Journal ArticleDOI
Clipped viscous damping with negative stiffness for semi-active cable damping
Felix Weber,C Boston,C Boston +2 more
Reads0
Chats0
TLDR
In this paper, the authors investigated numerically and experimentally clipped viscous damping with negative stiffness for semi-active cable damping and showed that the resulting curvature at the actuator position is larger than the curvature close to the anchors due to the disturbance forces, which may lead to premature cable fatigue at the position.Abstract:
This paper investigates numerically and experimentally clipped viscous damping with negative stiffness for semi-active cable damping. From simulations it is concluded that unclipped and clipped viscous damping with negative stiffness is equivalent to unclipped and clipped LQR. It is shown that optimized unclipped viscous damping with negative stiffness generates critical cable damping by an anti-node at the actuator position. The resulting curvature at the actuator position is larger than the curvature close to the anchors due to the disturbance forces which may lead to premature cable fatigue at the actuator position. Optimized clipped viscous damping with negative stiffness does not show this drawback, can be implemented using a semi-active damper and produces twice as much cable damping as optimal viscous damping. Close to the optimal tuning, it leads to approximately the same control force as optimal semi-active friction damping with negative stiffness, which explains the superior cable damping. The superior damping results from the negative stiffness that increases the damper motion. Clipped viscous damping with negative stiffness is validated on a strand cable with a magneto-rheological damper. The measured cable damping is twice that achieved by emulated viscous damping, which confirms the numerical results. A tuning rule for clipped viscous damping with negative stiffness of real cables with flexural rigidity is given.read more
Citations
More filters
Journal ArticleDOI
Semi-active vibration absorber based on real-time controlled MR damper
TL;DR: In this paper, a semi-active vibration absorber with real-time controlled magnetorheological damper (MR-SVA) is presented for the mitigation of harmonic structural vibrations.
Journal ArticleDOI
Frequency and damping adaptation of a TMD with controlled MR damper
Felix Weber,M. Maślanka +1 more
TL;DR: In this paper, a semi-active tuned mass damper with magnetorheological damper (MR-STMD) is proposed to enhance the force of the passive spring stiffness.
Journal ArticleDOI
Magnetic negative stiffness dampers
Xiang Shi,Songye Zhu +1 more
TL;DR: In this article, the design principle and experimental validation of two novel configurations of magnetic negative stiffness dampers (MNSDs) are presented, both of which are composed of several permanent magnets arranged in a conductive pipe.
Journal ArticleDOI
Cable with discrete negative stiffness device and viscous damper: passive realization and general characteristics
TL;DR: In this article, the negative stiffness is realized passively using a self-contained highly compressed spring, called negative stiffness device (NSD), installed in parallel with a viscous damper in the vicinity of cable anchorage, enabling increment of damper deformation during cable vibrations and hence increasing the attainable cable damping.
Journal ArticleDOI
Dynamic characteristics of stay cables with inerter dampers
Xiang Shi,Xiang Shi,Songye Zhu +2 more
TL;DR: Inerter dampers can offer better damping performance than conventional viscous dampers for the target mode of a stay cable that requires optimization, however, additional damping ratios in other vibration modes through inerter damper are relatively limited.
References
More filters
Journal ArticleDOI
Vibrations of a Taut Cable With an External Damper
TL;DR: In this paper, a solution of the problem of vibrations of a taut cable equipped with a concentrated viscous damper is presented, expressed in terms of damped complex-valued modes, leading to a transcendental equation for the complex eigenfrequencies.
Journal ArticleDOI
Modulated homogeneous friction : A semi-active damping strategy
TL;DR: In this paper, a semi-active friction damper was proposed, where the contact force between the sliding surfaces of the damper is proportional to the absolute value of the prior local peak of the deformation.
Journal ArticleDOI
Semiactive Damping of Stay Cables
TL;DR: The response of a cable with passive, active, and semiactive dampers is studied and the response with a semiactive damper is found to be dramatically reduced compared to the optimal passive linear viscous damper for typical damper configurations, thus demonstrating the potential benefits using a semi Active Damper for absorbing cable vibratory energy.
Journal ArticleDOI
Advances in the development of pseudo-negative-stiffness dampers for seismic response control
TL;DR: Pseudo-negative-stiffness dampers (PNS dampers) as mentioned in this paper are controlled variable dampers that produce negative stiffness hysteretic loops, which are advantageous since dampers are usually set parallel to structure's members.
Journal ArticleDOI
Vibration Control of Stay Cables of the Shandong Binzhou Yellow River Highway Bridge Using Magnetorheological Fluid Dampers
TL;DR: In this paper, an innovative control algorithm for active and semi-active control of mass-distributed dynamic systems, e.g., stay cables, was proposed, where 40 magnetorheological fluid dampers were attached to the 20 longest cables of this bridge to suppress possible vibration.
Related Papers (5)
Free Vibrations of Taut Cable with Attached Damper. I: Linear Viscous Damper
Joseph A. Main,Nicholas P. Jones +1 more