An active control mooring test device in air

Abstract

The invention provides a device for testing active control mooring in the air, which comprises two brackets used for connecting a top point and a bottom point of each mooring line, six hydraulic cylinders used for controlling the top points and the bottom points to move, a data acquisition system and a servo control computer. According to the invention, three-dimensional movements are simultaneously applied to the top points of an intercepted water depth mooring line model and a full water depth mooring line model, a PID control system processes measurement information at an interception point and numerical simulation information of the intercepted mooring line, and closed-loop control of measurement, feedback and control is achieved for the interception point. The device provided by the invention can carry out a hybrid model test on an active mooring system quickly and accurately in the air, and performs comparison with the full water depth mooring line model at the same time, thereby determining reliable equipment and control parameters, and laying a good foundation for performing model tests on a marine engineering pool subsequently.

Description

technical field [0001] The invention relates to an active control mooring test device in the air, which belongs to the technical field of ocean engineering model tests. Background technique [0002] Ocean engineering model test is one of the important means to test the accuracy and reliability of platform system design and theoretical analysis results. However, with the development and production of offshore oil and gas to deeper and deeper waters, the size of existing ocean engineering pools is limited. For deep-water platform mooring systems, it is impossible to control the entire platform and its moorings within a reasonable scale ratio. The system is model tested. At present, the commonly used method is to carry out equivalent truncation design on the mooring line, and then carry out the passive mixed model test of tank test, numerical reconstruction and numerical extrapolation. But how to carry out the equivalent truncation design of the mooring line, and accurately s...

AI Technical Summary

Problems solved by technology

But there are the following deficiencies: (1) The mooring line at the truncated point is connected to the slider, and the slider only moves in translation, not in vertical motion

However, whether the numerical simulation analysis method is appropriate and whether the hydrodynamic parameters are set reasonably will directly affect the reliability and accuracy of the test results.

(3) There is no tension sensor and displacement sensor installed at the model at the lower end of the mooring line, that is, the movement and stress of the lower end model of the mooring line cannot be obtained in real time, nor can it be combined with numerical simulation calculations for real-time data feedback and control

This is an indirect control method, which cannot really realize the active control of the model at the lower end of the mooring line, and it is difficult to guarantee the accuracy of the test results

(4) Actively control multiple mooring lines underwater at the same time, install watertight facilities, and the cost of the entire test device is extremely high

Moreover, the system that controls multiple mooring lines at the same time needs to debug various parameters at the same time to ensure the smooth progress of the test, and the entire test cycle is very long

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