One-dimensional anchoring rope and vertical tube dynamic characteristics test device

Abstract

The invention provides a mooring rope and a riser dynamic characteristic testing device for an ocean structure, belonging to the ocean engineering technical field, comprising a sliding mooring rope and riser testing platform, a shoreside rail-mounted bracket, a replaceable brake bar, an AC servo motor control system, a bottom equidistant anchor point and so on, wherein, the shoreside rail-mounted bracket is fixed on the bank of a water pool; the sliding mooring rope and riser testing platform is arranged in rails of the shore-side rail mounted bracket on the bank; the shoreside rail-mounted bracket and the sliding mooring rope and riser testing platform are horizontally connected through the replaceable brake bar, so that the sliding mooring rope and riser testing platform can be fixed; the AC servo motor control system controls a slide block on the sliding mooring rope and riser testing platform to slide; a mooring rope model or a riser model is hung on the lower end of the slide block of the sliding mooring rope and riser testing platform, and the other end of the mooring rope model or the riser model is fixed on the bottom equidistant anchor point. The device overcomes the defects of difficulty of changing wide horizontal spans, poor control accuracy, difficult operation and so on.

Description

technical field [0001] The invention relates to a device in the field of marine engineering, in particular to a one-dimensional mooring cable and riser dynamic characteristic test device. Background technique [0002] Actual engineering experience proves that the mooring system is very important to the motion response of marine structures, and how to accurately predict the motion response of the mooring system has become a major topic in the field of ocean engineering today. When conducting model tests on deepwater platforms or FPSOs, correctly simulating their mooring lines and riser devices plays a vital role in the accuracy of the tests. Ideally, the physical characteristics of the mooring lines and risers in the model tests need to be all realistic. Under current circumstances, checking whether the mooring line model or the riser model meets the requirements mainly depends on the top tension-displacement characteristics of the model, that is, whether the static displace...

AI Technical Summary

Problems solved by technology

The test has the following disadvantages: (1) The movement between the motor spindle and the worktable is transmitted through the intermediate link such as the screw. It is easy to produce elastic deformation, friction, backlash, etc., which will cause the lag of feed movement and many other nonlinear errors, which will affect the rapid response to motion commands

At the same time, the lead screw is a slender rod, which will be deformed under the action of force and heat, which will affect the processing accuracy.

(2) It is necessary to manually move the test platform to change the large horizontal span, which is time-consuming and laborious; (3) The mooring cable and riser test platform are placed in the water tank as a whole, the height is limited, and the water depth is difficult to control; (4) The accuracy of the DC servo motor Lower, can not precisely control the slider movement; in further searches, no documents identical or similar to the subject of the present invention are found

Images