Suction anchor uplift bearing capacity dynamically testing device and method

Abstract

The invention discloses a suction anchor uplift bearing capacity dynamically testing device and method. The suction anchor uplift bearing capacity dynamically testing device comprises a model case, asuction anchor, a guide plate, arc guide rails, stand columns, a displacement tuning device and a horizontal limiting device; the side wall of the suction anchor is provided with a vertical sliding rail, and the suction anchor is embedded into the cylindrical model case; the top edge of the model case is provided with the four stand columns arranged in a semi-arc mode at equal intervals; the guideplate is composed of a vertical plate and a top-end radial triangular support and sleeves the upper arc guide rail, the middle arc guide rail and the lower arc guide rail so as to move around the circumference of the wall of the model case; the guide plate is provided with a sliding rail in full length, the top end of the guide plate is connected with the horizontal limiting device; the displacement tuning device is arranged in a clamped mode on the suction anchor and the sliding rail of the guide plate, which are connected through an anchor chain, and the anchor chain is guided out of the model case through pulleys. The suction anchor uplift bearing capacity dynamically testing device can dynamically test the uplift bearing capacity of the suction anchor at any vertical anchor point andat any spatial angle to provide a test method for determining optimal mooring point depth and load bearing direction, thereby being in applicability.

Description

technical field [0001] The invention relates to a test device and method for dynamically testing the pull-out bearing capacity of a suction anchor, belonging to the technical field of marine geotechnical engineering. Background technique [0002] As my country's oil and gas exploration gradually enters deep water areas, suction anchor foundations are widely used for mooring and anchoring of floating drilling platforms and offshore wind turbine towers. In the marine environment, on the one hand, the suction anchor bears the tension load caused by the buoyancy of the upper structure, and on the other hand, it bears the effects of wind, wave, current and other cyclic loads. The stability and failure mechanism of suction anchor foundation are the key issues in the design of its working state, which directly affects the overall safety of offshore floating structures. Since the pull-out load transmitted by the anchor chain (mooring cable) can be decomposed into vertical and horiz...

AI Technical Summary

Problems solved by technology

However, this numerical simulation method only analyzes the ultimate bearing capacity in a single state, and does not discuss the optimal mooring point and optimal loading angle, and the accuracy of the results is easily affected by boundary conditions, material properties, and discrete forms of the structure

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