期刊
APPLIED SCIENCES-BASEL
卷 12, 期 8, 页码 -出版社
MDPI
DOI: 10.3390/app12084028
关键词
ball-screw inerter; alterable inerter; adaptive inertance; CVT ratio; vibration reduction
类别
资金
- National Natural Science Foundation of China [52078293, 51908352]
- Science Research Plan of Shanghai Municipal Science and Technology Committee [18DZ1205603, 20dz1201301]
This paper proposes an inerter-based device for structural vibration control that can alter inertance based on frequency changes. The device, called an adaptive tuned mass inertance damper (ATMID), utilizes a continuously variable transmission system and a ball-screw inerter. The ATMID is able to produce alterable inertance, allowing for seamless variability in device frequency and efficient oscillation suppression.
In this paper, an inerter-based device for structural vibration control is proposed with which inertance can be altered relying on the frequency changes of the excitation. In this manner, a tuned mass damper is developed in such a way that it is assembled with a ball-screw inerter along with a new continuously variable transmission system. The device is termed an adaptive tuned mass inertance damper (ATMID). The ATMID is able to produce an alterable inertance, which gives rise to seamless variability in device frequency; consequently, the device frequency can be tuned to that of the excitation. To assess the efficiency of the device, the response amplitude of a single-degree-of-freedom harmonically induced structure controlled by the ATMID is compared with those of the passive-controlled and uncontrolled structures. Results show that in the frequency band where the effectiveness of the passive device with a mass ratio of 0.2 is degraded and even destructed, the adaptive device with a mass ratio of 0.1 and diverse inertance behaves impressively. As a result, notable oscillation suppression is obtained using the proposed adaptive device compared with passive-controlled (56%) and uncontrolled cases (21%). The presented extensive variability in the frequency of the device utilizing its transmission ratio of 0.45-2.2 leads the device to a superior level of oscillatory motion reduction in structural responses along an enlarged frequency band.
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