Active control system for vibration of deepwater drilling riser system
An active control system, deepwater drilling technology, applied in the direction of mechanical oscillation control, non-electric variable control, control/regulation system, etc., can solve the problem of no active control scheme of deepwater drilling riser system, etc., to improve monitoring and active control efficiency Effect
Active Publication Date: 2017-06-30
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology
At present, the fatigue accumulation failure caused by the long-term vibration of the riser system is prevented through the monitoring and maintenance of the riser system, and the instantaneous fracture failure caused by the vibration of the riser system in harsh environments is prevented by recycling the riser system to the drilling platform, that is, it is mainly prevented by passive treatment measures. The riser system fails, and there is no active control scheme for the vibration of the deepwater drilling riser system
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[0015] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0016] Such as figure 1 As shown, in order to design the vibration sensor and actuator position of the deepwater drilling riser system, a dynamic analysis model of the deepwater drilling riser system is established, which can be expressed as:
[0017]
[0018] where [M], [C] and [K] are mass matrix, damping matrix and stiffness matrix respectively, {ü}, and {u} are the acceleration, velocity and displacement vectors of the riser system, respectively, and {F} is the marine environment load vector on the riser system.
[0019] Regardless of the influence of marine environmental loads, that is, the marine environmental load vector {F} on the riser system is zero, the modal analysis is carried out through the dynamic model of the deepwater drilling riser system to determine the transverse and longitudinal modes of the deepwater drilling riser system M...
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The invention relates to an active control system for vibration of a deepwater drilling riser system. The system is characterized in that the system comprises a sensor, actuators, a signal processing module and a control module; the sensor is utilized for monitoring vibration information of the deepwater drilling riser system; then a vibration response spectrum of the riser system is determined through the signal processing module, thereby identifying a vibration excited mode of the deepwater drilling riser system; and furthermore vibration response and load reconstruction of the riser system are finished based on a mode superposition method; a required control load of the riser system is determined; the control load is converted to voltage required by a piezoelectric actuator through the control module, and the control voltage is input into the piezoelectric actuator; and through a positive symmetrical actuator and a negative symmetrical actuator, active control for transverse vibration and longitudinal vibration of the deepwater drilling riser system can be realized, thereby preventing a series of problems caused by vibration of the riser system and realizing a purpose of preventing failure of the deepwater drilling riser system.
Description
technical field [0001] The invention relates to an active control system for vibration of a deepwater drilling riser system, which belongs to the field of active control of marine structure vibration. Background technique [0002] The deepwater drilling riser system is an important part connecting the subsea wellhead and the drilling platform. Its length is generally between 500m and 3000m. It is a typical large deformation nonlinear dynamic sensitive flexible body. Phenomena such as vibration and vortex-induced vibration can easily lead to accidents such as fatigue failure and suspension fracture of the riser, which are important but weak links in the offshore drilling system. At present, the fatigue accumulation failure caused by the long-term vibration of the riser system is prevented through the monitoring and maintenance of the riser system, and the instantaneous fracture failure caused by the vibration of the riser system in harsh environments is prevented by recycling...
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IPC IPC(8): G05D19/02
CPCG05D19/02
Inventor 刘秀全聂振宇陈国明刘福来畅元江傅景杰郑健
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)