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Structural Engineering and Mechanics   Volume 38, Number 4, May25 2011, pages 429-441
The transient and frequency response analysis using the multi-level system condensation in the large-scaled structural dynamic problem
Sungmin Baek and Maenghyo Cho

Abstract     [Buy Article]
    In large-scale problem, a huge size of computational resources is needed for a reliable solution which represents the detailed description of dynamic behavior. Recently, eigenvalue reduction schemes have been considered as important technique to resolve computational resource problems. In addition, the efforts to advance an efficiency of reduction scheme leads to the development of the multilevel system condensation (MLSC) which is initially based on the two-level condensation scheme (TLCS). This scheme was proposed for approximating the lower eigenmodes which represent the global behavior of the structures through the element-level energy estimation. The MLSC combines the multi-level substructuring scheme with the previous TLCS for enhancement of efficiency which is related to computer memory and computing time. The present study focuses on the implementation of the MLSC on the direct time response analysis and the frequency response analysis of structural dynamic problems. For the transient time response analysis, the MLSC is combined with the Newmark
Key Words
    structural dynamic system; system condensation; reduced system method; transient time integration; sub-structuring scheme; two-level condensation scheme.
Sungmin Baek and Maenghyo Cho: WCU Multiscale Mechanical Design Division, School of Mechanical and Aerospace Engineering, Seoul National University, Seoul, Korea

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