Effects of Fasteners Damping on Dynamical Characteristics of Track Structure
Track structure is modelled as an Euler beam that is supported by a series of discrete points.Further,the governing equations of the track structure subjected to moving harmonic excitation are established.On the basis of the dynamical characteristics and principle of superposition in frequency domain of periodic structure subjected to moving harmonic excitation,for any point,theoretical expression of the amplitude-frequency response is derived.Consequently,the nature characteristic and the effects of fasteners damping on dynamical characteristics of track structure subjected to moving harmonic excitation are investigated.The researches reveal that influences of damping on resonant peak bandwidth and peak value of the track structure are no obvious.While the effects of damping on dynamic response are very obvious on non-resonant high frequency band,and with the increasing of damping the dynamical responses of the track structure obviously decrease.The dynamic characteristics of the fastener bearing points and the midpoint on track structure are almost similarity,while there is a certain difference only in the frequency range far away from the excitation frequency.
Yan-qi Liu Chun-fang Song Yan Zhang Longlong Xu Min Yang Jing Zhang
Beijing Key Laboratory of Environment Noise and Vibration,Beijing Municipal Institute of Labor Prote School of Mechanical Engineering,Jiangnan University,Wuxi,China
国际会议
上海
英文
1-6
2018-12-17（万方平台首次上网日期，不代表论文的发表时间）