河底管道悬空段状态矩阵分析  

State Matrix Analysis for Free Spanning Length of River Bottom Pipeline

作　　者：肖芳淳[1] 

机构地区：[1]西南石油学院

出　　处：《石油规划设计》2001年第3期16-20,共5页Petroleum Planning & Engineering

摘　　要：在河底管道的设计及运营过程中，应严格控制管道的悬空段长度，使之小于管道的 极限冲刷长度，以避免管道因涡流作用发生剧烈振动，确保管道安全。介绍一种新方法—— 状态矩阵分析，该法将悬空管段两端的管道处理成Winkle弹性地基上的半无限长梁，然后考 虑入土段和悬空段在边界处的变形协调条件，以确定管道横向振动的自振频率，最后利用自 振频率与涡流激振频率相等时的共振条件确定管道极限冲刷长度。During the engineering and operation of river bottom pipeline one must strict limit the free spanning length in the scope of maximum erosion to avoid t he intensive vibration of pipeline caused by the vortex flow, and to ensure pipe line safety. Introduced a new method of State matrix analysis for free spanning length of river bottom pipeline. According to this method the pipeline in the tw o ends of the free spanning are considered as infinite semi-beams on Winkle elas tic foundation, and then considered the deformation condition at the boundary be tween the buried part in soil and the free spanning part pipeline to determine t he inherent frequency of transverse vibration of the pipeline. Finally using the resonance condition, when the inherent frequency equals the vortex induced freq uency, calculated the maximum length of erosion.

关 键 词：水下管道 长度 状态方程 数学分析 油气管道 河底管道 悬空段 矩阵 

分 类 号：TE973.1[石油与天然气工程—石油机械设备]