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Inclination angle uniform incoming flow ocean riser vortex-induced-parameter coupled vibration testing device

A test device and a technology of uniform inflow, applied in the field of marine engineering, can solve the problems of inability to realize simultaneous observation, lack of test measurement devices, etc., and achieve the effects of important popularization and application value and scientific significance, low cost, and convenient installation and debugging.

Active Publication Date: 2015-12-30
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main reason is the lack of test and measurement devices, especially the simultaneous observation of the coupling effect of vortex-induced vibration and parametric vibration with uniform inclination angle, and good control of the conditions for the occurrence of vortex-induced vibration and parametric vibration with inclination angle

Method used

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  • Inclination angle uniform incoming flow ocean riser vortex-induced-parameter coupled vibration testing device
  • Inclination angle uniform incoming flow ocean riser vortex-induced-parameter coupled vibration testing device
  • Inclination angle uniform incoming flow ocean riser vortex-induced-parameter coupled vibration testing device

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Embodiment Construction

[0047] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, and the described specific embodiments are only for explaining the present invention, and are not intended to limit the present invention.

[0048] like figure 1 and image 3 As shown, a kind of vortex induced-parametric excitation coupled vibration test device for an ocean riser with a uniform inclination angle proposed by the present invention includes an ocean riser model 1, a transverse test support frame 3, a trailer, an axial force reciprocating device, and a strain acquisition instrument and a computer, one end of the marine riser model 1 is provided with a first end support device, the other end of the marine riser model 1 is provided with a second end support device, the first end support device and the second end support device The tops of the two end support devices are respectively connected to the...

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Abstract

The invention discloses an inclination angle uniform incoming flow ocean riser vortex-induced-parameter coupled vibration testing device. The device comprises an ocean riser model, a transverse test supporting frame, an axial force reciprocating device, a trailer, a strain acquisition instrument and a computer. One end of the ocean riser model is provided with a first end supporting device, the other end of the ocean riser model is provided with a second end supporting device, the top of the first end supporting device and the top of the second end supporting device are connected with the two ends of the transverse test supporting frame respectively, and the transverse test supporting frame is fixed to the bottom of the trailer; a second cylindrical connector of the ocean riser model is connected with a steel wire rope, and the steel wire rope is sequentially connected with a tension tensioner, a tension spring and a tension sensor and finally is connected to a slider in the axial force reciprocating device after being sequentially wound in pulleys on the lower portion and the upper portion of the axial force reciprocating device; by adjusting the tension tensioner, tension is made to reach an average tension value, the frequency of a power supply voltage of a motor is adjusted through a frequency converter, and therefore the motor can achieve the rotation speed required by the work condition and meet the variable frequency requirement of the axial force.

Description

technical field [0001] The invention relates to a test device in the technical field of marine engineering, in particular to a test device for vortex-induced-parametric coupled vibration of a marine riser with uniform inclination angle Background technique [0002] The riser is an essential equipment for deep-water oil and gas exploitation, and the marine environmental load it bears mainly comes from the action of ocean currents. When the sea current passes through the riser structure, alternate vortex shedding will be generated on both sides of the riser, which will induce the phenomenon of vortex induced vibration, which is the main cause of fatigue failure of the riser. [0003] The top of the marine riser is generally connected to the floating platform. The platform heaves with the waves, giving the top of the standpipe a displacement time history response, causing the axial force of the standpipe to change periodically with the movement of the buoyant body, resulting i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M10/00
Inventor 徐万海余杨罗浩冯旭
Owner TIANJIN UNIV
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