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논문 기본 정보

자료유형
학술저널
저자정보
Lu, Shan (School of Hydraulic Engineering, Faculty of Infrastructure Engineering, Dalian University of Technology) Liu, Jun (School of Hydraulic Engineering, Faculty of Infrastructure Engineering, Dalian University of Technology) Lin, Gao (School of Hydraulic Engineering, Faculty of Infrastructure Engineering, Dalian University of Technology) Wang, Wenyuan (School of Hydraulic Engineering, Faculty of Infrastructure Engineering, Dalian University of Technology)
저널정보
테크노프레스 Structural engineering and mechanics : An international journal Structural engineering and mechanics : An international journal 제55권 제5호
발행연도
2015.1
수록면
1,055 - 1,086 (32page)

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The dynamic response of two-dimensional unbounded domain on the rigid bedrock in the time domain is numerically obtained. It is realized by the modified scaled boundary finite element method (SBFEM) in which the original scaling center is replaced by a scaling line. The formulation bases on expanding dynamic stiffness by using the continued fraction approach. The solution converges rapidly over the whole time range along with the order of the continued fraction increases. In addition, the method is suitable for large scale systems. The numerical method is employed which is a combination of the time domain SBFEM for far field and the finite element method used for near field. By using the continued fraction solution and introducing auxiliary variables, the equation of motion of unbounded domain is built. Applying the spectral shifting technique, the virtual modes of motion equation are eliminated. Standard procedure in structural dynamic is directly applicable for time domain problem. Since the coefficient matrixes of equation are banded and symmetric, the equation can be solved efficiently by using the direct time domain integration method. Numerical examples demonstrate the increased robustness, accuracy and superiority of the proposed method. The suitability of proposed method for time domain simulations of complex systems is also demonstrated.

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