文章基本信息

标题：Vibration reduction and stability analysis of damping rings on nonlinear free-free beam
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作者：Yi-Ren Wang ; Yun-Shuo Chang ; Nguyen Cong Ha 等
期刊名称：Advances in Mechanical Engineering
印刷版ISSN：1687-8140
电子版ISSN：1687-8140
出版年度：2020
卷号：12
期号：12
页码：1-21
DOI：10.1177/1687814020985211
语种：English
出版社：Sage Publications Ltd.
摘要：Two damping rings (DRs) are added on a nonlinear free-free elastic beam to reduce vibrations. This elastic beam with free-free boundary conditions can be used to simulate the high speed aircraft fuselage vibrations. Both isotropic beam and compound beam with double-section are investigated. The beam is subjected to a distributed load with the harmonic wind force. The method of multiple scales ((MOMS) a perturbation technique) is employed to analyze this nonlinear problem in frequency domain. DRs with various locations, masses, spring constants, and damping coefficients are analyzed and the maximum amplitude counter plots (MACPs) are compiled to identify DRs’ combinations for the optimal damping effects. The Floquet theory is used to make the basin of attraction (BOA) charts and analyze the stability of the system. This research can be applied in a wide range of engineering problems, such as rocket structures, high-speed aircrafts, satellites, missiles, etc.
关键词：Damping ring; nolinear vibrations; internal resonance; method of multiple scales