Study On The Ship Hydrodynamic Characteristics At Mooring State Of Inland River Wharf

Recently,with the implementation of the national strategy of the Yangtze River Economic Belt,the construction of dock is changing with each passing day and the number is increasing.The hydrodynamic performance of the moored vessels at the docks is an important technical indicator for measuring the safety of berthing vessels.In this paper,the hydrodynamic performance of the ship moored at the wharf in the middle river is studied to obtain the change rule of the hydrodynamic parameters of the moored ship.Guide the ship's mooring operations to avoid safety accidents and ensure shipping safety.At present,most of the studies on the mooring of inland river docks are based on numerical simulation methods.This paper first used the AQWA module in ANSYS based on the theory of three-dimensional potential flow,and then verified it through the dock mooring test.The main research contents are as follows: point:1.Conduct on-site investigations of a terminal and mooring ships in the river,and obtain relevant parameters such as terminals,mooring vessels,mooring systems,and water flow.2.Research on frequency domain of ship hydrodynamic performance.In the frequency domain,hydrodynamic analysis of ships with water depth,presence or absence of wharfs and wave angles was carried out to obtain the ship's 6 degrees of freedom(surge,sway,heave,pitch,roll,yaw).The amplitude response operator,additional mass,radiation damping and other basic parameters.The parameters under various operating conditions were compared to analyze the effect of water depth in the frequency domain,presence of wharfs and wave angles on the hydrodynamic performance of the ship.3.Research on ship hydrodynamic performance in time domain.According to the mooring specification,the mooring system is designed to analyze the 6-DOF motion response,mooring line tension and fender pressure of the moored ship under the joint action of wind,waves and currents in the time domain.4.The influence of single factors.According to the mooring system specification,the mooring system is designed to study the influence of the mooring angle,the numberof ropes and the wave directions on the ship's hydrodynamic forces under the joint action of wind,waves and currents in the time domain.The kinematic characteristics of the ship are derived from the effects of the mooring angle and the number of cables on the ship's hydrodynamic forces.5.Under different environmental conditions,different mooring system conditions are tested,and numerical simulations in the time domain are verified to obtain errors.And then error analysis is performed,and the kinematic characteristics of the ship under mooring are obtained.