Safety calculation method and calculation device for a double-hook hoisting system

Abstract

The invention discloses a security calculation method of a double-hook hoisting system. The calculation method comprises the following steps of finite element modeling, application of displacement constraints, setting of parameter values and convergence criteria, initial bearing reaction force calculation and initial convergence judgment, namely judging initial bearing reaction force, when the bearing reaction force meets the convergence criteria, obtaining a finite element model in a convergence stable state, or else, carrying out iterative calculation on various displacement constraints until the bearing reaction force corresponding to the displacement constraints meets the convergence criteria. The invention further discloses a security calculation device of the double-hook hoisting system by using the calculation method. According to the calculation method and the calculation device disclosed by the invention, the final convergence stable states of a hoisting object, hooks and a hoisting rope can be calculated, a stable security distance and a specified position of the double-hook hoisting system, a minimum distance of the hoisting rope, a sloping state of the hoisting object, position postures of the hooks, a load of the hoisting rope and the loads of the hooks are calculated according to the final convergence stable states, and accurate formulation of a hoisting technology can be guided, thereby reducing the cooperative hoisting risk of the double hooks.

Description

technical field [0001] The invention relates to the field of safety calculation of a hoisting system for hoisting objects, in particular to a safety calculation method and a calculation device for a double-hook hoisting system. Background technique [0002] With the enlargement of heavy-duty hoisting objects, the tonnage of hoisting objects is getting larger and larger, and hoisting with a single crane often cannot meet the operation requirements. In order to ensure the safety and stability of the hoisting process, double-machine or multi-machine collaborative operations are increasing. In the common double-machine hoisting operation, the load deformation of the hoisting rope and the rotation of the hook can all have an adverse effect on the safety of the hoisting system. [0003] There are some technical inventions for hoisting large-scale hoisting objects. For example, the patent document with the application number CN201410713436.5 provides a crane hoisting action planni...

AI Technical Summary

Problems solved by technology

[0009] (1) The elastic deformation of the hoisting system is not considered;

[0010] (2) The rotation of the hoisting system under the action of gravity, especially the rotation effect of the hook, is not considered;

[0011] (3) The calculation of safety indicators of the hoisting system is not involved, such as the calculation of the stable safety distance of the hoisting system, interference inspection, etc.

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