Page 243 - 《振动工程学报》2026年第5期

第 39 卷第 5 期 振 动 工 程 学 报 Vol. 39 No. 5
2026 年 5 月 Journal of Vibration Engineering May 2026

外 流 与 段 塞 内 流 联 合 作 用 下 弹 性 管 流 致 振 动

特 性 研 究

麦耘翔， 陈正寿

（浙江海洋大学石油化工与环境学院，浙江 舟山 316022）

摘要：在海洋工程流-固耦合研究领域，内、外流耦合作用下弹性管流致振动现象备受关注。本文采用双向流-固耦合方法，开
展了均匀外流与段塞内流共同作用下弹性管振动特性的数值研究。基于均方根振幅包络图对显性模态的分析发现，随着内
流中气液比的增加，弹性管的振动强度更易增强；内流力对管道总体动力学响应的贡献度呈现递减趋势，但沿管轴的振动模
态基本保持不变。通过对弹性管内/外流体力的瞬时比值及其时均值和方差的定量分析，发现沿管轴中段内/外流体力的瞬时
力比值均达到其局部极值。对内流力变化进行时频希尔伯特谱分析发现，内流力长周期“群性”特征随气体体积分数增加，由
难以识别演变为清晰可见；多模态竞争、共存和流-固耦合作用下的能谱密度变化，更易引起横流向和顺流向流体力权重呈间
歇性波动。相关研究可为气液两相流条件下海洋弹性管设计、振动控制及疲劳分析等提供一定的参考。
关键词： 流致振动；内流；流-固耦合；段塞流；弹性管
中图分类号：TV131.2；P756.2 文献标志码：A DOI：10.16385/j.cnki.issn.1004-4523.202503007

Flow-induced vibration characteristics of a flexible pipe under the combined effect
of external flow and slug internal flow

MAI Yunxiang，CHEN Zhengshou
（School of Petrochemical and Environment，Zhejiang Ocean University，Zhoushan 316022，China）

Abstract：In the field of fluid-structure coupling in ocean engineering, the flow-induced vibration of flexible pipes under the coupled effect of
internal flow and external flow has attracted considerable attention. A bidirectional fluid-structure interaction method was adopted to
numerically investigate the vibration characteristics of the flexible pipe subject to uniform external flow and slug internal flow. Based on the
analysis of the apparent vibration modes using the root-mean-square amplitude envelope, it is found that the increasing the gas/liquid ratio of the
internal flow significantly enhances the vibration intensity of the flexible pipe. The contribution of the internal flow forces to the overall
dynamic response of the pipe decreases, but the apparent vibration modes along the pipe axis remain essentially unchanged. Through the
quantitative analysis of the instantaneous force ratio of internal flow to external flow, as well as its mean and variance values, one can found that
the instantaneous force ratio reaches it local maxima in the middle section of the pipe. Furthermore，the time-frequency Hilbert spectra reveals
that the long-period ‘grouping’ profile associated with the internal flow forces changes from indistinct to clearly visible when the gas volume
fraction increases. The changes in power spectral density under the combined effects of multi-mode competition, multi-mode coexistence and
fluid-structure coupling are more likely to cause intermittent fluctuations in the hydrodynamic force weight of both cross flow and in-line flow
directions. The relevant results provide certain reference values to the design, vibration control and fatigue analysis of flexible marine pipelines
subject to internal two-phase gas-liquid flows.
Keywords：fluid-induced vibration；internal flow；fluid-structure coupling；slug flow；flexible pipe

海洋立管作为石油与天然气传输设施之一，在 容易引发复杂的流致振动响应 ，进而使得油气开采
[2]
油气开采及其他工业领域中发挥着至关重要的作用 。 系统的安全性和可靠性遭受威胁。
[1]
海洋油气开采中通常采用气液混输的方式经由立管 关于弹性管内单相输流的流致振动问题，国内
输运海底油气资源，相较于单相内流，气液混输流常 外学术界已开展了诸多探索与实践。欧阳飞等 [3] 建
表现出更为复杂的流动特性，在较强外流作用下，更 立了计及内流作用的弹性管涡激振动时域预报方

收稿日期：2025-03-03；修订日期：2025-08-05
基金项目：国家自然科学基金资助项目（41776105）；浙江省自然科学基金资助项目（LY20E090003）