基础激励作用下悬臂输流管的振动实验研究

通过实验的方法对基础激励作用下悬臂输流管的动力学行为进行振动测试分析.设计并搭建了悬臂输流管振动测试的实验平台，深入研究了悬臂输流管在不同流速及不同参数情况下的振动行为，分析了在基础激励作用下,悬臂输流管振幅的变化规律.结果表明,悬臂输流管的物理参数对悬臂输流管发生颤振失稳的临界流速有着极其显著的影响，在基础激励作用下，悬臂输流管的振幅明显增大,并且当激振力频率接近悬臂输流管的固有频率时，输流管的振幅达到最大.

EXPERIMENTAL STUDY ON VIBRATION OF CANTILEVER PIPE CONVEYING FLUID UNDER FUNDAMENTAL EXCITATION

In this paper, dynamic behaviors of a cantilever pipe conveying fluid are investigated by using experimental method. The experimental platform related to vibration experiment of the cantilever pipe conveying fluid is designed and established. The fundamental excitation is applied to study variations of the vibration amplitude of the pipe conveying fluid. The influences of flow speed, fundamental excitation and wall thickness on vibrations of the pipe are studied. The results demonstrate that the experimental parameters of the cantilever pipe conveying fluid have a significant effect on the critical flow velocity associated with flutter instability. Under the fundamental excitation, the vibration amplitude of the pipe increases significantly. When the frequency of the fundamental excitation is close to the natural frequency of the cantilever pipe conveying fluid, the vibration amplitude of the pipe reaches the maximum value.