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Optimal Design of Dynamic Disaster Active Control on Spatial Span Structures

Author: DongYuan
Tutor: WangSheLiang
School: Xi'an University of Architecture and Technology
Course: Disaster Prevention and Reduction Engineering and Protective Engineering
Keywords: Giant magnetostrictive material Actuator Genetic Algorithms Span Spatial Structures Active Control
CLC: TU352.1
Type: Master's thesis
Year: 2010
Downloads: 72
Quote: 1
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Abstract


With the continuous progress of science and technology and the rapid development of the economy, the span space structure, elegant architectural styling and powerful across its novel structure, research and engineering application at home and abroad has become increasingly widely, and has been the rapid development. The span of the building is increasing, height increasing, and increasingly complex structure, designed according to the traditional methods of civil engineering structures under dynamic loads such as strong earthquakes and strong winds, it is difficult to avoid structural damage or destruction. Structural vibration active control the use of smart materials drive is installed in the appropriate parts of civil engineering structures, can effectively reduce the structural dynamic response and damage accumulation under the dynamic action of the vehicle, waves, wind, earthquakes, etc., to improve the structure of disaster properties. Giant magnetostrictive material (Giant Magnetostrictive Material, referred to as GMM) as the core components discussed GMM actuator works and optimize the design method developed can be applied to the structure of the active vibration control of a GMM actuator and optimized arrangement of the main structure analysis by computer simulation, and validation of the optimized active control effect. Its main work is as follows: (1) study the deformation mechanism and the magnetron characteristics of the GMM, on this basis, design and produce a better performance of GMM actuator, while this actuator magnetics performance tests, analyze the relationship between output displacement, output force and drive current, high magnetic sleeve factors such as the performance of the actuator, and summarize the main law, which provides the basis for follow-up research and application . (2) active seismic control on a flat grid structure genetic algorithm-based optimization method to optimize the design layout of the actuator position, using MATLAB program of fitness function and application GADS toolbox optimized computing improve the computational efficiency of the optimization design, can guarantee to achieve overall optimization of the structure, to avoid falling into local optimization, achieving a highly active seismic control for the purpose of economy of the structure. (3) In order to test the validity of the optimization method and GMM actuator on the validity and applicability of seismic control applications in MATLAB SIMULINK toolbox of flat grid structure was active seismic control power process analysis. Structure compared to control effects in a variety of different conditions, to verify the effectiveness of the application of genetic algorithms to optimize the position of the actuator arrangement. The results showed that the application of GMM actuator seismic active control is feasible, the general effect of structural displacement control up to 50 percent.

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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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