基于希尔伯特黄变换的高压输气管道爆裂振动信号时频特性分析

Time-frequency analysis of vibration signals generated by high-pressure gas pipeline bursting based on the Hilbert-Huang transform

为研究高压输气管道的爆裂冲击振动危害效应,对大口径X90管道实施了全尺寸爆破试验研究。试验测试了裂纹扩展速度、管内气体压力变化和地表的振动速度,并对结果进行了分析,揭示了管道爆裂地震波的形成机理及传播规律。在处理数据过程中,运用希尔伯特-黄变换(HHT)技术对振动信号进行了分析,准确获取了信号的时间-频率-能量分布特征。同时,验证了HHT方法在揭示隐含在数据中的物理意义方面具有的优越性能,适用于分析动态非平稳振动信号。

In order to study the shock and vibration harmful effect generated by high-pressure gas pipeline bursting,full-scale bursting experiments of X90 pipes were conducted in this study.In the experiments,the crack velocity,pressure variation inside the pipe and vibration velocity on the ground were measured.The experimental results were analyzed to reveal the formation mechanism and propagation law of the seismic waves generated by pipes bursting.In the data processing process,the Hilbert-Huang Transform(HHT)was used to analyze the vibration signals,and the time-frequency-energy distribution of the signals has been shown by HHT precisely and clearly.Additionally,this paper has verified that HHT has superior performance in revealing hidden physical meanings in data and is suited for analyzing non-stationary dynamic vibration signals.