Jacket platform rod stress measurement sensor system and method

Abstract

The invention provides a jacket platform rod stress measurement sensor system which comprises multiple strain sensors arranged on the same circumference at intervals and a sensor connecting base. The invention further provides a corresponding measurement method. The sensors are combined for use, measured stress values of the surface of a rod are calculated to be the average stress and strain borne by the rod actually. The average value of the whole stress and strain of the rod can be accurately acquired, operation is simple, the system is suitable for complex work conditions and working underwater for a long time under the complex sea condition, the sensors can be conveniently located and installed on the base and can be protected so as to be suitable for working under the sea surface for a long time, the sensors are high-accuracy optical fiber sensors, and signals are convenient to collect and process.

Description

technical field [0001] The invention relates to a device in the technical field of marine engineering, in particular to a method for measuring strain and stress arranged on underwater rods of a jacket platform and a corresponding installation device, which can more accurately monitor the stress of the rods. Background technique [0002] During the underwater inspection of the CNOOC Bohai BZ25-1WHPB platform, it was found that there was a crack in the weld of the rod at -18m. According to the inspection report, there are currently 6 cracks in the horizontal brace and the conduit leg on the mud surface or have fallen off. [0003] Therefore, real-time online and accurate assessment of the health status of the jacket platform, real-time monitoring of the safety and integrity of the structure, and early positioning and repair of damaged rods can reduce the incidence of offshore oil and gas accidents. small economic loss. However, relying on manual detection or ROV detection, ul...

AI Technical Summary

Problems solved by technology

The present invention aims to solve the problem that the existing stress and strain measuring instruments can only measure the stress on the surface of the bar, and it is difficult to obtain the force and deformation of the whole bar truly and accurately. It is hoped that it will be convenient and effective through reasonable design. Underwater installation and operation; accurate and timely acquisition of stress and strain values ​​at monitoring points, and continuous monitoring of the safety status of the platform in combination with safety software

Images