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The giant - sub controlled structural system of wind-induced vibration response of semi- active control of

Author: XieXiao
Tutor: ZhangZuoAn
School: Northwestern Polytechnical University
Course: Engineering Mechanics
Keywords: Mega - sub controlled structural system Wind-induced response Semi-active control Magnetorheological damper
CLC: TU352.1
Type: Master's thesis
Year: 2006
Downloads: 72
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Abstract


Mega - sub controlled structural system by mega-frame structure and the structure of passive control principle, combined with the structure of a new high-rise building structure, the performance of its force, vibration failure mechanism, mechanical analysis and structural complexity of the design is far higher the ordinary high-rise structure. Task Force optimization of the structure parameters, the mechanical properties of vertical seismic and fluctuating wind loads and wind-induced response of active and hybrid control a series of studies. On the basis of this study, further analysis of the mechanical properties of this new structural system for the first time the use of semi-active control theory and its magnetorheological damper control device a study on wind-induced vibration control of the mega - sub controlled structural system . Mechanical properties of the mega - sub controlled structural system, the quality of the layer model of the structural system, damping, lateral stiffness matrix system parameters such as assembly, structural system under fluctuating wind load excitation vibration control equation: According to the sample simulation of multi-dimensional stochastic process theory, using the the trigonometric weighting method to simulate the mega - sub controlled structural system in the case of two different force fluctuating wind load; based on the research results at home and abroad in the study of magnetic current mechanical characteristics of the ER fluid based on the study of the structure and how it works and damping force characteristics of magnetorheological damper, designed for the needs of the project magnetorheological damper parameters; Finally, numerical analysis, systematic study magnetic Damper on the mega - sub controlled structure subjected to wind-induced response characteristics of the semi-active control, a comparative analysis of control LQR algorithm to determine the optimal control parameters O and R selection and control means changes in the location of the control effect the impact. The example shows that: relative to the non-control-like concept, the displacement response of the semi-active control of structural systems and acceleration responses were significantly reduced, the main structure of the top floor displacement and acceleration control damping rate VAR 27.2% and 57.72%, respectively, VAR of the second sub-structure and three sub-structure of the top-level acceleration control damping rate of 49.84% and 58.31%, respectively; the magnetorheological damper set at the top of the sub-structure of the structural system of control would be better. The research results show that the use of magneto-rheological dampers have good control effect on the mega - sub controlled structural system of wind-induced vibration response of the semi-active control, can simultaneously control the displacement response of the structural system response and acceleration.

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CLC: > Industrial Technology > Building Science > Building structure > Special Structure > Anti - shock structure,disaster prevention structures > Shock, isolation, and explosion-proof structure
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