Active mode ocean platform mixing model test device

Abstract

The invention relates to an active offshore platform mixed model testing device; wherein, the offshore platform model is connected with a mooring cable model by a pulling force sensor; the lower end of the mooring cable model is fixedly connected with a sliding block which is arranged on the upper surface of a leading screw; the leading screw is fixedly connected with a servo motor; a water sealing device is arranged outside the servo motor, the leading screw and the sliding block and at the bottom of a water pool; a motion control card is connected with a computer; a non-contact type optical measurement system is connected with a data automatic collecting card and a computer real-time analysis module; the pulling force sensor is arranged between the offshore platform model and the upper end of the mooring cable model; the pulling force sensor is connected with a strain amplifier which is connected with the data automatic collecting card and the computer real-time analysis module. The active offshore platform mixed model testing device improves the precision and reliability of the mixed model tests, and leads the mixed model to be more approximate to the practical mixed model test device in an offshore platform engineering.

Description

technical field [0001] The invention relates to a test device in the technical field of ocean engineering, in particular to an active hybrid model test device for an ocean platform. Background technique [0002] The deep-sea platform system is complex in technology, large in investment, and high in risk. It is very important to correctly obtain its technical performance such as motion, force, and whether the deck is exposed to waves in the harsh ocean environment. These performance parameters are crucial for determining and designing the structure and An important basis for its mooring, riser and other related systems. The marine engineering community still agrees that the results of physical model tests are the most reliable, and use them as the final decision for designing and building offshore platforms. The physical model tests of offshore platforms are all carried out in marine engineering pools that can simulate the marine environment, and the length of mooring lines ...

AI Technical Summary

Problems solved by technology

[0003] After searching the literature of the prior art, it is found that the Chinese patent publication number: CN 200962068Y, patent name: single-column offshore platform vortex-induced motion model test device, a model test device for offshore platforms based on passive truncation technology is proposed in this paper, Use mathematical optimization method to make the tension-horizontal displacement characteristics of each model mooring line consistent with the actual, and the restoring force-horizontal displacement characteristics of the total model mooring system are consistent with the actual, that is, use the equivalent mooring system to equivalent the actual mooring system The static characteristics of the mooring system, its disadvantage is that this passive truncation technology requires various simulated mooring line model segments and many other auxiliary materials, plus some structural numerical calculation software, which will inevitably lead to the The tension of the mooring line of the model - the horizontal displacement characteristic deviates from the actual one, and the restoring force of the total model mooring system - the horizontal displacement characteristic will also have a large error from the actual one

This is actually an indirect model test. The dynamic characteristics of the mooring system cannot be consistent with the real mooring system, and its reliability is not high.

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