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《Sichuan Building Science》 2013-04
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The affect of the pivot element bar's dynamic stability with the relative length of piezoelectric stacks considering the damps

ZHU Junqiang,CHEN Chao,ZHAO Xiang,ZHU Xiyu(School of Civil Engineering,Xi'an University of Architecture & Technology,Xi'an 710055,China)  
Starting from the referential stability theory of energy principle,the dynamic stability equation is established on the basis of the dynamic stability equation that does not consider damping element.Then get the main element rods' first dynamical instability region in both cases,meanwhile influence of different mechnical and electrical driving force for the first dynamical instability region is considered.Results of above analysis show that the increase of mechnical and electrical driving force can make the first dynamical instability region smaller.The affects of piezoelectric stacks' relative length to the first dynamical instability region of piezoelectric pivot element bar is simulated in Matlab.The simulation results illustrate that with the increase of piezoelectric pile length the structural vibration control effect is more obvious in the condition that the piezoelectric pile length is less than or equal to half of the total length.This determines a suitable piezoelectric stack relative length in practical engineering.
【Fund】: 国家自然科学基金重大研究计划培育项目(90715003);国家自然科学基金项目(10972168);; 教育部高等学校博士学科点专项科研基金项目(200807030002 20096120120005);; 国家青年科学基金项目(51008245)
【CateGory Index】: TU311.2
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