【作者】 金基铎； 梁峰； 张宇飞； 杨晓东；

【Author】 Jin Jiduo Liang Feng Yang Xiaodong Zhang Yufei Shenyang Institute of Aeronautical Engineering,Shenyang,110034

【机构】 沈阳航空工业学院；

【摘要】 用实验方法研究了一端固定一端铰支输流管道在脉动内流作用下的参数共振问题。主要分析了第一振型1/2次谐波参数共振现象。实验结果表明,当平均流速达到一定值时,一端固定一端铰支管道在一定的脉动流振幅和脉动频率下会产生第一振型1/2次谐波参数共振。脉动流振幅越大,发生参数共振的频率范围也越大。当脉动流振幅小于一定值时,不再发生参数共振。平均流速越大,发生参数共振所需要的脉动流频率就越小。更多还原

【Abstract】 The parametric resonance of a clamped-pinned pipe conveying fluid is investigated experimentally.The resonance with the first mode of order 1/2 is analyzed for some different values of mean flow velocity.Unstable regions of the pipe are obtained experimentally.The following phenomena are found from the experiments:1.For a given value of mean flow velocity,the first mode parametric resonance may occur under certain values of amplitude and frequency of pulsating fluid.When the amplitude of the pulsating fluid is less than a certain value,the resonance can not occur again;2.When the mean velocity of flow is decreased,the region of the parametric resonance moves towards the lefts side.更多还原