基于柔性管缆运动监测数据的位移计算方法  

Displacement Calculation Method Based on Flexible Pipe and Cable Motion Monitoring Data

作　　者：赵晨宇 罗晓兰[1] 张涛[1] 刘军鹏 ZHAO Chenyu;LUO Xiaolan;ZHANG Tao;LIU Junpeng(College of Mechanical and Transportation Engineering, China University of Petroleum, Beijing 102249, China)

机构地区：[1]中国石油大学(北京)机械与储运工程学院,北京102249

出　　处：《石油矿场机械》2022年第1期29-36,共8页Oil Field Equipment

基　　金：国家重点研发计划项目“深海结构物监测集成技术研究”(2018YFC0310540)。

摘　　要：为了得到柔性管缆的弯曲应力和疲劳损伤累积应力计算所需的位移数据,通过实时监测获得的柔性管缆的加速度数据,应用四元数法和4阶Runge-Kutta(龙格库塔)法对其瞬时运动姿态角进行更新求解。然后,剔除监测加速度数据中的重力加速度分量,应用FFT(离散傅立叶变换的快速算法)频域法,推导出柔性管缆3个方向位移的计算公式,并运用MATLAB计算其位移值。为柔性管缆的弯曲强度和疲劳强度计算提供理论依据。Aiming at the displacement parameters required for the calculation of bending stress and fatigue damage cumulative stress of flexible pipe and cable,the acceleration motion data of flexible pipe and cable obtained through real-time monitoring were updated and solved by quaternion method and fourth-order Runge Kutta method,and the gravity acceleration component in the monitored acceleration was eliminated.By using the FFT(fast algorithm of discrete Fourier transform)frequency domain,the calculation formula of displacement in three directions of flexible pipe and cable was derived,and the displacement value was calculated by MATLAB.It provides a theoretical basis for the calculation of bending strength and fatigue strength of flexible pipe and cable.

关 键 词：柔性管缆 监测数据 位移 四元数法 FFT 

分 类 号：TE952[石油与天然气工程—石油机械设备]