Q460疲劳损伤的非线性导波检测及寿命预测  

Nonlinear Guided Waves Detection and Life Prediction of Fatigue Damage of Q460

作　　者：郭宇 贾攀 丁涛涛 朱武军 GUO Yu;JIA Pan;DING Taotao;ZHU Wujun(Jiangsu XCMG State Key Laboratory Technology Co.,Ltd.Xuzhou,221004,China;State Key Laboratory of Intelligent Manufacturing of Advanced Construction Machinery Xuzhou,221004,China;School of Mechanical and Power Engineering,East China University of Science and Technology Shanghai,200237,China)

机构地区：[1]江苏徐工国重实验室科技有限公司,徐州221004 [2]高端工程机械智能制造国家重点实验室,徐州221004 [3]华东理工大学机械与动力工程学院,上海200237

出　　处：《振动．测试与诊断》2024年第5期987-992,1042,共7页Journal of Vibration,Measurement & Diagnosis

基　　金：国家自然科学基金资助项目(12004114)。

摘　　要：钢结构在实际工况环境中受到瞬态和重复载荷影响会发生损伤,为保障设备的安全运行,需要针对较易发生损伤的关键性钢结构进行健康监测和寿命评估。首先,利用非线性超声导波具有对微纳尺度损伤敏感以及检测效率高等优点,分别采用离线和在线非线性超声导波检测方法对Q460高强钢疲劳损伤试样进行检测和表征,构建了非线性超声参量与疲劳寿命之间的关系曲线;其次,利用非线性超声参量与疲劳寿命之间的关系曲线构建了Q460高强钢疲劳寿命评估方法,在损伤状态检测的同时实现剩余寿命的预测。离线和在线检测试验结果表明,非线性超声参量随疲劳寿命呈现先增后减的变化趋势,且在疲劳寿命为60%附近出现峰值。To ensure the safe operation of equipment,it is necessary to conduct health monitoring and life assessment for key steel structures susceptible to damage.Firstly,nonlinear ultrasonic guided waves,which offer high detection efficiency and sensitivity to micro-damage,are used for both off-line and on-line nonlinear detection methods to assess the fatigue damage of Q460 high-strength steel.The relationship between nonlinear ultrasonic parameters and fatigue life curve is established.Secondly,a fatigue life evaluation method for Q460 highstrength steel is established based on the relationship curve between nonlinear ultrasonic parameters and fatigue life.Both off-line and on-line experimental results show that the nonlinear ultrasonic parameter increase first and then decrease with the fatigue life,and the peak value appears when the fatigue life is near 60%.

关 键 词：Q460高强钢 疲劳损伤 非线性超声参量 寿命预测 

分 类 号：TH113.1[机械工程—机械设计及理论] TH114