Numerical simulation and application of acoustic emission signal from gas pipeline leakage
Acoustic emission signals are commonly used for pipeline leakage detection. At present, the main method for studying pipe-line leakage acoustic emission signals is the combination of experiments and signal analysis. There is relatively little research on simula-ting the acoustic emission signals of pipeline leakage. In order to study the fluid-structure interaction vibration response characteristics of gas pipeline leakage, a three-dimensional model of the leakage pipeline was established. The one-way transient fluid-structure inter-action method was used to carry out the finite element simulation analysis of the model, and the acoustic emission signal of pipeline vi-bration during pipeline leakage was simulated. The acoustic emission signal generated by pipeline wall vibration were recorded by ex-perimental acoustic emission sensors. The results indicate that the error between the numerical simulation results and experimental re-sults is only 0. 3％. Therefore, the simulation result shows a good agreement with the one obtained in the experiment. The acoustic e-mission simulation signal has been applied to the wavelet base selection, and this study provides a theoretical reference for subsequent pipeline leakage detection research.
pipeline leakagefluid-structure couplingpressure fluctuationacoustic emission signal
万方数据
维普
