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《Journal of Vibration and Shock》 2011-09
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Finite element dynamic response analysis under wind loads for antenna of China mobile based on limited vibration signals

LIU Jing-bo1,GUO Dong1,WANG Zong-gang2,FEI Bi-gang1,WANG Qian-yuan3 ( 1.Department of Civil Engineering,Tsinghua University,BeiJing 100084,China; 2.Key Laboratory of Structural Engineering and Vibration of China Education Ministry,Tsinghua University,BeiJing 100084,China; 3.China Mobile Communication Corporation BeiJing Branch,BeiJing 100007,China)  
A new method to perform the finite element analysis based on limited vibration signals measured on the spot was presented.The limited vibration signals of dynamic responses of structures(antennae of China Mobile) were measured under impulsive wind loads,such as the signals of acceleration time histories and their frequency spectrua.Meanwhile,the time histories of impulsive wind loads were simulated through the equation of motion of the structures,which were then applied to the finite element model.It the light of this finite element analysis,the correction factor k between simulated wind loads and practical wind loads was obtained,and the revised wind loads was applied again to the model.The internal forces of structure were thus gained under the closer approximation of practical impulsive wind loads.It is shown that the finite element analysis can get the results in accordance with those of experiments,which provides an easy method for total process analysis of structures under impulsive wind loads.
【CateGory Index】: TU311.3
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