Experimental study on the influence of modal parameters of thin cylindrical shell coated with constrained layer damping

• Main Authors: Hui Li, Jia Cheng, Wei Sun, Bangchun Wen
• Format: Article
• Language: English
• Published: JVE International 2016-05-01
• Series: Journal of Vibroengineering
• Subjects: modal parameters; constrained layer damping; thin cylindrical shell; influence analysis
• Online Access: https://www.jvejournals.com/article/16805

This research has experimentally investigated on the influence on modal parameters of thin cylindrical shell coated with constrained layer damping (CLD). Firstly, based on vibration behavior of thin walled shell structure, an experiment system is established to measure modal parameters of the shell with high accuracy and efficiency, and the corresponding test methods and identification techniques which are suitable for the shell coated with CLD are proposed. Then, the shell is coated with different numbers and sizes of CLD pieces or in different coating positions of CLD rings, and modal parameters are obtained by the proposed test method. Finally, based on the accurate measured data, the influence on natural frequencies, mode shapes and damping ratios of TCS coated with CLD are analyzed and discussed in details. This research can provide technical support for CLD application on thin walled shell structure.