准零刚度隔振器对多跨输流管道隔振性能分析  

Nalysis of Vibration Isolation Performance of Quasi-zero Stiffness Isolator for Multi-Span Pipes Conveying Fluid

作　　者：张文轩 唐冶 ZHANG Wenxuan;TANG Ye(School of Mechanical Engineering,Anhui Polytechnic University,Wuhu 241000,China;Department of Mechanics,Tianjin University,Tianjin 300350,China)

机构地区：[1]安徽工程大学机械工程学院,安徽芜湖241000 [2]天津大学力学系,天津300350

出　　处：《东莞理工学院学报》2024年第5期97-102,109,共7页Journal of Dongguan University of Technology

基　　金：国家自然科学基金项目(11902001)。

摘　　要：输流管道在低频激励的振动下会引起疲劳、失效等结构损伤,为克服线性粘弹性隔振器隔振频带与承载能力之间的限制。采用阻尼和弹簧构造非线性准零刚度隔振器,控制多跨输流管道的振动,以实现低频隔振。用哈密顿变分原理建立多跨输流管道在有无隔振器情况下的偏微分方程,通过伽辽金法和龙格-库塔法进行求解。分析了准零刚度隔振器对输送流体管道多模态振动的影响,使用绝对运动传递率来评估隔振器的性能,并与线性粘弹性隔振器进行比较。结果表明准零刚度和线性粘弹性隔振器对多跨输流管道在高频区域内都具有良好的性能,但在低频区域内前者隔振性能更好。该装置可应用于长距离连续多跨输流管道的隔振。Under low-frequency excitations,vibration of pipes conveying fluid can lead to fatigue and structural damage.To overcome limitations arising from the frequency band and load capacity of linear viscoelastic isolators,a solution involving non-linear quasi-zero-stiffness isolators constructed with damping and springs is proposed.These isolators aim to control the vibrations of multi-span pipes conveying fluid,particularly focusing on low-frequency isolation.The Hamiltonian variational principle is employed to establish partial differential equations for multi-span pipelines with and without isolators.The Galerkin method and the Runge-Kutta method are applied for numerical solutions.An analysis of the impact of quasi-zero-stiffness isolators on the multi-mode vibrations of fluid-conveying pipelines is conducted.The performance of the isolators is assessed using the absolute motion transmissibility and compared with linear viscoelastic isolators.Results indicate that both quasi-zero-stiffness and linear viscoelastic isolators exhibit favorable performance in the high-frequency region for multi-span fluid conveying pipelines.But in the low-frequency range,the former exhibits superior isolation performance.The device can be applied to the vibration isolation of long-distance continuous multi-span transmission pipelines.

关 键 词：准零刚度 多跨 低频隔振 输流管道 

分 类 号：TB535.1[理学—物理]