中文摘要：

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。对实验管道在几种不同的平均流速下做了多次重复实验，获得了第一振型1／2次谐波参数共振相关实验数据。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，即低频脉动时平均流速越大管道越容易失稳。实验结果与理论分析结果是一致的。对可能引起定量误差的原因进行了较详细的分析。

英文摘要：

The parametric resonance of clamped--pinned pipes conveying fluid was investigated experimentally. The resonance with the first mode of order 1/2 was analyzed for some different values of mean flow velocity. Unstable regions of several pipes were obtained experimentally. The results show that the property of instability observed in the experiments is in good agreement qualitatively with that given by the theory. The following phenomena are found from the experiments, 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~when the mean velocity of flow is decreased, the region of the parametric resonance moves to wards the lefts side. This implies that as the value of mean flow velocity increases the parametric resonance may take place more easily with relatively lower frequency of the pulsating flow.