Experimental and numerical studies of the oblique defects in the pipes using a chaotic oscillator based on ultrasonic guided waves. (7th July 2015)

• Record Type: Journal Article
• Authors: Yang, Fei; Jing, Lin; Zhang, Weiwei; Yan, Yinzhong; Ma, Hongwei
• Is Part Of: Journal of sound and vibration. Volume 347(2015)
• Page Start: 218
• Page End: 231
• Publication Date: 2015-07-07
• Subjects: Sound -- Periodicals; Vibration -- Periodicals; Son -- Périodiques; Vibration -- Périodiques; Sound; Vibration; Periodicals; Electronic journals; 620.205
• DOI: 10.1016/j.jsv.2015.02.014
• Languages: English
• ISSNs: 0022-460X

Abstract

Abstract: The longitudinal ultrasonic guided waves in oblique defects pipes were investigated experimentally and numerically in the paper. A novel method of the defect detection for pipes is proposed based on the Duffing–Holmes chaotic oscillator. Five kinds of defects with inclined angle of 0°, 30°, 45°, 60° and 90° were discussed and analyzed, respectively. Based on the experiment, the corresponding simulations were conducted by using finite element software LS-DYNA. Both experimental and numerical results show that this proposed method could be used to inspect the weaker guided waves; and the reflection coefficient of echo increases with the decrease of the inclined angle.