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The MR damper mechanical properties and the damping effect of

Author: LiChunYang
Tutor: YangMengGang
School: Central South University
Course: Civil Engineering
Keywords: MR damper mechanical model parameter identification simulation analysis seismic reduction testine
CLC: TB535.1
Type: Master's thesis
Year: 2011
Downloads: 20
Quote: 0
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Abstract


As a kind of seismic reduction measure, the MR damper has excellent characteristics with large output, low energy consumption, adjustable range, temperature adaptability, fast response and so on. The MR damper can effectively reduce the seismic response. In this paper, the mechanical properties and the damping effect of MR damper are investigated, and the main research contents are as follows:(1) Based on the results of RD-1097 type MR damper mechanical test, the force-velocity and force-displacement curves are obtained under different currents, different frequencies and different amplitudes. According to the nonlinear least squares method, the parameter identification for several common mechanical models of MR damper is conducted by the compiled program with the MATLAB software.(2) A novel mechanical model of MR damper is proposed in this paper. The model has some advantages such as fewer parameters, more clear physical concept and ease to procedure. Then the parameters of the proposed model are identified. Compared with test curves, the root mean square errors of predicted curves by the proposed model are lower than those by other mechanical models, which shows that the proposed model has higher accuracy.(3) Taking Pingsheng Bridge in Foshan, a self-anchored suspension bridge as the engineering background, the SDOF model of seismic response reduction is established to simulate the longitudinal floating vibration of the bridge. Furthermore the seismic response reduction experiment with MR damper is developed and the effect of seismic response reduction is verified by MR damper.(4) A program on seismic response reduction with MR damper is compiled. Then the comparisons between the experimental data and the simulated curves under the Pingsheng Bridge seismic wave, the Taft wave and the El-Centro wave are investigated. The results verify that the proposed mechanics model of MR damper in this paper is efficient and the program is reliable.

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CLC: > Industrial Technology > General industrial technology > Acoustic engineering > Vibration, noise and its control > Vibration and noise control and its use > Vibration isolation, damping materials and structures
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