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Riser vortex induced vibration monitoring method based on stochastic resonance

A stochastic resonance and vortex-induced vibration technology, which is used in measuring devices, measuring ultrasonic/sonic/infrasonic waves, instruments, etc., to solve the problems of inability to detect and weaken vibration signals, and to reduce data transmission time, improve life cycle, and save energy. effect of life

Inactive Publication Date: 2017-10-13
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

In the background of strong noise, the vortex-induced vibration frequency signal of the riser is completely submerged in the noise and cannot be detected
At this stage, linear filtering is often used to suppress noise, but when the noise frequency is close to the vibration frequency, linear filtering will also weaken the vibration signal

Method used

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  • Riser vortex induced vibration monitoring method based on stochastic resonance
  • Riser vortex induced vibration monitoring method based on stochastic resonance
  • Riser vortex induced vibration monitoring method based on stochastic resonance

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.

[0019] A vortex-induced vibration monitoring method for risers based on stochastic resonance provided by the present invention includes the following contents: 1) setting a vortex-induced vibration monitoring system for risers including a riser vibration frequency detection system, an underwater acoustic signal receiving device and a monitoring center ;The riser vibration detection system includes sensors, stochastic resonance signal processing systems, processors, power amplifiers, underwater acoustic emission transducers and power supplies; the data receiving and display platform includes underwater acoustic receiving transducers, A / D converters, amplifiers , demodulator and decoder; the connection method is as attached figure 1 , there is no special connection method for...

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Abstract

The invention provides a riser vortex induced vibration monitoring method based on stochastic resonance. A monitoring system is arranged on the riser, and the vibration signals of the riser are acquired. Through a nonlinear signal processing unit-stochastic resonance system, signal processing is firstly carried out; then, through spectrum analysis, the riser vortex induced vibration frequency is obtained; and further, whether vortex induced vibration happens is judged. The riser vortex induced vibration frequency is detected from a complex ocean noise background, and the monitoring performance of the monitoring system is improved.

Description

technical field [0001] The invention relates to the fields of marine engineering and deep-water petroleum, in particular to a monitoring method for vortex-induced vibration of deep-water risers suitable for long-term service. Background technique [0002] In the field of offshore oil, the riser is the throat connecting the subsea wellhead and the offshore operation platform. It is an important weapon for deep-water oil and gas exploration and development, and it is also the most demanding and challenging part of deep-water oil and gas development technology. At present, offshore oil and gas drilling is advancing to 3000m or even deeper waters. Compared with shallow water, the deep sea environment is more harsh. In recent years, a series of riser fatigue failure accidents have occurred in many areas, which not only reflects the high risk of deepwater oil and gas exploration and development, but also fully demonstrates the necessity and importance of riser fatigue monitoring....

Claims

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Application Information

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IPC IPC(8): G01H17/00
CPCG01H17/00
Inventor 王海燕董海涛周建良许亮斌申晓红盛磊祥马石磊黄中明锁健
Owner NORTHWESTERN POLYTECHNICAL UNIV
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