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Vortex-parametric coupled vibration test device for marine riser with uniform inclination angle

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

Active Publication Date: 2018-01-16
TIANJIN UNIV
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  • 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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  • Vortex-parametric coupled vibration test device for marine riser with uniform inclination angle
  • Vortex-parametric coupled vibration test device for marine riser with uniform inclination angle
  • Vortex-parametric coupled vibration test device for marine riser with uniform inclination angle

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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] Such as 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 ...

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Abstract

The invention discloses a vortex-parametric coupled vibration test device for a marine riser with a uniform inclination angle, including a model of a marine riser, a support frame for a transverse test, an axial force reciprocating device, a trailer, a strain acquisition instrument and a computer. One end of the pipe model is provided with a first end support device, and the other end of the marine riser model is provided with a second end support device. The tops of the first and second end support devices are respectively connected to the two ends of the transverse test support frame. The horizontal test support frame is fixed on the bottom of the trailer; the second cylindrical joint of the marine riser model is connected with a steel wire rope which is sequentially connected to the tension tensioner, tension spring and tension sensor, and then wound into the lower and upper pulleys in the axial force reciprocating device in turn. , and finally connected to the slider in the axial force reciprocating device; the tension reaches the average tension value by adjusting the tension tensioner, and the frequency of the motor supply voltage is adjusted through the frequency converter, so that the motor reaches the speed required by the working condition to meet the shaft The frequency requirement of force change.

Description

technical field [0001] The invention relates to a test device in the technical field of marine engineering, in particular to a vortex-parametric coupled vibration test device for an ocean riser with a 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 in parame...

Claims

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Application Information

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