STOCHASTIC MICRO-VIBRATION RESPONSE OF A SPHERICALLY SYMMETRIC PIEZOELECTRIC SHELL STRUCTURE AS SENSOR
The micro-vibration monitoring and control of vibration-sensitive precision facilities are important and the accurate measurement of microvibrations is necessary. The piezoelectric sensors such as piezoelectric shell structure have better electrical-mechanical coupling properties and less effect of bulk and weight. This paper studies the response characteristics of an interceptive spherical piezoelectric shell under stochastic boundary microvibration excitations. The equation for electric potential is integrated, and the displacement is transformed and expanded to yield the ordinary differential equations for the shell. The frequencyresponse function, power spectral density and correlation function matrices of the shell system response are derived. Then the root-mean-square displacement, stress and electric potential of the piezoelectric shell can be calculated. The numerical results are given to illustrate the stochastic electrical-mechanical coupling properties and the relation between boundary electric potential responses and micro-vibration excitations.
Piezoelectric spherical shell Micro-vibration excitation Stochastic response
Zu-guang YING Ju FENG
Department of Mechanics, School of Aeronautics and Astronautics, Zhejiang University, Hangzhou 310027, China
国际会议
深圳
英文
1-4
2011-12-09（万方平台首次上网日期，不代表论文的发表时间）