Riser motion response simulation device based on combination of floating structure wave frequency and slow drifting

Abstract

The invention discloses a riser motion response simulation device based on combination of floating structure wave frequency and slow drift. The riser motion response simulation device comprises a movable water tank, a top excitation loading device, a test sample tube and a data acquisition system. The movable water tank comprises a stainless steel plate, a tempered glass plate and the like; the top end excitation loading device is composed of an H-shaped steel stand column, a T-shaped side plate and a hydraulic servo double-frequency excitation loading device and arranged on the right side ofthe movable water tank. The test sample tube comprises a silicone tube and cylindrical syntactic foam, the top end is connected with the top end excitation loading device, and the tail end is connected with the inner wall of the movable water tank. According to the test device, the transmission process and motion characteristics of double-frequency excitation response generated by the floating structure along the slow wave type flexible vertical pipe under the action of wind wave flow are studied, so that a system acquired data analysis result obtained through an indoor model test can providea reference basis for configuration design and theoretical analysis of the deepwater flexible vertical pipe.

Description

technical field [0001] The invention relates to the field of motion response simulation devices for flexible risers, in particular to a motion response simulation device for multiple slow-wave flexible risers under the combined motion of wave frequency and slow drift of floating structures under deep-water operating conditions, which can be used to simulate wind, wave and current The transmission process and motion response characteristics of the dual-frequency excitation response generated by the floating structure along the slow-wave flexible riser are studied to study the influence of the slow-wave riser arrangement on the dynamic response of the deepwater riser and the movement The decoupling mechanism. Background technique [0002] As a better solution for oil and gas transportation, steel catenary risers have been widely used in deepwater oil and gas development. However, as the operating water depth continues to increase and the environmental conditions become more s...

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Problems solved by technology

[0005] The purpose of the present invention is to address the deficiencies in the prior art, and propose a multi-slow-wave type flexible riser motion response simulation device under the combined motion of the floating structure wave frequency and slow drift, which solves the problem of the first-order wave of the floating structure during the test. The simulation problem of frequency and second-order slow-drift coupled motion can simulate the transmission law and motion characteristics of the top excitation along the slow-wave flexible riser under the combined motion of wave-frequency and slow-drift of the floating structure, and measure different slow-wave arrangements The response characteristics and dynamic amplification coefficient of the flexible riser motion under the action of the configuration, collate the relevant test data and determine the displacement and acceleration of the multiple slow-wave flexible riser and the change of soil pressure under the combined motion of the wave frequency and slow drift of the floating structure Provide effective test data support and reference basis for the optimal design and theoretical analysis of the motion response configuration of slow-wave flexible risers under the combined motion of wave frequency and slow drift of floating structures

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