Method for measuring continuously-variable load precision of large-scale floating dock in floating state

Abstract

The invention relates to the technical field of engineering ships, in particular to a method for measuring continuously-variable load precision of a large-scale floating dock in a floating state. The deck plane of the floating dock and the deck plane of a ship body are measured respectively by two electronic total stations (total stations for short), deformation data generated by the two electronic total stations in the ship body dragging process are fed back to a central control room at the same time based on a uniform reference, and the central control room is guided to perform water compressing adjustment or water discharging adjustment on the ballast tank of the floating dock. The method has the advantages that: the dynamic deformation of the floating dock and the ship body in the ship dragging process are instantly and statically fed back, and the instant deformation states of the floating dock and the ship are effectively measured, so that the central control room of the floating dock is guided to adjust the water compression in each ballast tank, the deformation precision and the launching safety of the ship body in the dragging process are ensured, a great number of working hours are saved, and the launching dragging efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of engineering ships, in particular to a method for measuring the precision of continuous variable load in a floating state of a large floating dock. Background technique [0002] After the large-scale ships are repaired and built on the berth of the shipyard, the known launching method is to use the floating dock to launch, that is, to use tools such as cranes to move the ship from the berth along the paved slideway to the slideway in the floating dock. The dock is a huge concave-shaped cabin with walls on both sides and open front and rear ends. It is a trough-shaped flat-bottomed boat with a special structure. The dock bottom and the dock walls on both sides are box-shaped structures, which are divided into several closed ballast tanks longitudinally and horizontally, which are used to press water and drain water to make the dock sink and float. The function of the bottom tank is not only to ensure buoya...

AI Technical Summary

Problems solved by technology

In actual operation, the floating dock is located on the undulating sea surface. If the coordinates of the floating dock are manually measured, it will be affected by irregular waves all the time, so that it is impossible to obtain accurate measurement values ​​and cannot reflect dynamically and timely. The working plane accuracy of the floating dock cannot be predicted and adjusted

Therefore, you must be very careful during the pulling process. Every time you pull a small distance, you must measure the coordinates of the floating dock and judge whether there is a slight suspension of the hull. If there is a suspension, you must stop pulling the hull and use the central control. room to adjust the water pressure of each ballast tank to ensure the accuracy and safety of the launching of the hull, which caused the process of pulling the hull to be interrupted many times to wait for the adjustment of the floating dock, which increased the time for pulling and launching the hull. Consume a lot of manpower and material resources

On the other hand, due to the long service life of the floating dock, various types of ships enter and leave the dock in different ways (forward docking and reverse docking), which will cause irreversible permanent deformation to the bottom plane of the floating dock, which will cause the loading instrument in the central control room to react Without the real value, it is impossible to accurately know the real-time status of the floating dock

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