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| Research on dispersion characteristics of ultrasonic guided waves in multilayer cylinder anchored structures |
| Received:March 27, 2022 Revised:May 22, 2022 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20220327001 |
| KeyWord:non-destructive testing anchored rock bolt global matrix method ultrasonic guided wave disperse software |
| Author | Institution |
| 白雨佳 |
太原理工大学 矿业工程学院, 太原 |
| 张昌锁 |
太原理工大学 矿业工程学院, 太原 |
| 牛潘宇 |
北京理工大学 爆炸科学与技术国家重点实验室, 北京 |
| 张玥 |
太原理工大学 矿业工程学院, 太原 |
| 赵金昌 |
太原理工大学 矿业工程学院, 太原 |
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| Abstract: |
| The efficiency and convenience of ultrasonic guided wave non-destructive testing (NDT) has allowed it to become one of the key methods used to determine the grouting quality of anchored rock bolts.However,the multimodal,dispersive,and energy leakage-prone nature of ultrasonic guided waves in an anchored structure introduces uncertainties,in terms of signal collection,to this form of NDT.Multilayer cylindrical theoretical rock bolt models were established using the global matrix method based on elastic dynamic theories to obtain the dispersion equations for the models.The quadratic extrapolation and bisection methods were used to accurately solve the dispersion equations by dealing with the difficult problems brought on by the categorization,intersection,and bifurcation of the dispersion curves.This study’s solution of the dispersion equation can act as a basis for and allows the establishment of a Made-In-China commercial multilayer cylindrical rock bolt model dispersion equation solution software that is comparable to that of the foreign copyrighted software,Disperse.Furthermore,the results of this study agree with the results from Disperse.The dispersion curves in laboratory finite anchored structures were also calculated with this software,verifying the great difference between low-frequency guided waves in finite and infinite structures,while Disperse did not give relevant numerical examples for the dispersion characteristics of this structural feature. |
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