کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
785716 | 1465358 | 2011 | 10 صفحه PDF | دانلود رایگان |

In the present study, the concept of the Output Frequency Response Function (OFRF), recently proposed by the authors, is applied to theoretically investigate the force transmissibility of MDOF structures with a cubic non-linear viscous damping device. The results analytically show that the introduction of cubic non-linear damping can significantly reduce the transmissibility over all resonance regions for a Multiple Degree of Freedom (MDOF) structure and at the same time leave the transmissibility over the isolation region virtually unaffected. The analysis also indicates that a strong linear damping may shift the system resonances and compromise the beneficial effects of cubic non-linear viscous damping on the force transmissibility of MDOF structures. This suggests that a less significant linear damping together with a strong cubic non-linear damping can be used in MDOF structures to achieve a desired vibration isolation performance. This research work has a significant implication for the design of viscously damped MDOF structures for a wide range of practical applications.
► We theoretically investigate the force transmissibility of MDOF structures with a cubic nonlinear viscous damping device.
► Cubic nonlinear damping can significantly reduce the transmissibility over all resonance regions for MDOF structures.
► Cubic nonlinear damping has almost no effect on the transmissibility over the isolation regions.
Journal: International Journal of Non-Linear Mechanics - Volume 46, Issue 10, December 2011, Pages 1305–1314