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《Machinery Design & Manufacture》 2013-05
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The Pretightening Force Effect of the Sandwiched Piezoelectric Ceramic Flexural Transducer Vibration Characteristics

ZHOU Chen,PI Jun(College of Mechanical Engineering,Jimei University,Fujian Xiamen 361021,China)  
Since the theoretical calculations of the sandwiched piezoelectric ceramic flexural transducer is complex,the design and calculation of the sandwiched piezoelectric ceramic flexural transducer without considering the influence of the pre-tighten force bolt will cause difference of the calculation value of vibration characteristics from the practical value.Taking bolt pre-tighten sandwiched piezoelectric ceramic flexural transducer vibration characteristics as the research object,should first ignore the pre-tighten force bolt to calculate transducer geometry size,then build model by the finite element software ABAQUS,considering the effect of the pre-tighten force bolt to fix the theoretical value and the mode of the sandwiched piezoelectric ceramic flexural transducer by applying different bolt pre-tightening force.Analysis of the sandwiched piezoelectric ceramic flexural transducer resonance frequency,node location,should focus on the analysis of front and back cover and the piezoelectric ceramic relative stress distribution,regarding the value of pre-tighten force did not have big effect on the resonance frequency,not have influence on node location,but have big effect on the front and back cover and the piezoelectric ceramic stress concentration.The pretightening force has big effect on the sandwiched piezoelectric ceramic flexural transducer impedance characteristics.It uses impedance analyzer to measure the value of the impedance in different bolt pre-tightening force.It discovers the decrease of value of the impedance changes with the increase of pre-tightening force.According to the transducer impedance characteristics and piezoelectric ceramics stress,it requires to design the best pre-tighten force values.
【Fund】: 国家自然基金项目(51175225)
【CateGory Index】: TB535
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