Method for analyzing shallow water shaking upsetting moment in ship reception chamber of winch type ship lift

Abstract

The invention provides a method for analyzing shallow water shaking upsetting moment in a ship reception chamber of a winch type ship lift, and belongs to the technical field of data statistics. The method includes the following steps: collecting parameters of a ship reception chamber of the winch type vertical ship lift and a water area in the chamber, and establishing a longitudinal two-dimensional mechanical analysis model of the ship reception chamber; assuming that a water body in the ship reception chamber is an ideal fluid which is incompressible, free of rotation and small in free liquid level displacement, and establishing a Laplace equation and boundary conditions which meet working conditions according to the influence of trim motion on the ship reception chamber in the normal operation process; solving an absolute speed potential by using a multi-mode theory and combining a variable separation method; solving hydrodynamic pressure according to an Euler equation; solving the unit width upsetting moment acting on the center of the ship reception chamber bottom plate through integration; calculating and analyzing the convergence of the upsetting moment, and carrying out engineering simplification on the premise that the calculation precision is guaranteed; and finally carrying out programmed solution. The reliability and feasibility of the longitudinal anti-overturning treatment scheme design of the ship reception chamber of the winch type ship lift can be improved.

Description

technical field [0001] The invention belongs to the technical field of data statistics, and relates to an analysis method for the overturning moment of shallow water sloshing in a ship-bearing compartment of a winch type ship lift. Background technique [0002] For the winch type vertical ship lift, during the normal lifting operation of the ship bearing compartment, due to the existence of influencing factors such as the roundness of the drum, the diameter of the steel wire rope, and the manufacturing error of the elastic modulus of the steel wire rope in the main hoisting mechanical transmission system, the suspension It is inevitable that the water-carrying tank will produce trim motion. Under the influence of the pitching motion of the ship-bearing box, the shallow water shaking of the large mass in the box may generate a huge overturning moment, which affects the motion stability of the ship-bearing box. The currently used Housner theory ignores the dynamic characteris...

AI Technical Summary

Problems solved by technology

Under the influence of the pitching motion of the ship-bearing box, the shallow water shaking of the large mass in the box may generate a huge overturning moment, which affects the motion stability of the ship-bearing box

The currently used Housner theory ignores the dynamic characteristics of the water body, and the calculation accuracy is low. There is an urgent need for a targeted theoretical method to analyze the shallow water slosh in the ship under the pitching motion of the ship in the design stage, and calculate the overturning moment generated, which is the longitudinal resistance. The overturning design provides a reliable basis to ensure the safety of operation

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