均值控制图法在泵站压力管道损伤识别中的应用

Application of Mean Control Chart Method in the Damage Identification of Pressure Pipe of Pump Station

针对高扬程泵站压力管道由于流激振动引起的结构损伤问题,基于统计模式理论,提出了采用均值控制图识别压力管道损伤的方法。首先通过获取正常状态和待识别状态下实测数据的响应信息,构建损伤诊断的系统模型,对大量数据信息进行统计计算,然后提取特征值,优化特征向量,最后采用均值控制图法对压力管道损伤部位进行识别。实例分析结果表明,基于统计模式识别的均值控制图法,可以直观精确地对压力管道是否存在损伤做出识别,因此可以作为工程中大型泵站压力管道损伤识别的重要方法。

The pressure pipe of high-lift pump station can have structural damages due to flow-induced vibration,and the mean control chart method based on the statistical pattern theory was proposed to identify the damage.First,the response information of the measured data was obtained under the normal and to-be-detected conditions,which can be used to develop the system model for damage diagnosis.Then,statistical calculations were performed on numerous data information to extract the eigenvalue and optimize the eigenvector.Finally,the mean control chart method was used to identify the damage in the pressure pipe of the pump station.The results showed that the mean control chart method can identify any damage in the pressure pipe intuitively and accurately,and therefore it can be used as an important method for damage identification of pressure pipe of pump station.