燃料相关组件棒流致振动可视化实验研究
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摘要
悬臂梁在反应堆系统当中是常见结构,悬臂组件棒在冷却剂轴向外流冲刷下会发生湍流激振现象,有害的振动将威胁到相关结构的完整性,而目前对大长径比组件棒在极小环隙下的流致振动特性缺乏有效的测量手段。为了解决对大长径比组件棒在极小环隙下的流致振动特性的测量问题,本文提出了可视化测量方法,使用了高速相机对悬臂梁轴向外流流致振动特性进行研究。通过外部施加单点激励单点拾振的方式,得到了相关组件棒的干模态参数,同时使用2台相机同步拍摄获得了组件棒的二维运动轨迹;实验结果表明:棒的自由端振动相较于固定端更剧烈;低流速时,棒的振幅随着流速增大而增大,振幅在0.2 mm以下,而高流速时,棒存在接触壁面的情况,使得棒振幅减小。
The cantilever is a common structure in the reactor system. A turbulent excitation phenomenon occurs in the cantilever assembly rod during the axial outflow of the coolant in the washing-out phase, and this harmful vibration threatens the integrity of the associated structure. As yet, there is no effective means for measuring the flow-induced vibration characteristics of component rods with large length-to-diameter ratios and a very small annulus. To solve this problem, in this paper, we propose a visual measurement method that makes use of a high speed camera to study the vibration characteristics of the axial outflow of the cantilever beam. We obtained the dry mode parameters of the relevant component rods by applying external single-point excitation single-point pick-up. At the same time, we obtained the two-dimensional motion trajectory of the component rods by shooting two cameras simultaneously. The test results show that the vibration at the free end of the rods is more intense than at the fixed end. At low flow rates, the amplitude of the rod increases with increasing flow rate, and the amplitude is below 0.2 mm. At high flow rates, however, the rods come in contact with the wall surface at times, which decreases their amplitude.
The cantilever is a common structure in the reactor system. A turbulent excitation phenomenon occurs in the cantilever assembly rod during the axial outflow of the coolant in the washing-out phase, and this harmful vibration threatens the integrity of the associated structure. As yet, there is no effective means for measuring the flow-induced vibration characteristics of component rods with large length-to-diameter ratios and a very small annulus. To solve this problem, in this paper, we propose a visual measurement method that makes use of a high speed camera to study the vibration characteristics of the axial outflow of the cantilever beam. We obtained the dry mode parameters of the relevant component rods by applying external single-point excitation single-point pick-up. At the same time, we obtained the two-dimensional motion trajectory of the component rods by shooting two cameras simultaneously. The test results show that the vibration at the free end of the rods is more intense than at the fixed end. At low flow rates, the amplitude of the rod increases with increasing flow rate, and the amplitude is below 0.2 mm. At high flow rates, however, the rods come in contact with the wall surface at times, which decreases their amplitude.
引文
[1] AIT ABDERRAHMANE H,PAIDOUSSIS M P,FAYED M,et al.Flapping dynamics of a flexible filament[J].Physical review E,2011,84(6):066604.
[2] 王鹏.双圆柱体布局下的轴向流致振动实验研究[D].哈尔滨:哈尔滨工业大学,2017.WANG Peng.Axial flow-induced vibration of a twin cylinder configuration[D].Harbin:Harbin Institute of Technology,2017.
[3] PA?DOUSSIS M P,PRICE S J,DE LANGRE E.Fluid-structure interactions:cross-flow-induced instabilities[M].Cambridge:Cambridge University Press,2011.
[4] CHEN S S.Flow-induced vibration of circular cylindrical structures[M].Berlin:Springer-Verlag,1987:63.
[5] 孙汉虹,程平东,缪鸿兴,等.第三代核电技术AP1000[M].北京:中国电力出版社,2010.
[6] 邢景棠,周盛,崔尔杰.流固耦合力学概述[J].力学进展,1997,27(1):19-38.XING Jingtang,ZHOU Sheng,CUI Erjie.A survey on the fluid-solid interaction mechanics[J].Advances in mechanics,1997,27(1):19-38.
[7] 包日东,闻邦椿.水下悬跨输流管道流致振动响应研究[J].地震工程与工程振动,2009,29(3):115-120.BAO Ridong,WEN Bangchun.Study on dynamic responses of submarine fluid conveying pipeline under eddy stimulation[J].Earthquake engineering and engineering vibration,2009,29(3):115-120.
[8] 冯志鹏,臧峰刚,张毅雄,等.流体诱发传热管振动的流场特性分析[J].核动力工程,2014,35(2):71-75.FENG Zhipeng,ZANG Fenggang,ZHANG Yixiong,et al.Flow characteristic analysis of flow induced heat exchanger tube vibration[J].Nuclear power engineering,2014,35(2):71-75.
[9] 喻丹萍,胡永陶.秦山核电二期工程反应堆堆内构件模型流致振动试验研究[J].核动力工程,2003,24(S1):109-113.YU Danping,HU Yongtao.Experimental study of flow-induced vibration of the reactor internal in Qinshan phase Ⅱ NPP project[J].Nuclear power engineering,2003,24(S1):109-113.
[10] 蒋莉,王建立,孙成海,等.有界域轴向流动棒束流致振动附加质量力模型[J].原子能科学技术,1999,33(5):431-435.JIANG Li,WANG Jianli,SUN Chenghai,et al.Mathematical models for fluid inertial forces added on the rod bundle vibrating in the bounded axial flow[J].Atomic energy science and technology,1999,33(5):431-435.
[11] KANG H S,MURIETHI N K,PETTIGREW M J.An experimental investigation on the narrow annular-flow-induced vibration instability of a tube[M]//KASSAB A J,BREBBIA C A,DIVO E A,et al.Fluid Structure Interaction VI.Southampton:WIT Press,2011:11-19.
[12] 杨安良,龚圣捷,顾汉洋.流致振动激光多普勒测振方法研究[J].测试技术学报,2015,29(2):93-99.YANG Anliang,GONG Shengjie,GU Hanyang.An investigation of laser Doppler vibrometer measurement technique on flow-induced vibration[J].Journal of test and measurement technology,2015,29(2):93-99.
[13] 刘军,高建立,穆桂脂,等.改进锤击法试验模态分析技术的研究[J].振动与冲击,2009,28(3):174-177.LIU Jun,GAO Jianli,MU Guizhi,et al.An improved experimental modal analysis system with hammering method[J].Journal of vibration and shock,2009,28(3):174-177.
[14] DE PAUW B,WEIJTJENS W,VANLANDUIT S,et al.Operational modal analysis of flow-induced vibration of nuclear fuel rods in a turbulent axial flow[J].Nuclear engineering and design,2015,284:19-26.
[15] 吴毓熙.应用弹性力学[M].上海:同济大学出版社,1989.
[2] 王鹏.双圆柱体布局下的轴向流致振动实验研究[D].哈尔滨:哈尔滨工业大学,2017.WANG Peng.Axial flow-induced vibration of a twin cylinder configuration[D].Harbin:Harbin Institute of Technology,2017.
[3] PA?DOUSSIS M P,PRICE S J,DE LANGRE E.Fluid-structure interactions:cross-flow-induced instabilities[M].Cambridge:Cambridge University Press,2011.
[4] CHEN S S.Flow-induced vibration of circular cylindrical structures[M].Berlin:Springer-Verlag,1987:63.
[5] 孙汉虹,程平东,缪鸿兴,等.第三代核电技术AP1000[M].北京:中国电力出版社,2010.
[6] 邢景棠,周盛,崔尔杰.流固耦合力学概述[J].力学进展,1997,27(1):19-38.XING Jingtang,ZHOU Sheng,CUI Erjie.A survey on the fluid-solid interaction mechanics[J].Advances in mechanics,1997,27(1):19-38.
[7] 包日东,闻邦椿.水下悬跨输流管道流致振动响应研究[J].地震工程与工程振动,2009,29(3):115-120.BAO Ridong,WEN Bangchun.Study on dynamic responses of submarine fluid conveying pipeline under eddy stimulation[J].Earthquake engineering and engineering vibration,2009,29(3):115-120.
[8] 冯志鹏,臧峰刚,张毅雄,等.流体诱发传热管振动的流场特性分析[J].核动力工程,2014,35(2):71-75.FENG Zhipeng,ZANG Fenggang,ZHANG Yixiong,et al.Flow characteristic analysis of flow induced heat exchanger tube vibration[J].Nuclear power engineering,2014,35(2):71-75.
[9] 喻丹萍,胡永陶.秦山核电二期工程反应堆堆内构件模型流致振动试验研究[J].核动力工程,2003,24(S1):109-113.YU Danping,HU Yongtao.Experimental study of flow-induced vibration of the reactor internal in Qinshan phase Ⅱ NPP project[J].Nuclear power engineering,2003,24(S1):109-113.
[10] 蒋莉,王建立,孙成海,等.有界域轴向流动棒束流致振动附加质量力模型[J].原子能科学技术,1999,33(5):431-435.JIANG Li,WANG Jianli,SUN Chenghai,et al.Mathematical models for fluid inertial forces added on the rod bundle vibrating in the bounded axial flow[J].Atomic energy science and technology,1999,33(5):431-435.
[11] KANG H S,MURIETHI N K,PETTIGREW M J.An experimental investigation on the narrow annular-flow-induced vibration instability of a tube[M]//KASSAB A J,BREBBIA C A,DIVO E A,et al.Fluid Structure Interaction VI.Southampton:WIT Press,2011:11-19.
[12] 杨安良,龚圣捷,顾汉洋.流致振动激光多普勒测振方法研究[J].测试技术学报,2015,29(2):93-99.YANG Anliang,GONG Shengjie,GU Hanyang.An investigation of laser Doppler vibrometer measurement technique on flow-induced vibration[J].Journal of test and measurement technology,2015,29(2):93-99.
[13] 刘军,高建立,穆桂脂,等.改进锤击法试验模态分析技术的研究[J].振动与冲击,2009,28(3):174-177.LIU Jun,GAO Jianli,MU Guizhi,et al.An improved experimental modal analysis system with hammering method[J].Journal of vibration and shock,2009,28(3):174-177.
[14] DE PAUW B,WEIJTJENS W,VANLANDUIT S,et al.Operational modal analysis of flow-induced vibration of nuclear fuel rods in a turbulent axial flow[J].Nuclear engineering and design,2015,284:19-26.
[15] 吴毓熙.应用弹性力学[M].上海:同济大学出版社,1989.