CAJ | 학술논문

运用非接触测振技术对两端固定输流管道在脉动流作用下的参数共振问题进行了实验研究。通过搭建的实验平台，在功能上实现对流速、脉动频率以及脉动幅值的有效控制，实验通过激光测振技术获取实验管道的振动信息，通过多组测试，利用实验结果拟合出管道第一振型1/2次谐波参数共振区域，与理论计算结果定性上一致。
운용비접촉측진기술대량단고정수류관도재맥동류작용하적삼수공진문제진행료실험연구。통과탑건적실험평태，재공능상실현대류속、맥동빈솔이급맥동폭치적유효공제，실험통과격광측진기술획취실험관도적진동신식，통과다조측시，이용실험결과의합출관도제일진형1/2차해파삼수공진구역，여이론계산결과정성상일치。
The technique of non-contact vibration measurement was applied to the experimental investigation of parametric resonance of a fluid pipeline with both ends clamped under pulsating flow excitation. The experimental platform has a nice function for control of flow velocity, pulsation frequency and pulsation amplitude. The technique of laser vibration measurement was employed to obtain the information of the pipeline’s vibration. Based on the results of several sets of experiments, the regions of 1/2 sub-harmonic parametric resonance of the first modal of the pipeline were determined. The results were qualitatively consistent with those of the theoretical calculation.