矩形通道中两端固定柔性单板湍流微振的研究
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摘要
平行板燃料组件的流致振动特性研究对于保证核反应堆的安全可靠运行具有重要意义。本文将平行板燃料组件简化成一个在矩形通道中两端固定的柔性单板结构,研究其振动机理,为研究平行板燃料组件的流致振动特性奠定基础。利用加速度传感器等测得实验用铝板的固有频率和弹性模量,使用应变片和激光位移传感器测量平板在不同流速下的振动频率和位移。结果表明:在目前的实验条件下,平板的振动表现为一种由于湍流引起的复杂的随机振动;平板在水中的振动位移随流速的增大而变大;随着流速的增大,平板振动加剧,振动表现为低频成分减少,高频成分增加。
Research on flow-induced vibration(FIV) of the parallel-plate fuel assembly plays an important role in the reactor safety analysis.In this paper,the vibration mechanism of a simplified double-ends-fixed flexible plate in the rectangular channel was researched,which lays the foundation for the flow-induced vibration research on the parallel-plate fuel assembly.In the experiment,the natural frequency and actual elastic modulus of the plate were investigated with an acceleration sensor,and the relative vibrant frequency and displacement were measured by strain gauges and laser displacement sensor in different velocities.The results indicate that the plate vibration in the water behaves as a complicated turbulence-induced one.The higher the velocity is,the bigger the vibration displacement is.With the velocity increasing,the plate vibrates severely.The low frequency reduces,while the high frequency increases.
Research on flow-induced vibration(FIV) of the parallel-plate fuel assembly plays an important role in the reactor safety analysis.In this paper,the vibration mechanism of a simplified double-ends-fixed flexible plate in the rectangular channel was researched,which lays the foundation for the flow-induced vibration research on the parallel-plate fuel assembly.In the experiment,the natural frequency and actual elastic modulus of the plate were investigated with an acceleration sensor,and the relative vibrant frequency and displacement were measured by strain gauges and laser displacement sensor in different velocities.The results indicate that the plate vibration in the water behaves as a complicated turbulence-induced one.The higher the velocity is,the bigger the vibration displacement is.With the velocity increasing,the plate vibrates severely.The low frequency reduces,while the high frequency increases.
引文
[1]DOAN R L.The engineering test reactor—A statusreport[J].Nucleonics,1958,16:102-105.
[2]MILLER D R.Critical flow velocities for col-lapse of reactor parallel-plate fuel assemblies[J].Trans ASME J Eng Power,1960,82:83-99.
[3]GRONINGER R D,KANE J J.Flow-induceddeflections of parallel flat plates[J].Nucl SciEng,1963,16:218-226.
[4]陈贵清,杨翊仁.受非线性支承的板状梁结构流致振动研究[J].固体力学学报,2003,24(3):277-283.CHEN Guiqing,YANG Yiren.Study on flow-induced vibration for a plate-type beam structurewith nonlinear suppor[J].Acta Mechanica SolidaSinica,2003,24(3):277-283(in Chinese).
[5]闵刚,薄涵亮,姜胜耀,等.板状燃料组件流致振动实验研究[J].清华大学学报:自然科学版,2004,44:350-353.MIN Gang,BO Hanliang,JIANG Shengyao,etal.Flow-induced vibrations in parallel-plate fuelassemblies[J].J Tsinghua Univ:Sci&Tech,2004,44:350-353(in Chinese).
[6]崔振东,唐益群,郭长青,等.叠层板状结构的流致振动与稳定性[J].地震工程与工程振动,2007,27:86-91.CUI Zhendong,TANG Yiqun,GUO Changqing,et al.Flow-induced vibration and stability of par-allel-plate assembly[J].Earthquake Engineeringand Engineering Vibration,2007,27:86-91(inChinese).
[7]CHEN ShoeiSheng.圆柱结构的流致诱发振动[M].冯振宇,张希农,译.北京:石油工业出版社,1993.
[8]张思.振动测试与分析技术[M].北京:清华大学出版社,1992.
[2]MILLER D R.Critical flow velocities for col-lapse of reactor parallel-plate fuel assemblies[J].Trans ASME J Eng Power,1960,82:83-99.
[3]GRONINGER R D,KANE J J.Flow-induceddeflections of parallel flat plates[J].Nucl SciEng,1963,16:218-226.
[4]陈贵清,杨翊仁.受非线性支承的板状梁结构流致振动研究[J].固体力学学报,2003,24(3):277-283.CHEN Guiqing,YANG Yiren.Study on flow-induced vibration for a plate-type beam structurewith nonlinear suppor[J].Acta Mechanica SolidaSinica,2003,24(3):277-283(in Chinese).
[5]闵刚,薄涵亮,姜胜耀,等.板状燃料组件流致振动实验研究[J].清华大学学报:自然科学版,2004,44:350-353.MIN Gang,BO Hanliang,JIANG Shengyao,etal.Flow-induced vibrations in parallel-plate fuelassemblies[J].J Tsinghua Univ:Sci&Tech,2004,44:350-353(in Chinese).
[6]崔振东,唐益群,郭长青,等.叠层板状结构的流致振动与稳定性[J].地震工程与工程振动,2007,27:86-91.CUI Zhendong,TANG Yiqun,GUO Changqing,et al.Flow-induced vibration and stability of par-allel-plate assembly[J].Earthquake Engineeringand Engineering Vibration,2007,27:86-91(inChinese).
[7]CHEN ShoeiSheng.圆柱结构的流致诱发振动[M].冯振宇,张希农,译.北京:石油工业出版社,1993.
[8]张思.振动测试与分析技术[M].北京:清华大学出版社,1992.
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