Research on the Value of Rayleigh Damping Parameter in Explicit and Implicit Integrals for Dynamic Analysis of Large Structures

Yan Chen; Haitao Wang; Yougang Wang; Junhong Zhang; Zitong Bao; Jianbo Li; Miaomiao Chen; Peng Xu

doi:10.3390/buildings14051286

Buildings (May 2024)

Research on the Value of Rayleigh Damping Parameter in Explicit and Implicit Integrals for Dynamic Analysis of Large Structures

Yan Chen,
Haitao Wang,
Yougang Wang,
Junhong Zhang,
Zitong Bao,
Jianbo Li,
Miaomiao Chen,
Peng Xu

Affiliations

Yan Chen: Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
Haitao Wang: Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
Yougang Wang: China National Nuclear Corporation (CNNC), Beijing 100032, China
Junhong Zhang: China National Nuclear Corporation (CNNC), Beijing 100032, China
Zitong Bao: China National Nuclear Corporation (CNNC), Beijing 100032, China
Jianbo Li: State Key Laboratory of Coastal and Offshore Engineering, Institute of Earthquake Engineering, School of Infrastructure Engineering, Dalian University of Technology, Dalian 116024, China
Miaomiao Chen: State Key Laboratory of Coastal and Offshore Engineering, Institute of Earthquake Engineering, School of Infrastructure Engineering, Dalian University of Technology, Dalian 116024, China
Peng Xu: State Key Laboratory of Coastal and Offshore Engineering, Institute of Earthquake Engineering, School of Infrastructure Engineering, Dalian University of Technology, Dalian 116024, China

DOI: https://doi.org/10.3390/buildings14051286
Journal volume & issue: Vol. 14, no. 5
p. 1286

Abstract

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Rayleigh damping is proportional to the combination of the structural mass matrix and stiffness matrix and is widely used in structural seismic analysis. The accuracy of seismic analysis of nuclear power structures directly depends on the value of the Rayleigh damping parameters. However, the stiffness component of Rayleigh damping is not included in the explicit integral, so the Rayleigh damping in the explicit and implicit integrals needs to be handled differently. LS-DYNA R11.1.0 software provides various calculation methods for the value of the Rayleigh damping parameter in the explicit integral. To investigate the influence of the value of the Rayleigh damping parameter in the explicit and implicit integrals on the results of the dynamic analysis of a nuclear power plant, the AP1000 nuclear island plant is taken as an example, and the explicit and implicit dynamic calculation are carried out respectively for the nuclear power plant, considering the soil–structure interaction. The results show that the Rayleigh damping parameter calculated by different methods in the explicit integral has a large influence on the results of seismic analysis of nuclear power plants. The mass component of Rayleigh damping in the explicit and implicit integrals takes the same value, and the stiffness component of Rayleigh damping in the explicit integrals is taken as the negative of the stiffness component in the implicit integrals. Thus, the results of the two dynamic analyses can be in good agreement. The results provide a reference for the application of Rayleigh damping in the explicit integral for the seismic analysis of nuclear power structures.

Published in Buildings

ISSN: 2075-5309 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Building construction
Website: https://www.mdpi.com/journal/buildings

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