Numerical simulation of crack detection on key railway structures using guided waves

摘要：

　　In view of the increasing demand for the train services which results in higher speed and heavier axle loads,failure due to fatigue damage is likely to occur especially at the key rail components such as the joints of bogie frame and the couplers for connecting rolling stocks.This paper presents a finite element method to detect the micro-crack at critical locations-the joints on a bogie frame using miniature surface-mounted piezoelectric wafers based on nonlinear Lamb-wave technique.When a selected mode of Lamb waves interacted with the crack,second harmonics were induced due to the contact acoustic nonlinearity(CAN)caused by the crack.The received guided wave signals were then transformed from the time domain to the frequency domain in order to observe the nonlinear characteristics of ultrasonic guided waves propagating in a damaged medium.The results illustrated that the generation of second harmonic is feasible as an indication of micro-crack existence on key railway structures.

关键词： nonlinear guided waves finite element method bogie frame crack detection structural health monitoring

作者: Yu Fung Lee Ye Lu Wing Kong Chiu Iman Salehi

作者单位: Department of Civil Engineering,Monash University,Clayton VIC 3800,Australia Department of Mechanical & Aerospace Engineering,Monash University,Clayton VIC 3800,Australia Institute of Railway Technology,Monash University,Clayton VIC 3800,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: 59-69

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）