Research on vortex-induced vibration of flexible pipes at different locations in a limited fluid domain
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摘要: 针对有限流体域内柔性管的涡致振动问题,将柔性管离散为若干空间梁单元,流体域采用实体单元离散,建立了有限流体域内柔性管系统的流固耦合模型及数值计算方法,设计并加工圆柱流体域内柔性管振动专用实验装置,采用GWT2B双轴加速度传感器对柔性管的振动进行监测,并与数值模拟结果进行对比,吻合程度较好.基于该文的模型和方法,对圆柱流体域内不同位置处柔性管的涡致振动机理进行研究.结果表明,柔性管偏离入口流速位置的角度越大,越容易发生流体弹性不稳定性,柔性管的振动愈剧烈;而正对入口流速的位置,不易发生流体弹性不稳定性,柔性管振动减弱.Abstract: In view of the vortex-induced vibration of flexible pipes in a limited fluid domain, the flexible pipe was numerically discretized into 3D beam elements and the fluid body was discretized into solid elements. The fluid-structure interaction model and numerical calculation method were set up for the flexible pipe in the limited fluid domain. A special experimental device was designed and machined for the test of flexible pipe vibration in the cylindrical fluid container. In the experiment, the GWT-2B-axis accelerometers were used to monitor the vibration. Comparison between the tested vibration results and the numerical simulation results showed a good degree of agreement. Based on the established model and methods, the vortex-induced vibration mechanism was studied for the flexible pipe at different locations in the cylindrical fluid domain. The results show that, the bigger the deviation angle at which the flexible pipe is located from the inlet velocity is, the easier the fluid elastic instability is to occur and the more intense the flexible pipe vibration is. However, when the flexible pipe is opposite the inlet velocity, the fluid elastic instability is less easy to occur and the flexible pipe vibration is weakened.
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[1] 赖永星, 刘敏珊, 董其伍. 圆管绕流旋涡脱落诱导振动的数值模拟[J]. 动力学与控制学报, 2005,3(1): 86-91.(LAI Yong-xing, LIU Min-shan, DONG Qi-wu. Numerical simulation of induced vibration for viscous flow past a circular cylinder[J]. Journal of Dynamics and Control,2005,3(1): 86-91.(in Chinese)) [2] 赖永星, 刘敏珊, 董其伍. 具有内外流的换热器管束动特性分析[J]. 振动与冲击, 2006,25(2): 159-162.(LAI Yong-xing, LIU Min-shan, DONG Qi-wu. Dynamic characteristic analysis of heat exchanger tube bundles with internal and external fluid[J]. Journal of Vibration and Shock,2006,25(2): 159-162.(in Chinese)) [3] 吴皓, 谭蔚, 聂清德. 正方形排布管束流体弹性不稳定性数值计算模型研究[J]. 振动与冲击, 2013,32(21): 102-106.(WU Hao, TAN Wei, NIE Qing-de. A numerical model for fluid-elastic instability of a square tube array[J]. Journal of Vibration and Shock,2013,32(21): 102-106.(in Chinese)) [4] Ichioka T, Kawata Y, Nakamura T, Izumi H, Kobayashi T, Takamatsu H. Research on fluid elastic vibration of cylinder arrays by computational fluid dynamics: analysis of two cylinder and a cylinder row[J]. JSME International Journal Series B: Fluids and Thermal Engineering,1997,40(1): 16-24. [5] Hassan M, Hayder M. Modelling of fluidelastic vibrations of heat exchanger tubes with loose supports[J]. Nuclear Engineering and Design,2008,238(10): 2507-2520. [6] Khulief Y A, Al-Kaabi S A, Said S A, Anis M. Prediction of flow-induced vibrations in tubular heat exchangers—part I: numerical modeling[J]. Journal of Pressure Vessel Technology,2009,131(1): 011301-011308. [7] Oviedo-Tolentino F, Pérez-Gutiérrez F G, Romero-Méndez R. Vortex-induced vibration of a bottom fixed flexible circular beam[J]. Ocean Engineering,2014,88(15): 463-471. [8] 冯志鹏, 张毅雄, 臧峰刚, 叶献辉. 三维弹性管的涡致振动特性分析[J]. 应用数学和力学, 2013,34(9): 976-985.( FENG Zhi-peng, ZHANG Yi-xiong, ZANG Feng-gang, YE Xian-hui. Analysis of vortex-induced vibration characteristics for a three dimensional flexible tube[J]. Applied Mathematics and Mechanics,2013,34(9): 976-985.(in Chinese)) [9] 冯志鹏, 臧峰刚, 张毅雄, 余晓菲, 叶献辉. 弹性管涡致振动的理论模型与数值模拟[J]. 应用数学和力学, 2014,35(5): 581-588.(FENG Zhi-peng, ZANG Feng-gang, ZHANG Yi-xiong, YU Xiao-fei, YE Xian-hui. Theoretical model and numerical simulation of vortex induced flexible tube vibration[J]. Applied Mathematics and Mechanics,2014,35(5): 581-588.(in Chinese)) [10] 冯志鹏, 张毅雄, 臧峰刚. 直管束流固耦合振动的数值模拟[J]. 应用数学和力学, 2013,34(11): 1165-1172.(FENG Zhi-peng, ZHANG Yi-xiong, ZANG Feng-gang. Numerical simulation of fluid-structure interaction for tube bundles[J]. Applied Mathematics and Mechanics,2013,34(11): 1165-1172.(in Chinese)) [11] 张强, 刘巨保, 罗敏, 张艳鸣. 圆筒内旋转细长管与流体界面耦合的数值方法[J]. 计算力学学报, 2011,28(4): 601-606.(ZHANG Qiang, LIU Ju-bao, LUO Min, ZHANG Yan-ming. Numerical simulation on interface coupling of rotary slender pipe and fluid in cylinder[J]. Chinese Journal of Computational Mechanics,2011,28(4): 601-606.(in Chinese)) [12] 刘巨保, 罗敏, 王琳, 栾一秀. 管道内旋转细长梁的固液耦合方法研究[J]. 工程力学, 2011,28(4): 251-256.(LIU Ju-bao, LUO Min, WANG Lin, LUAN Yi-xiu. Methodology of fluid-structure interaction of rotary slender beam in pipe[J]. Engineering Mechanics,2011,28(4): 251-256.(in Chinese))
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