Method for determining bearing capacity of in-service offshore platform crane

Abstract

The invention discloses a method for determining the bearing capacity of an in-service offshore platform crane. The main purpose is to determine the bearing capacity of an active crane with a single characteristic. The method is characterized by comprising the following steps that strain sensors are arranged on a suspension arm and an A-shaped frame of an active-service crane, and strain data at different lifting angles are collected through strain testing; establishing a finite element multi-scale model of the overall structure of the crane by utilizing finite element software; calibrating the multi-scale model of the overall structure of the crane by using strain data acquired by the strain test experiment so as to eliminate modeling errors of the finite element multi-scale model of the overall structure of the crane and obtain a finite element multi-scale reference model of the active service ocean platform crane; the finite element multi-scale reference model is used for representing the actual state of the crane in service, the obtained finite element multi-scale reference model is used for conducting a simulation test under the maximum design load of the crane, and the bearing capacity of the crane is obtained through calculation.

Description

Technical field: [0001] The invention relates to a method for determining the bearing capacity of an in-service offshore platform crane. Background technique: [0002] At present, the test of the bearing capacity of the offshore platform crane is based on the lifting angle and load relationship given in the bearing capacity table at the factory, and the crane hook or spreader hangs the water bag of the corresponding weight, and the suspension time is not less than 5min. During the test, the crane shall carry out the slow-speed hoisting, slewing and luffing tests under the test load, and shall also carry out the braking test of the hoisting, slewing and luffing mechanisms, and the corresponding load tests shall be carried out at all angles. If the boom can meet the above test requirements, it means that the crane meets the original factory load requirements. If the boom can not complete the above test, it means that the crane does not meet the original factory load requiremen...

AI Technical Summary

Problems solved by technology

If the boom can meet the above test requirements, it means that the crane meets the original factory load requirements. If the boom cannot complete the above test, it means that the crane does not meet the original factory load requirements, and the crane will be repaired, replaced or scrapped.

During the use of the crane, due to factors such as the marine environment, it is easy to cause corrosion of the rods and damage to the structure, so that the load-carrying capacity of the active cranes often cannot meet the requirements when leaving the factory. Scientific and accurate, and also increased production costs to a certain extent

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