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Bowstring-type inerter negative stiffness damper for vibration control of slender towers
Abstract The difficulty of practical installation restrains the application of tuned damping devices in the high-performance vibration control of slender towers. In order to address this issue, a novel Bowstring-type Inerter Negative Stiffness Damper (BINSD) is proposed. The BINSD is composed of an inerter-negative-stiffness-dashpot system connected between the tower and a mass block (or a massless node) located on a vertical prestressed cable like a bowstring. In order to determine the multiple optimal parameters of the proposed BINSD, analytical parametric optimizations are investigated for the following three aspects. Firstly, the optimal tuning frequency and damping ratios are obtained via an analytical approach considering H ∞ and H 2 norms. Secondly, the optimal negative stiffness is determined by balancing the static and dynamic performances, particularly for practical excitations with mixed static and dynamic components (such as wind). Thirdly, the optimal installation height is analytically derived to fulfil a least negative stiffness criterion, which leads to an economic realization in practice. Finally, the effectiveness of the presented BINSD and corresponding optimal design approaches is numerically validated by the wind- and seismic- induced vibration control cases of a wind turbine tower. The proposed optimal design approaches lead to a high-performance, economic, and feasible design of BINSD.
Highlights Bowstring-type Inerter Negative Stiffness Damper (BINSD) is proposed for slender towers. BINSD is practically feasible to be installed on slender towers. Optimal design formulas and criteria for BINSD are presented. Optimal installation height is derived for least practical negative stiffness. Optimal negative stiffness is determined balancing static and dynamic performances.
Bowstring-type inerter negative stiffness damper for vibration control of slender towers
Abstract The difficulty of practical installation restrains the application of tuned damping devices in the high-performance vibration control of slender towers. In order to address this issue, a novel Bowstring-type Inerter Negative Stiffness Damper (BINSD) is proposed. The BINSD is composed of an inerter-negative-stiffness-dashpot system connected between the tower and a mass block (or a massless node) located on a vertical prestressed cable like a bowstring. In order to determine the multiple optimal parameters of the proposed BINSD, analytical parametric optimizations are investigated for the following three aspects. Firstly, the optimal tuning frequency and damping ratios are obtained via an analytical approach considering H ∞ and H 2 norms. Secondly, the optimal negative stiffness is determined by balancing the static and dynamic performances, particularly for practical excitations with mixed static and dynamic components (such as wind). Thirdly, the optimal installation height is analytically derived to fulfil a least negative stiffness criterion, which leads to an economic realization in practice. Finally, the effectiveness of the presented BINSD and corresponding optimal design approaches is numerically validated by the wind- and seismic- induced vibration control cases of a wind turbine tower. The proposed optimal design approaches lead to a high-performance, economic, and feasible design of BINSD.
Highlights Bowstring-type Inerter Negative Stiffness Damper (BINSD) is proposed for slender towers. BINSD is practically feasible to be installed on slender towers. Optimal design formulas and criteria for BINSD are presented. Optimal installation height is derived for least practical negative stiffness. Optimal negative stiffness is determined balancing static and dynamic performances.
Bowstring-type inerter negative stiffness damper for vibration control of slender towers
Su, Ning (Autor:in) / Bian, Jing (Autor:in) / Chen, Zhaoqing (Autor:in) / Xia, Yi (Autor:in)
Engineering Structures ; 308
08.04.2024
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Bow string type inerter negative stiffness damper for vibration control of high-rise structure
| Europäisches Patentamt | 2024
| Wiley | 2020