Abstract This paper presents improved inerter-based absorbers for vibration mitigation of structural systems. The driving and innovative concept is to include a standard inerter-based device within a rhombus truss; specifically, the inerter-based device is connected to the two ends of one rhombus diagonal and activated by the motion of the structural system along the other diagonal. It is shown that, in this manner, a significant amplification of the inertance can be attained, depending on the diagonal ratio of the rhombus truss. The concept is presented for three typical inerter-based absorbers existing in the literature. The performances of the improved inerter-based devices are investigated and compared thoroughly, as applied to single-degree-of-freedom systems. The optimal tuning is implemented following a well-established procedure, entirely analytical, which makes the design of the proposed improved inerter-based devices very straightforward. A further novelty, particularly appealing for design purposes, is that the improved inerter-based absorbers can be re-tuned over a certain frequency range by changing only the geometry of the rhombus truss, with considerable benefits in those cases where the structural system parameters may vary during the operational lifetime. For completeness, an application to a multi-degree-of-freedom system substantiates the effectiveness of the proposed concept.

中文翻译：

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改进的基于惰性物质的减振器

摘要 本文介绍了用于结构系统减振的改进型惰性减振器。驱动和创新概念是在菱形桁架中包含一个标准的基于惰性的设备；具体地，基于惰性的装置连接到一个菱形对角线的两端，并由结构系统沿另一对角线的运动激活。结果表明，以这种方式，根据菱形桁架的对角线比例，可以实现惯性的显着放大。该概念针对文献中存在的三种典型的基于惰性物质的吸收剂提出。对改进的基于惰性的装置的性能进行了彻底的研究和比较，适用于单自由度系统。最佳调整是按照完善的程序实施的，完全分析，这使得所提出的改进的基于惰性的设备的设计非常简单。另一个对设计目的特别有吸引力的新颖之处在于改进的基于惰性物质的吸波器可以通过仅改变菱形桁架的几何形状在特定频率范围内重新调谐，在结构系统参数可能会改变的情况下具有相当大的好处在使用寿命期间变化。为了完整性，多自由度系统的应用证实了所提议概念的有效性。改进的基于惰性材料的吸收器可以通过仅改变菱形桁架的几何形状在特定频率范围内重新调谐，这在结构系统参数在使用寿命期间可能发生变化的情况下具有相当大的好处。为了完整性，多自由度系统的应用证实了所提议概念的有效性。改进的基于惰性材料的吸收器可以通过仅改变菱形桁架的几何形状在特定频率范围内重新调谐，这在结构系统参数在使用寿命期间可能发生变化的情况下具有相当大的好处。为了完整性，多自由度系统的应用证实了所提议概念的有效性。