Theoretical study and experimental verification on a passive control system with isolators and dampers for NPPs

Feng, Yixin; Liu, Wenguang; Xu, Hao; Zhang, Qiang

doi:10.1016/j.jobe.2022.105195

Cited by 2 publications

(2 citation statements)

References 48 publications

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“…The results analysis and test verification showed that the method was reasonable. Feng et al (2022) proposed a hybrid passive control system for nuclear power plant structures (NPPs) with double containments; the vibration characteristics and parametric correlation analysis of proposed systems based on the connected single degree of freedom (CSDOF) model were analyzed, and the optimal damping parameter was obtained. The results show that with optimal parameters, the acceleration and displacement responses of the damped isolated structural system (DISO system) were lower than traditional isolated structures.…”

Section: Introductionmentioning

confidence: 99%

Vibration response analysis of a two-stage vibration isolation system for large airborne equipment

Zhu,

Lv,

et al. 2023

MMMS

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PurposeThis paper aims to propose a two-stage vibration isolation system for large airborne equipment to isolate aircraft vibration load.Design/methodology/approachFirst, the vibration isolation law of the discrete model of large airborne equipment under different damping ratios, stiffness ratios and mass ratios is analyzed, which guides the establishment of a three-dimensional solid model of large airborne equipment. Subsequently, the vibration isolation transfer efficiency is analyzed based on the three-dimensional model of the airborne equipment, and the angular and linear vibration responses of the two-stage vibration isolation system under different frequencies are studied.FindingsFinally, studies have shown that the steady-state angular vibration at the non-resonant frequency changes little. In contrast, the maximum angular vibration at the resonance peak reaches 0.0033 rad, at least 20 times the response at the non-resonant frequency. The linear vibration at the resonant frequency is at least 2.14 times the response at the non-resonant frequency. Obviously, the amplification factor of linear vibration is less than that of angular vibration, and angular vibration has the most significant effect on the internal vibration of airborne equipment.Originality/valueThe two-stage vibration isolation equipment designed in this paper has a positive guiding significance for the vibration isolation design of large airborne equipment.

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Section: Introductionmentioning

confidence: 99%

Vibration response analysis of a two-stage vibration isolation system for large airborne equipment

Zhu,

Lv,

et al. 2023

MMMS

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“…To mitigate the destructive effects of earthquake loads, numerous vibration control systems have been proposed [1][2][3]. These systems can be broadly categorized as passive, active, semi-active, and hybrid [4][5][6]. Among these, passive control systems, such as metallic dampers, offer substantial damping capacity without requiring external energy sources.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of the Effect of Aluminum Yielding Damper for the Retrofitting of Semi-rigid Steel Frames

Aghani,

Cheraghi,

Bakhshipour

2023

Period. Polytech. Civil Eng.

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During an earthquake, yielding dampers yield before the main members of the structure and with their plastic deformations, they dissipate part of the earthquake energy. Therefore, ductile materials are a suitable option for this type of dampers. In this research, numerical studies were conducted to investigate the effect of aluminum yielding damper (AYD) on semi-rigid steel frame. First, the steel frame and the AYD were verified based on experimental samples and analytical equations. An approximate equation for estimating the elastic stiffness of the damper was also presented. Parametric studies were conducted in order to investigate the effect of the number of dampers and the axial force of the column on the stiffness, ultimate strength, ductility and energy dissipation parameters of the frame. The additional forces applied to the connections, beams and columns of the frame due to the addition of dampers were also calculated, which is important in the design of the frame. The results showed that the addition of the damper increased the frame's stiffness, energy dissipation, ultimate strength, and ductility, and also reduced the negative effect of the column's axial force on energy dissipation of the frame.

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Theoretical study and experimental verification on a passive control system with isolators and dampers for NPPs

Cited by 2 publications

References 48 publications

Vibration response analysis of a two-stage vibration isolation system for large airborne equipment

Vibration response analysis of a two-stage vibration isolation system for large airborne equipment

Numerical Investigation of the Effect of Aluminum Yielding Damper for the Retrofitting of Semi-rigid Steel Frames

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