期刊
ACTA MECHANICA SINICA
卷 28, 期 5, 页码 1436-1448出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s10409-012-0100-0
关键词
Nonlinear viscous damping; Force transmissibility; Vibration isolation; Volterra series
资金
- EPSRC (UK)
- National Science Fund for Distinguished Young Scholars [11125209]
- National Natural Science Foundation of China [10902068, 51121063]
- EPSRC [EP/H00453X/1, EP/F017715/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/F017715/1, EP/H00453X/1] Funding Source: researchfish
In the present study, the Volterra series theory is adopted to theoretically investigate the force transmissibility of multiple degrees of freedom (MDOF) structures, in which an isolator with nonlinear anti-symmetric viscous damping is assembled. The results reveal that the anti-symmetric nonlinear viscous damping can significantly reduce the force transmissibility over all resonance regions for MDOF structures with little effect on the transmissibility over non-resonant and isolation regions. The results indicate that the vibration isolators with an anti-symmetric damping characteristic have great potential to solve the dilemma occurring in the design of linear viscously damped vibration isolators where an increase of the damping level reduces the force transmissibility over resonant frequencies but increases the transmissibility over non-resonant frequency regions. This work is an extension of a previous study in which MDOF structures installed on the mount through an isolator with cubic nonlinear damping are considered. The theoretical analysis results are also verified by simulation studies.
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