Study on simulation of non-destructive testing for pipeline defects by ultrasonic guided waves
The detection of defects in pipes is of very importance to the oil, chemistry, gas industry etc. The guided wave method that detects refection waves from defects is developed and proves to be effective. The disadvantages such as low speed and high cost in current non-destructive testing for defects in pipes, the influences of varying exciting frequency on the detection of defects are numerically simulated and analyzed both in straight and curved pipes. And the results suggest that, under the condition of certain wall thickness of pipes, the testing sensitivity increases at first as the exciting frequency increases along, and then it begins to decrease when the frequency arrives at a specific value. It is also concluded that the error in determining the defect locations increases too as the exciting frequency increases. These results have instructive significance on realizing long distance and rapid non-destructive testing for longitudinal ultrasonic guided waves in pipes. At last, the structure of ring transducer that can excite guided waves is also presented in the paper.
Pipeline defect Ultrasonic guided wave Numerical simulation Exciting frequency
HuYang Cheng Wang
National Key Laboratory For Electronic Measurement Technology, North University of China, Taiyuan, S State Key Laboratory for the Prevention and Control of Explosion Disasters, Beijing Institute of Tec
国际会议
哈尔滨
英文
238-242
2011-07-26（万方平台首次上网日期，不代表论文的发表时间）