Dynamic characteristics of AP1000 shield building for various water levels and air intakes considering fluid-structure interaction

Zhao, Chunfeng; Chen, Jianyun

doi:10.1016/j.pnucene.2013.08.002

Cited by 27 publications

(7 citation statements)

References 18 publications

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“…In general, the tuned liquid damper (TLD) and the tuned liquid column damper (TLCD) as passive devices are capable of reducing the displacement and acceleration at the top of the structure and have been widely used for structure control. The effectiveness of TLD and TLCD in mitigating the structural vibration in engineering such as the high‐rise steel structure, the nuclear power plant, the bridge, and the jacket offshore platform had been verified. Considering the characteristics of the composite bushing, the metallic dome at the top of the bushing provides a convenience for the design of TLD.…”

Section: Introductionmentioning

confidence: 99%

Sloshing characteristics of annular tuned liquid damper (ATLD) for applications in composite bushings

Yue

Chen

2018

Struct Control Health Monit

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Summary It is of great significance to conduct seismic qualification and mitigation for composite bushing, whose damage may cause massive power outage and huge cost of repair. In this paper, the annular tuned liquid damper (ATLD), utilizing the sloshing characteristics of transformer oil in the dome, is proposed to reduce the seismic responses of the composite bushing. As to the annular feature of the metallic dome, the simplified formulas for calculating the liquid sloshing frequencies in the dome are derived based on the linear wave theory, which provides a direct and fast way for the predesign of ATLD. Comparing with the experimental results reported in literature, the accuracy and applicability of the proposed formulas are verified. In addition, parametric studies of the first 3 sloshing frequencies including liquid height and the outer and the inner radii are carried out. The optimal tuning analysis of vibration reduction in frequency domain is performed on the structure base excitation. The vibration reduction analyses in time domain of the ATLD for the composite bushing subjected to real earthquake records are carried out and discussed simultaneously. It is shown that the simplified formulas presented in this paper provide a convenience for the predesign of ATLD and the optimal ATLD is effective in reducing the vibration of the composite bushing.

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Section: Introductionmentioning

confidence: 99%

Sloshing characteristics of annular tuned liquid damper (ATLD) for applications in composite bushings

Yue

Chen

2018

Struct Control Health Monit

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“…Secondly, the numerical analysis of the 1,100‐kV composite bushing is conducted by the FEM to verify the accuracy of the proposed equivalent mechanical model. In this FEM model, the fluid in the annular cylindrical tank is simulated by FLUID80 element, which has been widely used in the simulation of liquid motion with small amplitude excitation . For comparison, the liquid in the annular cylindrical tank is also simulated by the proposed equivalent mechanical model.…”

Section: Model Developmentmentioning

confidence: 99%

“…Herein, the performance of TLD is mainly concerned. During the dynamic analysis of the structure‐TLD system, the TLD was usually simulated by numerical method or equivalent mechanical model . It is well acknowledged that the equivalent mechanical model proposed by Housner is generally used to simulate the liquid motion in the regular tank with small amplitude excitation.…”

Section: Introductionmentioning

confidence: 99%

Optimal design of multiple annular tuned liquid dampers for seismic reduction of 1,100-kV composite bushing

Yue

Chen

2019

Struct Control Health Monit

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Summary It is of great significance to perform seismic mitigation for the 1,100‐kV composite bushings because they are vulnerable to damage during earthquakes. In this paper, a new design process of multiple tuned liquid dampers (MTLDs), utilizing the displacement transfer function curves and the equivalent mechanical model of annular tuned liquid damper (ATLD), is proposed for seismic reduction of the 1,100‐kV composite bushing. At first, the equivalent mechanical model of ATLD is derived based on the linear wave theory. The effects of the radius ratio and the liquid‐filled depth ratio on the equivalent sloshing mass are discussed. The accuracy of the equivalent mechanical model is also verified by comparing the results with those from the Housner's model and the finite element model. And then, the transfer functions of the structure with MATLD attached are formulated in the frequency domain. The parameters, including the frequency ratio, the mass ratio, and the damping ratio, that influence the transfer function curves are also investigated. Based on these transfer function curves, the new design process of MATLD is presented. Combining with the equivalent mechanical model of ATLD, a dynamic analysis of the bushing equipped with MATLD in the dome is performed under the real earthquake records. It is concluded that the MATLD performs better than the ATLD and the bushing equipped with 5ATLD in the dome is the optimal design for seismic reduction.

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“…It has been shown in the work that the dynamic displacements of the structure decrease considerably by using the high damping rubber bearing isolators. Various aspects of the modal and dynamic analyses of the AP1000 shield building by using the numerical method are presented in the review papers [8,9]. Zhai et al [10] developed a three-dimensional finite element model for the reinforced concrete containment building and employed it to study the dynamic behavior of the building under the mainshock-aftershock earthquake sequences.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Behavior of AP1000 Nuclear Island Building in Japanese Kobe 1995 Earthquake

Nguyen¹,

Vu²,

Gan³

2017

IOSR JMCE

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Dynamic characteristics of AP1000 shield building for various water levels and air intakes considering fluid-structure interaction

Cited by 27 publications

References 18 publications

Sloshing characteristics of annular tuned liquid damper (ATLD) for applications in composite bushings

Sloshing characteristics of annular tuned liquid damper (ATLD) for applications in composite bushings

Optimal design of multiple annular tuned liquid dampers for seismic reduction of 1,100-kV composite bushing

Dynamic Behavior of AP1000 Nuclear Island Building in Japanese Kobe 1995 Earthquake

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