Identification of optimum cable vibration absorbers using fixed-sized-inerter layouts
Identification of optimum cable vibration absorbers using fixed-sized-inerter layouts
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DOI：
10.1016/j.mechmachtheory.2019.06.008
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发表时间：
2019-10
影响因子：
5.2
通讯作者：
Jiannan Luo;J. Macdonald;J. Z. Jiang
中科院分区：
文献类型：
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作者：
Jiannan Luo;J. Macdonald;J. Z. Jiang
斜拉索广泛应用于斜拉桥等土木工程结构中，但由于其固有阻尼较低，常发生大幅振动。最近的研究表明，具有两个或三个元件的基于惯性的减振器可以提供非常大的惯性的显着性能改善。如此大的惯性导致物理实现上的困难。同时，具有更多元件的替代性基于惯性器的布局可能会以显著更小的惯性提供更好的性能。然而，逐一研究这些配置是不切实际的，因为可能的吸收器布局的数量随着元件的数量呈指数级增加。本文针对两种固定尺寸惯性器（FSI）布局形式，提出了一种有效的、系统的最优构型识别方法。一个简化过程也被采用，然后简化所获得的配置，而不损害性能增益。使用这种方法，它示出，当元素的数量从三个增加到四个，可以得到显着的增强，即使与小的惯性值。所提出的方法也可以应用于其他机械结构的振动问题和其他性能指标。
Cables are widely used in cable-stayed bridges and other civil engineering structures, but they often experience large amplitude vibrations due to their low inherent damping. Recent studies have shown that inerter-based vibration absorbers with two or three elements can provide significant performance improvements with very large inertance. Such large inertance leads to difficulties in physical implementation. Meanwhile, alternative inerter-based layouts with more elements could potentially provide better performance with significantly smaller inertance. However, studying these configurations one by one is impractical because the number of possible absorber layouts increases exponentially with the number of elements. This paper, using two types of fixed-sized-inerter (FSI) layouts, presents an efficient and systematic optimum configuration identification methodology. A simplification procedure is also adopted to then simplify the obtained configurations while not compromising the performance gains. Using this approach, it is shown that when the number of elements is increased from three to four, significant enhancement can be obtained even with small inertance values. The proposed approach can also be applied to vibration problems of other mechanical structures and with other performance criteria.