摘要
研究了两端铰支输流管道在脉动内流作用下的参数共振问题。用数值方法分析了各种参数共振的响应曲线 ,其存在区域以及响应频率与脉动流频率之间的关系。研究结果发现 ,组合共振区域内发生两种不同的拟周期运动和组合周期运动 ,而且第一振型次谐波共振曲线延伸到组合共振区域。因此 ,在同一脉动频率下存在可发生多种不同运动的参数区域。
This paper deals with the stability and parametric resonances of a pinned-pinned pipe conveying pulsating fluid.The amplitude-frequency response curves and the frequency properties of the parametric resonances are analyzed using numerical method.The results obtained show that several motions may occur in the region of combination resonance,including two kinds of quasi-periodic vibrations and combined periodic motion.Since the subharmonic resonance curve of the first mode extends as far as the region of combination resonance,there are some parameter regions in which several motions including the first mode subharmonic vibration,quasi-periodic vibration and combined periodic motion may occur corresponding to the same frequency of the pulsating flow.
出处
《沈阳航空工业学院学报》
2003年第1期1-4,共4页
Journal of Shenyang Institute of Aeronautical Engineering
