中文摘要：

基于负压波法的管道泄漏监测系统误报警率较高，影响了其应用效果。生产现场的误报警数据表明，近30%的误报警来自泵站内的启泵操作，因此掌握启泵水击持续时间规律可以帮助监测系统降低误报警率。首先以启泵正压水击持续时间为因变量，以管道相关参数和流体的物性参数为自变量，假设了启泵正压水击持续时间在生成和传播阶段的数学模型；其次建立SPS管道仿真模型，获取了在不同参数组合下启泵正压水击持续时间的数据，并用单因素分析法和非参数统计法剔除了对启泵正压水击持续时间影响较小的参量；随后用多元线性回归方法对仿真数据进行拟合，求解了长输管道启泵正压水击持续时间的生成和传播阶段数学模型；最后根据现场试验数据验证了模型的有效性，并讨论了研究中存在的不足之处。研究结果有助于提高长输管道负压波泄漏检测技术的应用效果。

英文摘要：

Negative pressure wave-based pipeline monitoring system has a higher false alarm rate so as to affect application effects. False alarm data of production site shows nearly 30% of false alarms are given to pump start operation of the pump station, so it can help reduce false alarm rate of the monitoring system to master the pump start water hammer duration law. First, a mathematical model of pump start positive-pressure water hammer duration in the generation and propagation stage is supposed based on dependent variable of pump start positive-pressure water hammer duration and independent variable of pipeline related parameters and fluid physical parameters; a SPS pipeline simulation model is built to obtain the data of pump start positive-pressure water hammer duration under different parameter combinations, and the parameter with little effect on pump start positive-pressure water hammer duration is eliminated by means of single factor analysis method and multiple linear regression method; then, simulation data is fitted by means of the multiple linear regression method to solve the mathematical model for pump start positive-pressure water hammer duration law of long-distance pipeline at the generation and propagation stage; finally, the field test data is used for verifying effectiveness of the model and a discussion is made on shortcomings of the research. The research results can help improve application effects of negative pressure wave leakage monitoring technology for long-distance pipelines.