Design and testing of a frictionless mechanical inerter device using living-hinges
Design and testing of a frictionless mechanical inerter device using living-hinges
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DOI：
10.1016/j.jfranklin.2019.01.036
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发表时间：
2019-09
期刊：
影响因子：
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通讯作者：
Edward D. A. John;D. Wagg
中科院分区：
文献类型：
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作者：
Edward D. A. John;D. Wagg
本文提出了一种新型的无摩擦机械惯性装置，它用活铰链代替齿轮实现飞轮的运动。该设计是一种枢轴飞轮惯性，部分灵感来自于20世纪60年代首次开发的动态抗共振隔振器（DAVI）概念。与DAVI不同的是，它将表明，枢轴飞轮惯性器具有产生平衡力的优势。此外，活动铰链的使用消除了对惯性器机构中的齿轮或其他摩擦元件的需要。为了证明新概念的实用性，使用聚丙烯铰链制造的小规模活铰链惯性器进行了台式实验。通过估计实验系统参数，可以将实验的传输率结果与数学模型进行比较。这些结果表明，活铰链惯性器提供了至少三个数量级的隔离效果，从不受控制的系统相比，与惯性器添加的最大振幅减少。虽然摩擦被消除了，但活铰链确实引入了额外的阻尼，并且发现这对应于不受控系统的1.2%的等效阻尼比的增加。结果表明，本文所研制的活铰式惯性装置满足了成为实用惯性装置的所有必要条件。此外，由于它在没有机械摩擦或流体流动的情况下运行，它代表了实验惰性技术的新范式。
In this paper a novel type of frictionless mechanical inerter device is presented, where instead of gears, motion of the flywheel is achieved usingliving-hinges. The design is a type ofpivoted flywheel inerterinspired in part by the Dynamic Anti-resonant Vibration Isolator (DAVI) concept, which was first developed in the 1960s. Unlike the DAVI, it will be shown that the pivoted flywheel inerter has the advantage of producing balanced forces. Furthermore the use of living-hinges eliminates the need for gears or other frictional elements in the inerter mechanism. To demonstrate the utility of the new concept, a bench-top experiment was performed using a small-scale living-hinge inerter manufactured using polypropylene hinges. By estimating the experimental system parameters, the transmissibility results from the experiment could be compared to a mathematical model. These results showed that the living-hinge inerter provided an isolation effect of at least three orders of magnitude in terms of the maximum amplitude reduction from the uncontrolled system compared to that with the inerter added. Although friction was eliminated, the living-hinges did introduce additional damping, and this was found to correspond to an increase in the equivalent damping ratio for the uncontrolled system of 1.2%. It is shown that the living-hinge inerter developed in this paper fits all of the essential conditions required to be a practical inerter device. Furthermore, as it operates without mechanical friction, or fluid flow, it represents a new paradigm in experimental inerter technology.