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Simulation in reduced scale hydraulic models of the mooring system of ships docked under the effect of the passage of other vessels (passing ship)

Esferra R., Bernardino J.C.M, Bezerra R., Pion L.M.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

2021

Vol. 15 No. 4

845--852

Vessels moored at port terminals may be subject to excessive strain on mooring lines, induced by other ships passing in their vicinity. This phenomenon is called hydrodynamic interaction, and well known in the international literature as Passing Ship. It occurs due to the displacement of the mass of water between the two vessels, which, consequently, induces hydrodynamic stresses on the two ships. Within this context, scale models are a powerful tool for hydrodynamics studies, being able of reproduce the complex water flow phenomena that take place around passing and moored ship. This paper presents a scale model technique to study the Passing Ship phenomenon and its application on a case study developed for the Santos Port. The study was based on the analysis of the results of simulations performed on a 1:170 scale model to compare the effect of various navigations conditions on the mooring lines of a docked ship.

Application of the Theil statistics to the calibration of a dynamic water supply model

Zimoch I., Łobos E.

Environment Protection Engineering

2010

Vol. 36, nr 4

105-115

This paper presents the procedures of the construction and calibration of hydraulic water supply system (WSS) models. In the research, the WSS in Cracow was used. The hydraulic model was built using the EPANET 2 computer program. For the evaluation of compatibility between operating parameters (pressure) obtained by simulation and real pressures in selected nodes (which form two time series) the Theil inconsistency statistics were applied. The method is not a very time consuming and allows us to find nodes at which the difference between the two time series is caused by a systematic error.