基于管体变形实时监测的挠性接管寿命评估方法

Research on the evaluation method of the filament-wound flexible pipe′s life based on the real-time monitoring the deformation of the pipe body

针对凯夫拉纤维增强型挠性接管(FW-FP)管体发生局部异常变形而导致管体破裂失效的问题,提出一种基于管体变形实时监测的挠性接管寿命评估方法。融合电阻感应原理和光纤光栅(FBG)传感原理,在建立管体结构模型的基础上,采用数值计算和有限元仿真方法,对管体轴向变形、径向变形、充压变形及局部异常变形特性进行分析,提取出区分管体正常变形和局部异常变形的特征阈值。该方法能够有效识别管体的局部异常变形,实时评估挠性接管的工作寿命。

Aiming at the problem of the failure of the pipe body by the local abnormal deformation of the filamentwound flexible pipe(FW-FP).an evaluation method of the FW-FP′s life based on the real-time monitoring the deformation of the pipe body is proposed.the principle of resistance induction and the principle of fiber Bragg grating sensing are fused,on the basis of establishing the model of the FW-FP′s structure,numerical calculation and finite element simulation are used,the axial deformation,radial deformation,compaction deformation and local abnormal deformations’characteristics of the pipe body are analyzed,the characteristic threshold of normal deformation and local abnormal deformation is extracted.The method can effectively identity the FW-FP′s local abnormal deformation,and the FW-FP′s service life can be real-time judged.