Investigation Into Vibration Characteristic in Vibrothermography

• 来源期刊: 光子传感器（英文版）
• 关键词: Vibrothermography vibration characteristic “double-mass-three-spring” model
• 年，卷（期）: 2019,（2）
• 页码范围: 108-114
• 页数: 7页
• 语种: 英文
• DOI: 10.1007/s13320-019-0529-x

摘要

Vibration characteristic plays an important role in vibrothermography,which directly affects the heating during the test.In this work,involving all the contacts in the vibrothermography,the “double-mass-three-spring” model is established to explore the vibration characteristic.The obtained results show that ultrasonic gun vibrates at fundamental frequency (FF),while the specimen vibrates at multi-frequencies including FF,2FF,3FF,and 4FF,which is validated through experimental investigation results.Additionally,the model proposed in this work reveals a high order harmonics in the vibrothermography test and makes the specimen conduct the steady vibration,which indicates that the model is closer to the practical equipment and can ensure the heating efficiency induced by vibration of specimen to improve the detection capability.