两端固定输流管振动实验研究

通过实验的方法对简谐激励和脉动流作用下的两端固定输流管的动力学行为进行振动测试分析.设计并制作了两端固定输流管的振动实验装置,为确保实验结果翔实可靠,选取三种不同材料的管分别进行了三次实验,研究了管内流体流速、激振力振幅和脉动流频率对两端固定输流管振动特性的影响.结果表明,流体流速和激振力幅值对两端固定输流管的一阶共振特性和振动幅值有着显著影响,在脉动流作用下,两端固定输流管存在混沌运动,并且随着脉动频率的增大,管道平均振幅减小.

Experimental Study on Vibration of Clamped Clamped Pipe Conveying Fluid

The dynamic behaviors of the clamped clamped pipe conveying fluid under the harmonic excitation and pulsating flow are investigated by using the experimental method. The vibration experimental equipment of the clamped clamped pipe conveying fluid is designed and made. In order to ensure that the experimental results are accurate and reliable, three pipes of different materials are selected for the experiments. The influences of the fluid velocity, excitation amplitude and pulsating flow frequency on the vibration characteristics of the clamped clamped pipe conveying fluid are studied. The results show that the fluid velocity and excitation amplitude have a significant impact on the first order resonant characteristics and vibration amplitude of the clamped clamped pipe conveying fluid. There are the chaotic vibrations in the clamped clamped pipe conveying fluid under pulsating flow. The average amplitude of the pipes decreases with the increase of the pulsation frequency.