Study on pipeline hydraulic transient model considering uncertainty factors

During operation of long-distance water conveyance systems, uncertain factors such as pipeline mechanical properties, pipeline anchoring conditions, and water body characteristics may lead to deviations between numerical simulation results and actual operating conditions. To improve the accuracy of numerical simulations, a hydraulic transient model considering uncertainties was established based on the generalized Kelvin-Voigt model. The model is solved using the second-order Godunov scheme finite volume method, and its accuracy was verified through laboratory experiments and numerical simulations of complex hydraulic transient processes. The results showed that the constructed model can characterize the comprehensive pipeline properties through creep functions and accurately simulate the pressure peak attenuation in long-distance water conveyance pipeline systems. During complex hydraulic transient processes, the relative error of pressure wave peaks gradually increased as pressure waves continuously superimposed. In actual long-distance water conveyance projects, due to multiple uncertainty factors in flow channels, numerical errors will be further exacerbated with the repeated propagation of pressure waves. Therefore, adopting a high-precision hydraulic transient model can improve the accuracy of pressure fluctuation simulation and hydraulic safety monitoring.