基于振动响应分析的海底管道悬空内检测研究

Study on submarine pipeline suspension internal detection based on vibration response analysis

铺设于海床中的海底管道常因洋流冲刷、船舶锚拽等自然或人为因素而处于悬空状态,易造成管道变形、腐蚀、损伤和开裂泄漏等问题,严重影响管线安全。针对DN200海底管道的悬空内检测,设计了一种内检测机器人并对其进行了动力学分析。同时,联合ANSYS与ADAMS软件建立了柔性管道-土耦合模型,开展了悬空管道内检测仿真分析。采用快速傅里叶变换和短时傅里叶变换方法对内检测机器人在复杂激励耦合条件下的振动响应信号进行处理,通过分析机器人的振动加速度实现了对悬空管段的有效识别。研究结果为油气管道悬空内检测提供了新思路。

Submarine pipelines laid in the seabed are often suspended due to natural or man-made factors such as ocean current erosion and ship anchoring,which can easily cause pipeline deformation,corrosion,damage,cracking and leakage,seriously affecting the safety of pipelines.Aiming at the suspension internal detection for DN200 submarine pipelines,an internal detection robot was designed,and its dynamics analysis was conducted.Meanwhile,a flexible pipeline-soil coupling model was established by combining ANSYS and ADAMS software,and the internal detection simulation analysis for suspended pipelines was carried out.The fast Fourier transform and the short-time Fourier transform were used to process the vibration response signal of the internal detection robot under complex excitation coupling conditions,and the effective identification of the suspended pipeline section was realized by analyzing the vibration acceleration of the robot.The research results provide a new idea for the internal detection of oil and gas pipelines in suspension.