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| 1 | 深海细长柔性立管涡激振动数值分析方法研究进展显示文摘深海细长柔性立管的涡激振动与刚性圆柱的涡激振动问题相比,既有联系又有区别.当立管的长细比(L/D)较大时,会展现出一些刚性圆柱涡激振动没有的现象.本文介绍了近几十年来深海开发的细长柔性立管涡激振动的研究进展,主要侧重于数值计算分析研究领域,对目前常用的数值分析方法进行了归纳和总结.在此基础之上,详细介绍了目前理论研究和实际工程中的热点问题,诸如流场剖面的影响、立管顶端浮体运动的耦合、涡激振动抑制措施、振动多模态特性等. | 万德成 端木玉 | 2017 | 力学季刊2017，38，2： | 14 |
| 2 | 圆柱体横流与顺流方向涡激振动耦合模型研究显示文摘基于尾流振子模型对刚性圆柱体在横流以及顺流方向涡激振动耦合模型进行了研究。首先建立了横流以及顺流方向考虑结构几何非线性的结构振子以及尾流振子模型,其次基于二阶精度中心差分格式对模型进行先离散后迭代求解,再次通过与他人实验结果进行对比验证了该数值模型的可靠性,最后对不同质量比、不同结构阻尼比以及不同几何非线性系数下圆柱体涡激振动响应振动幅值以及振动轨迹进行了分析。分析结果表明:随着质量比的增大,横流以及顺流方向的振动幅值均呈下降趋势,锁定区间宽度逐渐变窄。随着结构阻尼比的增大,横流以及顺流方向的振动幅值同样呈下降趋势,而锁定区间宽度逐渐变宽。随着折合速度的增加,结构振动轨迹依次出现斜“8”字形、“月牙”形以及正“8”字形。随着几何非线性系数的增加,横流以及顺流方向振动幅值从上分支进入低分支时的位移突降现象会变得越来越明显。 | 高云 张壮壮 杨斌 邹丽 | 2020 | 振动与冲击2020，39，11： | 10 |
| 3 | The prediction on in-line vortex-induced vibration of slender marine structures显示文摘The in-line (IL) vortex-induced vibration (VIV) that occurs frequently in ocean engineering may cause severe fatigue damage in slender marine structures. To the best knowledge of the authors, in existing literatures, there is no efficient analytical model for predicting pure IL VIV. In this paper, a wake oscillator model capable of analyzing the IL VIV of slender marine structures has been developed. Two different kinds of van der Pol equations are used to describe the near wake dynamics related to the fluctuating nature of symmetric vortex shedding in the first excitation region and alternate vortex shedding in the second one. Some comparisons are carried out between the present model results and experimental data. It is found that many phenomena observed in experiments could be reproduced by the present wake oscillator model. | Wan-Hai Xu Xi-Feng Gao Jie Du | 2012 | Acta Mechanica Sinica2012，28，5： | 7 |
| 4 | 大跨越导线在局部激励下微风振动的格林函数解显示文摘架空线路的微风振动是引起导线疲劳断股、断线的直接原因。随着线路跨距的增大,架空导线呈现出长柔性、小阻尼的结构特点,其微风振动也出现了许多刚性结构中未曾出现的新现象,如锁定区的多模态竞争、涡致波响应以及流体激励力的三维特性等,然而大跨越导线微风振动的本质机理尚不明确。为掌握大跨越架空导线的微风振动机理,建立了在局部横向简谐激励下无限长有阻尼张紧弦强迫振动的线性模型,推导了模型稳态响应的显式格林函数解,得到大跨越导线系统的简化解,讨论了阻尼比和频率比对导线系统响应的影响规律,并依据大跨越导线微风振动参数特性绘制了模型响应的时空演化特性图。研究表明,大跨越导线系统模型在局部横向简谐激励下的响应表现为向激励两端传播的空间衰减的简谐行波,行波特性与激励参数k和系统阻尼比ξ关系密切。 | 陈晓娟 王孟 王璋奇 田瑞 薛博 | 2019 | 振动工程学报2019，32，5： | 6 |
| 5 | 海洋立管涡激振动特性研究综述显示文摘海洋油气田开发中,海洋立管是连接海上平台与海底油气生产系统的关键构件,常年承受风、浪、洋流等外部多流场载荷作用,不可避免地产生涡激振动(vortex induced vibration, VIV),导致管道疲劳受损危害生产安全。随着开采水域不断加深,立管长径比也持续增大,VIV变得更加复杂,使得立管疲劳损伤风险加剧,海洋立管VIV成为海洋油气开发中亟待解决的工程难题。本文从半经验预测模型、VIV的多模态响应及三维特性、外部波浪作用的影响、内外流共同作用的影响、立管群的VIV特性以及VIV的抑制等方面阐述管道VIV的研究现状,最后对海洋立管尚待研究的问题进行展望。研究分析认为,大长径比下的立管多模态响应、管内多相流和外部波流耦合作用下的立管振动特性是未来研究工作的重点。 | 殷布泽 胡其会 李玉星 王武昌 朱建鲁 王冬旭 | 2022 | 船舶力学2022，26，7： | 6 |
| 6 | 基于离散点涡的双自由度涡激振动尾流振子模型研究显示文摘建立了一种新的预报双自由度圆柱涡激振动响应的尾流振子模型,提出了以近壁点涡强度为变量描述尾流振子方程。通过势流理论推导出了结构所受流体流向和横向水动力与点涡强度的量化关系,从而得到了结构振子和流体振子的耦合方程组。使用该模型对圆柱的双自由度涡激振动问题进行了数值计算,得到了结构流向和横向的响应振幅及频率的变化规律。通过与实验结果进行对比,表明模型预测的涡激共振区、锁定频率和'8'字形运动轨迹等结果与实验观测结果基本一致。 | 秦伟 康庄 宋儒鑫 | 2012 | 工程力学2012，29，9： | 5 |
| 7 | Nonplanar flow-induced vibrations of a cantilevered PIP structure system concurrently subjected to internal and cross flows显示文摘Pipe-in-pipe(PIP)structures are widely used in offshore oil and gas pipelines to settle thermal insulation issues.A PIP structure system usually consists of two concentric pipes and one softer layer for thermal insulation consideration.The total response of the system is related to the dynamics of both pipes and the interactions between these two concentric pipes.In the current work,a theoretical model for flow-induced vibrations of a PIP structure system is proposed and analyzed in the presence of an internal axial flow and an external cross flow.The interactions between the two pipes are modeled by a linear distributed damper,a linear distributed spring and a nonlinear distributed spring along the pipe length.The unsteady hydrodynamic forces due to cross flow are modeled by two distributed van der Pol wake oscillators.The nonlinear partial differential equations for the two pipes and the wake are further discretized by the aid of Galerkin’s technique,resulting in a set of ordinary differential equations.These ordinary differential equations are further numeri cally solved by using a fourth-order Runge-Kutta integration algorithm.Phase portraits,bifurcation diagrams,an Argand diagram and oscillation shape diagrams are plotted,showing the existence of a lock-in phenomenon and figure-of-eight trajectory.The PIP system subjected to cross flow displays some interesting dynamical behaviors different from that of a single-pipe structure. | Z.Y.Liu T.L.Jiang L.Wang H.L.Dai | 2019 | Acta Mechanica Sinica2019，35，6： | 5 |
| 8 | PREDICTION OF VORTEX-INDUCED VIBRATION OF LONG FLEXIBLE CYLINDERS MODELED BY A COUPLED NONLINEAR OSCILLATOR:INTEGRAL TRANSFORM SOLUTION显示文摘The Generalized Integral Transform Technique(GITT) was applied to predict dynamic response of Vortex-Induced Vibration(VIV) of a long flexible cylinder.A nonlinear wake oscillator model was used to represent the cross-flow force acting on the cylinder,leading to a coupled system of second-order Partial Differential Equations(PDEs) in temporal variable.The GITT approach was used to transform the system of PDEs to a system of Ordinary Differential Equations(ODEs),which was numerically solved by using the Adams-Moulton and Gear method(DIVPAG) developed by the International Mathematics and Statistics Library(IMSL).Numerical results were presented for comparison to those given by the finite difference method and experimental results,allowing a critical evaluation of the technique performance.The influence of variation of mean axial tension induced by elongation of flexible cylinder was evaluated,which was shown to be not negligible in numerical simulation of VIV of a long flexible cylinder. | GU Ji-jun AN Chen LEVI Carlos SU Jian | 2012 | Journal of Hydrodynamics2012，24，6： | 4 |
| 9 | 水流作用下悬浮隧道耦合动力数值模拟分析显示文摘安装在深水区的悬浮隧道在水流作用下会产生交替脱落的漩涡,从而使得悬浮隧道受到周期性的力,进一步导致悬浮隧道产生涡激振动。当涡脱落频率与悬浮隧道固有频率相接近时会发生“锁定”现象,进而导致悬浮隧道发生振幅较大的运动,类似于结构的共振状态。文章利用有限元数值方法求解不可压缩粘性流体雷诺平均Navier-Stokes方程,并结合任意拉格朗日-欧拉(ALE)动网格方法,对不同雷诺数下(Re=1000~100000)悬浮隧道的涡激振动问题进行了数值模拟研究。计算中悬浮隧道受到弹簧和阻尼的约束,并允许其仅发生横流向的运动,研究了不同结构自振频率下悬浮隧道的受力和运动情况以及不同浮重比情况下悬浮隧道的受力和运动的结果。结果表明,在计算的各雷诺数下,悬浮隧道发生“锁定”的频率基本一致,但是悬浮隧道不同浮重比对“锁定”区间存在影响作用。 | 郭晓玲 金瑞佳 刘名名 耿宝磊 | 2020 | 水道港口2020，41，3： | 4 |
| 10 | Shear flow induced vibrations of long slender cylinders with a wake oscillator model显示文摘A time domain model is presented to study the vibrations of long slender cylinders placed in shear flow. Long slender cylinders such as risers and tension legs are widely used in the field of ocean engineering. They are subjected to vortex-induced vibrations(VIV) when placed within a transverse incident flow. A three dimensional model coupled with wake oscillators is formulated to describe the response of the slender cylinder in cross-flow and in-line directions. The wake oscillators are distributed along the cylinder and the vortex-shedding frequency is derived from the local current velocity. A non-linear fiuid force model is accounted for the coupled effect between cross-flow and in-line vibrations. The comparisons with the published experimental data show that the dynamic features of VIV of long slender cylinder placed in shear flow can be obtained by the proposed model,such as the spanwise average displacement,vibration frequency,dominant mode and the combination of standing and traveling waves. The simulation in a uniform flow is also conducted and the result is compared with the case of nonuniform flow. It is concluded that the flow shear characteristic has significantly changed the cylinder vibration behavior. | Fei Ge Wei Lu Lei Wang You-Shi Hong | 2011 | Acta Mechanica Sinica2011，27，3： | 3 |
| 11 | An experimental investigation of dual-resonant and non-resonant responses for vortex-induced vibration of a long slender cylinder显示文摘Experimental results of the dual-resonant and non-resonant responses are presented for vortex-induced vibrations(VIV)of a long slender cylinder.The cylinder has a diameter of 10mm and a length of 3.31 m,giving an aspect ratio of 331.The cylinder was towed by a carriage with the velocity up to 1.5 m/s,with the Reynolds number varying from 2500 to 38000.Three different weights were used to provide the initial tension.Dual resonance means that resonance occurs simultaneously in both the cross-flow(CF)and in-line(IL)directions.The experiments were conducted in two stages.At the first stage,dual-resonant dynamic features of the cylinder subjected to vortex-induced excitation were investigated.The features of CF and IL vibration amplitude,motion orbits,phase angle differences,dominant frequencies and mode order numbers are presented.At the second stage of the experiments,particular emphasis was placed on non-resonant dynamic features.The variation of multi-mode modal displacement amplitudes was investigated in detail. | WU XiaoDong GE Fei HONG YouShi | 2014 | Science China(Physics,Mechanics & Astronomy)2014，57，2： | 3 |
| 12 | Vortex-Induced Vibrations of A Long Flexible Cylinder in Linear and Exponential Shear Flows显示文摘A numerical study based on a wake oscillator model was conducted to determine the response performance of vortex-induced vibration(VIV) on a long flexible cylinder with pinned-pinned boundary conditions subjected to linear and exponential shear flows. The coupling equations of a structural vibration model and wake oscillator model were solved using a standard central finite difference method of the second order. The VIV response characteristics including the structural displacement, structural frequency, structural wavenumber, standing wave behavior,travelling wave behavior, structural velocity, lift force coefficient and transferred energy from the fluid to the structure with different flow profiles were compared. The numerical results show that the VIV displacement is a combination of standing waves and travelling waves. For linear shear flow, standing waves and travelling waves dominate the VIV response within the low-velocity and high-velocity zones, respectively. The negative values of the transferred energy only occur within the low-velocity zone. However, for exponential shear flow, travelling waves dominate the VIV response and the negative energy occurs along the entire length of the cylinder. | GAO Yun YANG Bin ZOU Li ZONG Zhi ZHANG Zhuang-zhuang | 2019 | China Ocean Engineering2019，33，1： | 3 |
| 13 | 涡激振动行波动力学特征的数值模拟显示文摘采用数值模拟分析了水中大长径比结构物涡激振动行波动力学特征,以及水动力学阻尼和模型初始张力对于行波动力学特征的影响.数值模拟模型采用改进的尾流振子模型,该模型考虑了涡激振动横向运动和顺流向运动之间的耦合,考虑了张力沿模型长度的变化和流体的耗散.给出了用于评估行波在整个振动波中所占比例的方法,该方法采用行波椭圆来定量表征行波所占的比例,即行波比.数值模拟结果显示,行波比总体上呈现随流速增加的趋势,但在模态阶数变化的临界流速上突然降低.水动力学阻尼显著影响着行波比,阻尼比越大,行波比越大,行波对于整个振动波的贡献就越大.不同张力情况下,行波比突然下降的临界速度不同.初始张力影响模型的固有频率,影响模态阶数发生转变的流速,从而影响了行波比突然下降的临界流速. | 武晓东 张煜航 葛斐 洪友士 | 2018 | 动力学与控制学报2018，16，3： | 2 |
| 14 | 刚性圆柱结构顺流向涡激振动特性分析(英文)显示文摘文章研究了刚性支承圆柱的顺流向涡激振动特性,在第二激励区域,运用van der Pol方程描述漩涡脱落的尾迹特性,采用尾流振子模型计算圆柱结构的响应,讨论和分析了质量-阻尼参数、质量率和结构阻尼对顺流向涡激振动的影响机理。 | 徐万海 吴应湘 胡松涛 杜杰 | 2012 | 船舶力学2012，16，9： | 1 |
| 15 | 气-液横向流动下悬臂柱体结构涡激振动机理研究显示文摘针对潜艇侦查望远镜举升水面时产生的涡激振动现象,该文建立了悬臂柱体结构受气-液两种不同横向流作用下的涡激振动理论模型.研究了两种流体不同的分布比和密度比对柱体结构涡激振动行为的影响规律.基于Galerkin法和Runge-Kutta法,得到了柱体结构涡激振动响应的数值结果.研究表明,柱体结构的涡激振动锁频区随着流体分布比的增大而增大,自由端最大幅值随着流体分布比的增大先增大后减小.当分布比为0.5附近时,振幅出现极大值,该极大值随着流体密度比的减小呈现明显的增大趋势.此外,柱体的动力学行为随着流体分布比的变化呈现出周期和多周期等振动模式.该研究可为潜艇侦查望远镜结构的设计与分析提供理论指导意义. | 严浩 代胡亮 王琳 倪樵 | 2022 | 应用数学和力学2022，43，5： | 1 |
| 16 | 尾流振子涡激振动能量收集系统设计显示文摘对尾流振子模型进行了数值模拟分析,运用格子Boltzmann方法对流场进行求解,得到最适合能量收集的尾流振子两柱间距和流体雷诺数.采用压电悬臂梁结构,结合流机电耦合方程对不同雷诺数(5 000≤Re≤15 000)下涡激振动的能量收集特性进行分析.结果表明,当7 000≤Re≤12 000时为涡激振动的锁振范围,当Re为8 000时振幅最大.改变两柱间距,对尾流振子模型的能量收集特性进行分析,可得所设计系统的理想间距为0.11 m,产生电压为38 V.当两柱间距为理想间距时,尾迹旋涡形态图中平行于Y轴的方向只有一个独立涡,此时振幅最大. | 李言钦 关雪丰 王军雷 | 2018 | 郑州大学学报(理学版)2018，50，3： | 1 |
| 17 | 变张力细长柔性立管涡激振动响应特性数值研究显示文摘基于尾流振子模型,对轴向时变张力下细长柔性立管涡激振动响应特性进行数值研究。研究考虑三种不同的流剖面:线性剪切、指数剪切、以及真实阶梯流剖面;采用二阶中心差分方法求解结构振动和尾流振子的耦合方程;系统地比较三种不同流剖面下结构的振动位移、振动频率、位移包络线,以及位移时空演化等VIV响应特性。数值结果表明,线性剪切流下VIV振动位移和振动频率均与真实阶梯流下位移和频率存在很大差别,指数剪切流下VIV振动位移与真实阶梯流下情况非常接近,但指数剪切流下VIV振动频率与真实阶梯流下频率仍有较大差别。 | 高云 潘港辉 刘磊 柴盛林 | 2023 | 船舶力学2023，27，9： | 0 |
| 18 | 海洋平台垂荡作用下立管的非线性涡激振动特性研究显示文摘立管是海洋工程中常用的一种典型细长体结构物,研究立管在海洋平台垂荡和内外流体共同作用下的非线性动力学特性具有重要的学术意义和应用价值。本文采用Hamilton原理和Galerkin方法建立了顶张力立管的二维非线性动力学模型,将平台垂荡运动模拟为随时间变化的顶端张力,研究海洋平台运动和立管非线性涡激振动的耦合位移响应。研究结果显示,增加顶张力可以改变结构的固有频率,在可变张力作用下,立管的位移响应在相邻模态之间可以相互转换。通过与已有实验数据进行对比,验证了本文分析方法和数值计算结果的合理性。本文研究结果可为海洋立管的非线性涡激振动分析提供理论参考。 | 朱磊 李凤明 陈永訢 | 2023 | 船舶力学2023，27，2： | 0 |
| 19 | 均匀流作用下海洋悬链线立管的振动特性研究显示文摘对于大细长比海洋柔性立管,当涡激振动产生的涡旋脱落频率接近一个固有频率时,柔性立管就会产生该固有频率对应阶次的模态的振动特性,本文通过OrcaFlex软件对顶张力为0.04 kN的大长细比柔性立管在不同均匀流下的响应频率和模态等振动特性进行数值模拟分析。研究结果表明:立管响应频率、模态与流速呈正相关;流速越大立管的空间形态越是复杂且“扭转节”越多;立管的运动轨迹呈现为“8”字形状,且水深、流速和流向决定“8”字形的大小、绕行方向及弯曲方向;横流向(Cross-line,CF)、顺流向(In-line,IL)的相位差决定立管运动轨迹的绕行方向和形状。研究结果对海洋柔性立管的涡激振动研究具有参考意义。 | 赵林 褚凯丽 张无际 | 2022 | 海洋技术学报2022，41，6： | 0 |
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