Ning Su , Jing Bian , Zhihe Zhang , Cong Zeng , Zhaoqing Chen , Yi Xia
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引用次数: 0
Abstract
To mitigate hazardous vibrations on slender tower structures, a Negative-stiffness Inerter-based Outrigger-Cable-Lever-Damping (NIOCLD) system is proposed. The NIOCLD is composed of an outrigger, a lever, a pair of cables and negative-stiffness inerter-based (NI) dampers. The vibration-induced bending rotation of the primary tower is firstly converted into vertical direction by the outrigger. Transmitted by the cables, amplified by the lever, and finally, the vibration is dissipated by the NI dampers. The optimal parameters of the NIOCLD system were analytically derived based on H-norm, damping enhancement, and pole-based optimization approaches. The parametric values, applicable scopes, dynamic and static performances of these solutions are systematically compared to provide insights for the practical design. Finally, the effectiveness was validated by a practical steel-concrete hybrid wind turbine tower against seismic and wind hazards. As the NIOCLD adopts the negative-stiffness and inerter elements, it exhibits superior energy dissipation performance compared to the Inerter-based Outrigger-Cable-Lever-Damping (IOCLD) system without negative-stiffness, and amplifying damping transfer system (ADTS) without negative-stiffness or inerter. The proposed NIOCLD can dissipate more energy proportion, produce larger damping force with less stroke. Due to the high-performance and practical feasibility, the NIOCLD is especially suitable for vibration control of slender tower structures.
期刊介绍：
The International Journal of Mechanical Sciences (IJMS) serves as a global platform for the publication and dissemination of original research that contributes to a deeper scientific understanding of the fundamental disciplines within mechanical, civil, and material engineering.
The primary focus of IJMS is to showcase innovative and ground-breaking work that utilizes analytical and computational modeling techniques, such as Finite Element Method (FEM), Boundary Element Method (BEM), and mesh-free methods, among others. These modeling methods are applied to diverse fields including rigid-body mechanics (e.g., dynamics, vibration, stability), structural mechanics, metal forming, advanced materials (e.g., metals, composites, cellular, smart) behavior and applications, impact mechanics, strain localization, and other nonlinear effects (e.g., large deflections, plasticity, fracture).
Additionally, IJMS covers the realms of fluid mechanics (both external and internal flows), tribology, thermodynamics, and materials processing. These subjects collectively form the core of the journal's content.
In summary, IJMS provides a prestigious platform for researchers to present their original contributions, shedding light on analytical and computational modeling methods in various areas of mechanical engineering, as well as exploring the behavior and application of advanced materials, fluid mechanics, thermodynamics, and materials processing.
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