System capable of monitoring container ship flotation condition and stability during mooring loading and unloading for multiple shore bridges

Abstract

The invention discloses a system capable of monitoring a container ship flotation condition and stability during mooring loading and unloading for multiple shore bridges. Small-amplitude ship swing motion stimulated during mooring loading and unloading and a dynamic inclination sensor loaded on a shore bridge lifting appliance are used, according to information of dock stormy waves, a dock tidal level, stow work, a ship type structure, a lifting appliance position, a sling tightness degree, rotary lock opening and closing, a lifting appliance inclination angle and the like, data monitored through multiple shore bridge lifting appliances are stacked, spliced and integrated, mooring constraints are removed, loading and unloading stimulated local free ship swing is calculated, an optimal fitting parameter of a non-linear curve model is solved, average draught data are obtained at the moment of starting operation of a box and loosening a cable, algorithms of estimating the initial stability corrected through a free liquid face and the like are used for solving a natural period, a steady-state inclination angle and the initial stability, real-time monitoring and early warning of the container ship flotation condition and the stability during mooring loading and unloading can be achieved, data reference is provided for a dock and a shipper to take stowage or ballast adjustment in time, and cargo falling into water, ship overturn, channel blockage and other accident disasters caused by dock loading and unloading work can be prevented.

Description

technical field [0001] The invention relates to a method and device for monitoring the floating state and stability of a container ship during mooring loading and unloading, especially for single or multiple container quay cranes working together, utilizing the small ship shaking motion and The dynamic inclination sensor installed on the quay crane spreader, according to the information of the wharf wind and wave, wharf tide level, stowage operation, ship structure, spreader position, sling tightness, twist lock opening and closing, spreader inclination, etc., through the multi-quay crane Superimposition, splicing and integration of inclination data, local free ship sway without mooring constraints and loading and unloading excitation, best fitting parameters for solving nonlinear curve models, average draft obtained instantaneously at the beginning of boxing and loosening cables, estimation corrected by free liquid surface The high initial stability algorithm solves the natur...

AI Technical Summary

Problems solved by technology

[0026] The technical problem to be solved by the present invention is: due to the double-sided collision constraints of bollard mooring force and fender squeeze force during mooring loading and unloading, and the intermittent random excitation of the load of the spreader, the traditional measurement method It is difficult to accurately measure the ship's natural period, steady inclination and average draft during mooring loading and unloading, so it is impossible to monitor and warn the ship's floating state and stability in real time during mooring loading and unloading

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