Bolt loosening detection using vibro-ultrasonic modulation

摘要：

　　This paper presents a preliminary study of a bolt loosening detection technique using vibro-ultrasonic modulation(VAM).The technique is based on a physical phenomenon that a high frequency probing excitation(fH)is modulated by a low frequency pumping excitation(fL).This study experimentally investigates the relationship between the degree of bolt loosening and sideband generation.A nonlinear index β is used to quantify the sideband generations around the probing wave frequency,which reflects the level of contact nonlinearity.β is found to be quantitatively related to the residual torque after the bolt is loosened to a certain degree.

关键词： Bolted joints vibro-ultrasonic modulation bolt loosening contact nonlinearity sideband generation

作者: Y.Xue C.T.Ng

作者单位: School of Civil,Environmental and Mining Engineering,The University of Adelaide,Adelaide,Australia

会议类型: 国际会议

会议名称: The 7th World Conference on Structural Control and Monitoring(7WCSCM)(第七届结构控制与监测世界大会)

会议地点: 青岛

会议语种:英文

页码: 79-85

在线出版日期: 2018-07-22（万方平台首次上网日期，不代表论文的发表时间）