摘要
本文通过有限元数值仿真建模,模拟超声导波L(0,1)和F(1,1)两种模态在杆中的传播及反射,分别找到了不同轴向、周向和深度缺陷时,超声导波传播及反射的规律。缺陷大小变化时,两种模态的反射系数变化趋势一致,缺陷大小不变时,F(1,1)模态的反射系数比L(0,1)模态的反射系数高。缺陷深度不同时,两种模态反射系数的变化趋势出现差别。研究结果可为杆结构腐蚀导波检测提供参考。
The propagation and reflection of ultrasonic guided wave L(0,1)and F(1,1)in rods are simulated by finite element numerical simulation modeling in the paper,and the propagation and reflection rules of ultrasonic guided wave are found when the axial direction,circumferential direction and depth defect are different.The reflection coefficient change trend of two modes is constant when the defect size is changed.The reflection coefficient of F(1,1)mode is higher than that of L(0,1)mode when the defect size remains unchanged.The variation trend of the reflection coefficient of the two modes is different when the defect depth is different.The research results can provide reference for the detection of corrosion guided wave in rod structures.
作者
丁鹏
马光飞
关磊
DING Peng;MA Guangfei;GUAN Lei(Product Quality Standard Research Institute,Ministry of Water Resources,Hangzhou 310012,China;Hangzhou Institute of Mechanical Design,Ministry of Water Resources,Hangzhou 310012,China)
出处
《水利建设与管理》
2020年第10期1-5,共5页
Water Conservancy Construction and Management
基金
国家大坝安全工程技术研究中心开放基金——水利电力工程圆杆腐蚀导波检测方法研究(CX2019B03)。
关键词
导波
反射系数
仿真
无损检测
guided wave
reflection coefficient
simulation
NDT
