Experimental and theoretical study of a lead extrusion and friction composite damper

Yan, Xueyuan; Zaixian, Chen; Ai, Qi; Wang, Xuan; Shi, Shen

doi:10.1016/j.engstruct.2018.09.080

Cited by 18 publications

(4 citation statements)

References 21 publications

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“…In lead-based dampers, severe lead deformation during loading is analyzed, and the dissipated energy is computed using device specific material properties in ABAQUS for lead extrusion and friction composite damper (Yan et al 2018), infilled-pipe damper (Maleki and Mahjoubi 2014), and lead-core base isolators (Habieb et al 2019) via 3D modeling. A two-dimensional (2D) axisymmetric approach is considered for capturing the hysteretic behavior of lead in telescopic lead yield dampers (TLYDs) (Eskandari and Najafabadiab 2018), where adaptive Lagrangian-Eulerian (ALE) meshing formulations are applied to mitigate severe mesh distortions and realistic simulations.…”

Section: Finite-element Modelingmentioning

confidence: 99%

Nonlinear Finite-Element Modeling of HF2V Lead Extrusion Damping Devices: Generic Design Tool

2022

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Supplemental energy-dissipation devices are increasingly used to protect structures, limiting loads transferred to structures and absorbing significant response energy without sacrificial structural damage. The displacement of the bulged shaft plastically deforms lead in the high force to volume (HF2V) device, dissipating significant energy. HF2V devices are currently designed using limited precision models, so there is variability in force prediction. Further, although the outcome force is predicted, the knowledge of the exact internal mechanisms resulting in these device forces is lacking, limiting insight and predictive accuracy in device design. This study develops a generic finiteelement (FEM) model using commercially available software to better understand force generation and aid in precision device design, thus speeding up the overall design and implementation process for uptake and use. The model is applied to 17 experimental HF2V devices of various sizes. The highly nonlinear analysis is run using the software with automatic increments to balance higher accuracy and computational time. The total force output is sum of the friction forces between lead and steel and the contact pressure forces acting between moving shaft and displaced lead. FEM forces and plots of the 17 devices are compared with experimental device forces and test plots. The errors from force comparison for all 17 devices range from −8% (overprediction) to þ39% (underprediction) with a mean absolute error of 7.6% and a signed average error of 4.7%, indicating most errors were small. In particular, the standard error (SE) in manufacturing is SE ¼ AE14%. Overall, 13 of 17 devices (76%) are within AE1 SE of 14%; 3 of 17 devices (18%) are within AE2 SE (AE28%), and the last has −39% error, which is within AE3 SE ¼ AE42%. These results show low errors and a distribution of errors compared with experimental results that are within experimental device construction variability. The overall modeling methodology is objective and repeatable, and thus generalizable. The results validate the overall approach with relatively very low error, providing a general modeling methodology for accurate design of HF2V devices.

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Section: Finite-element Modelingmentioning

confidence: 99%

Nonlinear Finite-Element Modeling of HF2V Lead Extrusion Damping Devices: Generic Design Tool

2022

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“…Passive control does not require an external power source, which includes vibration isolation, vibration absorption, energy dissipation, and vibration damping control measures [6,7]. Over the past decades, a wide variety of energy dissipation and damping devices have been developed, including metal dampers [8], friction dampers [9,10], lead dampers [11,12], viscoelastic dampers [13], and fluid viscous dampers [14]. e fluid viscous damper was a velocity-dependent damping device.…”

Section: Introductionmentioning

confidence: 99%

Theoretical and Experimental Analysis of a Winding Rope Fluid Viscous Damper

Zhang

et al. 2023

Structural Control and Health Monitoring

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This paper investigated a winding rope fluid viscous damper (WRFVD) that uses the frictional amplification mechanism of a winding rope to obtain the operating characteristics of a viscous damper-like device. The WRFVD combined the advantages of fluid viscous dampers and friction dampers. It not only retained the mechanical characteristics of the fluid viscous damper but also reduced manufacturing costs. First, the construction and working principles of the WRFVD were introduced. A theoretical model that could accurately simulate the hysteretic characteristics of the damper was derived. Then, a series of dynamic tests were performed on six prototypes of the WRFVD. The dynamic performance under different displacement amplitudes and device parameters was analyzed based on the test results. In addition, the theoretical model was validated by experimental results. Finally, a series of parametric analyses of the WRFVD were performed. The experimental results showed that the WRFVD is a type of velocity-dependent damper with smooth and plump hysteretic curves under sinusoidal displacement excitation. Fatigue loading tests showed that the WRFVD had excellent fatigue resistance capacity and stable operational performance. The established theoretical model was reasonable and satisfactorily reproduced the hysteretic properties of the WRFVD. The parametric analyses showed that it was not recommended to improve the performance of the WRFVD by the method of adjusting the damping coefficient and pretightening load. It was reasonable to adjust the performance of the WRFVD by setting a smaller velocity exponent, an appropriate winding turn of winding ropes, and a suitable friction coefficient.

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“…M1 and M4 were characterized by similar static and dynamic friction coefficients; the ratio between them was approximately equal to 1. Yan et al invented an innovative lead extrusion and friction composite damper (LEFCD), and both theoretical analysis and experimental investigations of the LEFCDs were conducted [15]. The results indicated that the LEFCDs possess an excellent energy dissipating capacity and can provide a variety of mechanical behaviors with different LEFCD parameters.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Theoretical Analyses of Friction-Oval Section Mild Steel Rod Composite Dampers

Yan,

Yang,

Guo

et al. 2023

Buildings

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In order to improve the seismic and energy dissipation capacity of the whole structure, a friction-oval section mild steel rod composite damper (FOSRCD) was proposed, and its working principle was clarified. The finite element analysis of FOSRCD was carried out, and the effects of friction, frequency and displacement on the damper performance were studied. Considering the structural characteristics of FOSRCD and the mechanical models of friction dampers and mild steel rod dampers, the restoring force model of the composite dampers was proposed and compared with the numerical simulation results. The results showed that the FOSRCDs had good performance and could provide stable energy dissipation capacities in both directions, with the energy dissipation coefficient exceeding 2.3 and the equivalent damping ratio exceeding 0.37. The theoretical analysis results were in good agreement with the numerical simulation results, which verified the theoretical restoring force model; the FOSRCDs make full use of the friction energy dissipation and the shear and bending energy dissipations of the mild steel rod. It enables the two dampers to work together to achieve the purpose of multi-stage energy dissipation. FOSRCD’s structure allows it to dissipate energy in both the X- and Y-directions. The composite dampers have a variety of restoring force models and can be utilized in a wide range of practical applications.

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Experimental and theoretical study of a lead extrusion and friction composite damper

Cited by 18 publications

References 21 publications

Nonlinear Finite-Element Modeling of HF2V Lead Extrusion Damping Devices: Generic Design Tool

Nonlinear Finite-Element Modeling of HF2V Lead Extrusion Damping Devices: Generic Design Tool

Theoretical and Experimental Analysis of a Winding Rope Fluid Viscous Damper

Numerical and Theoretical Analyses of Friction-Oval Section Mild Steel Rod Composite Dampers

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