Risk Analysis and Optimization of Water Surface Deviation from Shafts in the Filling-Emptying System of a Mega-Scale Hydro-Floating Ship Lift

Hydro-floating ship lifts are a milestone in the field of high dam navigation. In order to ensure the running safety of a hydro-floating ship lift, the effective integration of a numerical simulation method and cloud model theory was carried out to deal with the hydrodynamic risks presented by water surface deviations from the shafts in the filling-emptying system such as a lock. In this study, the average values of water surface deviation from the shafts were 0.2, 0.22 and 0.24 m, through numerical simulation on a similar hydro-floating ship lift at the lifting heights of 80, 100 and 120 m, respectively. An increase in the lifting height causes the water surface deviation from the shafts to increase, and the hydrodynamic risk is greatly increased in the equal inertial pipeline filling-emptying system. In addition, the water surface deviations from the shafts of the equal inertial pipeline and longitudinal culvert filling-emptying system like a lock were compared. The longitudinal culvert was better at optimizing running safety in the filling-emptying system and dealing with the uncertainty of water surface deviation from the shafts. The results show that the numerical simulation method and cloud model theory can effectively control the risk of water surface deviation from the shafts and can be used to aid in decision-making for risk prevention in relation to hydro-floating ship lifts.

Automated summary

The study effectively integrated numerical simulation and cloud model theory to address the hydrodynamic risks presented by water surface deviations from the shafts in hydro-floating ship lifts. It was found that an increase in lifting height leads to a greater water surface deviation from the shafts and increased hydrodynamic risks in the filling-emptying system. Additionally, the longitudinal culvert was shown to be better at optimizing running safety and dealing with uncertainties in water surface deviations compared to the equal inertial pipeline system in a lock-like environment.