Optimization method for the placements and parameters of displacement-based dampers using artificial fish swarm algorithm

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (10) : 66-72.

YAN Wei-ming ,GAO Xiao-long ,XIE Zhi-qiang,PENG Lingyun

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Abstract

In an energy dissipation structure, the seismic mitigation effect of the dampers is depended on the parameters and placements. An optimized model, which is based on artificial fish swarm algorithm, is proposed for the optimal design of displacement-based dampers. This model can be applied to the finite element model structure with multi dimensions and degrees of freedom to determinate the placements and parameters of displacement-based dampers in each story. In order to deal with the increment of story shear force after installing displacement-based dampers, an optimized objective function is proposed, in which the variation of maximum story-drift angle, story acceleration and story shear force is considered, and simultaneously, using the form of root mean square (rms) to reflect the vibration properties of each responses in the process of earthquake wave more effectively. In the optimized designing process of the energy dissipation structure, the weighting coefficients of the objective function can be flexibly adjusted according to the design demands. At the end of this paper, some examples are illustrated to verify the effectiveness of the new mathematic model.

Key words

dissipative structure / displacement-based dampers / fish swarm algorithm / placement of damper / parameter of damper

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YAN Wei-ming,GAO Xiao-long,XIE Zhi-qiang，PENG Lingyun. Optimization method for the placements and parameters of displacement-based dampers using artificial fish swarm algorithm[J]. Journal of Vibration and Shock, 2016, 35(10): 66-72

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