A verification method for crane heave compensation function

Abstract

The invention relates to the field of ship crane debugging, in particular to a crane wave compensation function verifying method. A measuring rope with a light emitting mark is used for conducting testing, the light emitting mark is red and white paint, a floating ball is arranged at the upper end of the measuring rope, and a balance weight block is arranged at the lower end of the measuring rope.The measuring rope penetrates concentric circular holes of two steel plates on a load bearing bracket tool frame, and the test is conducted two times. In the first-time test, the wave compensation function is stopped, an underwater robot is used for observing the displacement of the steel plates of the load bearing bracket tool frame on the light emitting mark, and the displacement is recorded asL1. In the second-time test, the wave compensation function is started, the underwater robot is used for observing the displacement of the steel plates of the load bearing bracket tool frame on the light emitting mark, and the displacement is recorded as L2. Through the analysis of the data L1 and L2 and the difference value, verification of the crane wave compensation function is achieved. The testing method is simple and efficient, the testing efficiency can be improved, and the trial trip period is shortened.

Description

technical field [0001] The invention relates to the field of ship crane debugging, in particular to a method for verifying the wave compensation function of a crane. Background technique [0002] Due to the slowdown of the global economy, resources have become an important guarantee for the economic development of various countries. Marine resources are abundant. High-performance marine engineering ships have become an important tool for exploiting marine resources. Cranes are indispensable equipment on marine engineering ships. For offshore hoisting operations, offshore replenishment, etc., in a complex marine environment, the ship will be affected by sea wind, waves and its own navigation, and there will be relative motions of heave, roll and pitch between the two ships, and the process of replenishment at sea It is very easy for the cargo to collide with the deck, and it may also be suspended again due to the sinking of the replenishment ship, resulting in damage to the c...

AI Technical Summary

Problems solved by technology

[0002] Due to the slowdown of the global economy, resources have become an important guarantee for the economic development of various countries. Marine resources are abundant. High-performance marine engineering ships have become an important tool for exploiting marine resources. Cranes are indispensable equipment on marine engineering ships. For offshore hoisting operations, offshore replenishment, etc., in a complex marine environment, the ship will be affected by sea wind, waves and its own navigation, and there will be relative motion between the two ships, such as heave, roll and pitch, and the process of replenishment at sea It is very easy to cause cargo to collide with the deck, and it may also appear to be suspended again due to the sinking of the supply ship, resulting in damage to the cargo. In severe cases, a catastrophic accident of ship sinking will occur, which seriously threatens the safety of maritime supply operations.

Conventional cranes do not have this protective function and cannot meet the requirements of safe, on-time and efficient operations for offshore replenishment

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