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Dynamic interaction numerical models in the time domain based on the high performance scaled boundary finite element method

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Earthquake Engineering and Engineering Vibration 2013年第4期12卷 541-546页

作者： Li Jianbo Liu Jun Lin Gao The State Key Laboratory of Coastal and Offshore Engineering Dalian University of Technology Institute of Earthquake Engineering School of Hydraulic EngineeringDalian University of Technology

Consideration of structure-foundation-soil dynamic interaction is a basic requirement in the evaluation of the seismic safety of nuclear power facilities. An efficient and accurate dynamic interaction numerical model in the time domain has become an important topic of current research. In this study, the scaled boundary finite element method （SBFEM） is improved for use as an effective numerical approach with good application prospects. This method has several advantages, including dimensionality reduction, accuracy of the radial analytical solution, and unlike other boundary element methods, it does not require a fundamental solution. This study focuses on establishing a high performance scaled boundary finite element interaction analysis model in the time domain based on the acceleration unit-impulse response matrix, in which several new solution techniques, such as a dimensionless method to solve the interaction force, are applied to improve the numerical stability of the actual soil parameters and reduce the amount of calculation. Finally, the feasibility of the time domain methods are illustrated by the response of the nuclear power structure and the accuracy of the algorithms are dynamically verified by comparison with the refinement of a large-scale viscoelastic soil model.

关键词： time domain analysis dynamic interaction acceleration impulse response function scaled boundary finiteelement method viscoelastic boundary

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The Analysis and Comparison of All Kinds of Buried Pipeline Model Based on Seismic Effect

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Engineering（科研） 2016年第6期8卷 365-370页

作者： Xiaoli Li Jing Sun Tinghui Li College of Civil and Architecture Engineering Northeast Petroleum University School Daqing China China Electric Power Press LTD Beijing China

The problem of seismic response of buried pipeline aimed at the interaction of soil around the pipeline and the complicated calculation model was considered, and the various simplified finite element model was calculated, and it was analyzed. Firstly, the ADINA finite element analysis software was used. The four nodes in shell unit were used by tube. The spring unit was used by soil spring. The analysis model of buried pipeline finite element numerical based on tension and compression spring was established. Seismic wave was input. The response to the simple boundary, viscoelastic boundary earthquake were calculated and analyzed by the finite element numerical simulation. The pipeline’s earthquake ground motion response was obtained, and was compared with the real soil model, and the most suitable simplified calculation model for numerical analysis of buried pipeline was found, which was the numerical analysis model of buried pipeline pressure spring tension finite element based on the viscoelastic boundary, and the theory basis for the seismic design of pipeline was provided.

关键词： Buried Pipeline viscoelastic boundary Tension and Compression Spring

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