Optimization analysis of non-contact ultrasonic degradation system based on synchronous resonance of multiple modes

• Main Authors: Longxue Qiao, Yaohua Du, Feng Chen, Jinlong Wu, Taihu Wu
• Format: Article
• Language: English
• Published: JVE International 2016-03-01
• Series: Journal of Vibroengineering
• Subjects: non-contact; ultrasonic degradation; diaphragm; natural frequency; modal analysis; frequency of gradient
• Online Access: https://www.jvejournals.com/article/16411

To solve the defects of low degradation efficiency and high cross-contamination risk in the conventional ultrasonic processor, a non-contact ultrasonic degradation system was developed. Through finite-element modal analysis, the natural frequencies of the first ten modes of the diaphragm with dome-shaped structure were found to have a ladder-like distribution, which provides a possibility to utilize the synchronous resonance of multiple modes. The effects of curvature radius, thickness and preload force on the synchronous resonance of multiple modes are studied using the control variate method, and then the structural parameters and the preload force are optimized. Based on these results, the diaphragm was manufactured, the experimental platform of the non-contact ultrasonic degradation was established, and its degradation efficiency was evaluated. The experimental results proved that the non-contact ultrasonic degradation system was able to effectively degrade Bacillus atrophaeus.