隔水管张紧装置抗反冲控制算法适应性研究

为进一步验证隔水管张紧器在紧急脱离时抗反冲控制的适应性,建立了隔水管系统抗反冲控制仿真模型,采用AMESim平台分别进行了位置和速度两种抗反冲控制算法的建模,针对不同海况、钻井液密度及脱离时间等工况的模型输入参数,研究了两种算法的适应性。研究结果表明:利用张紧装置进行隔水管紧急脱离的抗反冲控制是一种切实有效的途径;张紧装置适配船型的最大紧急脱离海况为7级;速度控制算法适用于钻井液密度较低的情况,而位置控制算法适应性更广;紧急脱离时间宜选在船体处于升沉最高点到向中位下降的区间,且选用位置控制算法,可使紧急脱离时安全性能更高。研究结果可为隔水管张紧装置设计及性能优化提供理论依据。

Research on Adaptability of Anti-Recoil Control Algorithm of Riser Tensioner

To further verify the adaptability of the anti-recoil control of the riser tensioner during emergency disconnect sequence in offshore drilling,a simulation model of the anti-recoil control of the riser system was established.The models position and velocity of the anti-recoil control algorithmic were separately established using the AMESim platform.The adaptability of the two algorithms was studied with the input parameters of different sea conditions,mud density,and time of disconnect.The study results show that the use of the tensioning device for the anti-recoil control of the emergency disconnect of the riser is a practical and effective way.The maximum emergency disconnect sea condition of the tensioning device to adapt to the ship is level 7.The speed control algorithm is suitable for low mud density operations.The position control algorithm adaptability is wider.In the case of emergency disconnect time,the time interval between the highest point of the hull and the descent to the middle position should be selected,and the position control algorithm be used to improve the safety performance during emergency disconnect.The study results can provide theoretical basis for the design,performance optimization and application of riser tensioner.