Practical negative stiffness device with viscoelastic damper in parallel or series configuration for cable damping improvement

Chen, Lin; Liu, Zhanhang; Zou, Yiqing; Wang, Meng; Nagarajaiah, Satish; Sun, Fei‐Fei; Sun, Lijun

doi:10.1016/j.jsv.2023.117757

Cited by 14 publications

(2 citation statements)

References 53 publications

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“…Negative stiffness is advantageous [29][30][31][32][33] because it can generate forces in the same direction as the horizontal motion of the isolation layer and reduce the natural frequency of vibration without impacting the bearing capability of the isolator. As a result, technology for base isolation with negative stiffness [34][35][36] has received great attention.…”

Section: Introductionmentioning

confidence: 99%

Developing and Applying a Double Triangular Damping Device with Equivalent Negative Stiffness for Base-Isolated Buildings

Sun,

Peng,

et al. 2023

Buildings

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A passive double triangular damping (DTD) device with equivalent negative stiffness is proposed in this study. The DTD device consists of transmission systems and triangular damping systems. A mechanical model was developed to describe the force–displacement relationship of a triangular damping system, while the feasibility of both the system and model was evaluated using experimental tests. The theoretical analysis demonstrated that DTD was a form of damping with equivalent negative stiffness, and the equivalent expressions were generated. Finally, the prospect of application in the DTD-controlled isolation system was explored using numerical simulation. The results revealed that DTD was more effective than a lead–rubber bearing in reducing isolator displacement and rooftop acceleration when subjected to ground motions.

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Section: Introductionmentioning

confidence: 99%

Developing and Applying a Double Triangular Damping Device with Equivalent Negative Stiffness for Base-Isolated Buildings

Sun,

Peng,

et al. 2023

Buildings

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“…Dong and Cheng [32] conducted an experimental study to investigate the effect of support stiffness on the efficiency of a negative-stiffness damper with linear viscous damping. Chen et al [33] proposed a practical negative-stiffness device for cable damping improvement. When the negative-stiffness damper was combined with a viscoelastic damper in series, high effectiveness was found due to the amplification of deformation amplitudes.…”

Section: Introductionmentioning

confidence: 99%

Optimal Design of Nonlinear Negative-Stiffness Damper with Flexible Support for Mitigating Cable Vibration

Liu,

Zhou,

et al. 2023

Buildings

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Negative-stiffness damper is a promising device to mitigate cable vibrations effectively. In contrast to traditional rigid supports, recent study has found that flexible supports are actually beneficial for enhancing the performance of negative-stiffness dampers. This study extends the understanding of the impact of support flexibility under nonlinear condition, followed by an optimization process to obtain required negative-stiffness dampers and corresponding supports. First, taking damping nonlinearity into account, a unified model is established for the negative-stiffness damper with flexible support. Theoretical equivalent negative stiffness and damping are obtained for a linear case, followed by numerical verification. Thereafter, equivalent parameters under a friction case are presented. Experiments are conducted to validate the analytical derivation. Then, problem formulation is developed for the controlled cable. Optimization process is proposed to determine the required negative-stiffness damper and support for multimodal cable vibration. A series of numerical simulations are performed to demonstrate the design process. Moreover, nonlinear examples are presented to show the potential for improving control performance. As indicated by the research results, a flexible support is capable of amplifying the equivalent negative stiffness and damping under linear and nonlinear conditions. For multimodal cable vibration, it is sufficient to determine the optimized negative stiffness and support by only considering the highest mode. Nonlinear negative-stiffness dampers exhibit superior performance due to the leakage of vibration energy toward high-order modes.

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Bi-directional semi-active tuned mass damper for torsional asymmetric structural seismic response control

Wang

Zhou

Nagarajaiah

et al. 2023

Engineering Structures

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Practical negative stiffness device with viscoelastic damper in parallel or series configuration for cable damping improvement

Cited by 14 publications

References 53 publications

Developing and Applying a Double Triangular Damping Device with Equivalent Negative Stiffness for Base-Isolated Buildings

Developing and Applying a Double Triangular Damping Device with Equivalent Negative Stiffness for Base-Isolated Buildings

Optimal Design of Nonlinear Negative-Stiffness Damper with Flexible Support for Mitigating Cable Vibration

Bi-directional semi-active tuned mass damper for torsional asymmetric structural seismic response control

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