study, we analyze the mask vibration contacting with the damping wires using FEM. At first we calculate the natural frequencies and mode shapes of the mask by modal analysis, and compare them with the measured results to confirm our finite element model. The modal analysis of the wire is also performed to investigate resonance with the mask. Finally, the transient dynamic analysis of the mask contacting with the wires is performed. The mask vibration is measured to confirm our analysis results, and the measured results are in good agreement with those of the analysis.