TY - GEN
T1 - Fast dynamic solver for the design of bridge using a model order reduction
AU - Asai, Mitsuteru
AU - Iida, Hiroki
AU - Amin, Norliyati M.
AU - Sonoda, Yoshimi
PY - 2011
Y1 - 2011
N2 - A model order reduction via Krylov subspace has been utilized as a booster of the finite element analysis in this paper. In the seismic design of structures, low frequency responses up to about 20Hz should be accurately predicted. A stepwise iterative frequency response analysis is utilized to evaluate an effective reduced order to maintain the accuracy at the target frequency range. In the frequency analysis, simple error estimation is performed to check the comparison is supported by the Moment Matching (MM), which is one of the important approximation properties of the KS-MOR. In the numerical example, a 3D bridge model with different bearing system was solved to show performance of KS-MOR. One of the bearing system is classical steel hinge, the other is steel laminated rubber bearing. The KS-MOR can apply to the general dynamic structure analysis including the damping matri. The efficiency in the CPU time is about 20-30 times faster than the conventional FEM calculation.
AB - A model order reduction via Krylov subspace has been utilized as a booster of the finite element analysis in this paper. In the seismic design of structures, low frequency responses up to about 20Hz should be accurately predicted. A stepwise iterative frequency response analysis is utilized to evaluate an effective reduced order to maintain the accuracy at the target frequency range. In the frequency analysis, simple error estimation is performed to check the comparison is supported by the Moment Matching (MM), which is one of the important approximation properties of the KS-MOR. In the numerical example, a 3D bridge model with different bearing system was solved to show performance of KS-MOR. One of the bearing system is classical steel hinge, the other is steel laminated rubber bearing. The KS-MOR can apply to the general dynamic structure analysis including the damping matri. The efficiency in the CPU time is about 20-30 times faster than the conventional FEM calculation.
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M3 - Conference contribution
AN - SCOPUS:84861072027
SN - 9789810895297
T3 - Proceedings of the 9th International Conference on Shock and Impact Loads on Structures
SP - 225
EP - 234
BT - Proceedings of the 9th International Conference on Shock and Impact Loads on Structures
T2 - 9th International Conference on Shock and Impact Loads on Structures
Y2 - 16 November 2011 through 18 November 2011
ER -