摘要
该文基于正挠曲电效应建立了开口圆柱壳结构的挠曲电传感器模型。首先分析了开口圆柱壳的动态响应特性;其次根据正挠曲电效应,建立了由动态应变梯度引起的挠曲电传感理论,并推导出模态电压的表达式,挠曲电效应引起的挠曲电传感信号由长度方向弯曲应变引起的挠曲电信号与圆周方向弯曲应变引起的挠曲电信号两部分组成,分析了挠曲电片无限小时各点的分布式传感特性;最后分析了不同模态的频率及弯曲角度对挠曲电传感信号的影响,对比分析了不同方向弯曲应变引起的挠曲电信号的不同作用。研究结果表明,该分析结果对优化开口圆柱壳结构的传感特性有重要意义。
A flexoelectric sensor model of cylindrical shell panel due to direct flexoelectric effect was established.Firstly,dynamic response of the panel was derived.Then,flexoelectric sensing theory due to the direct flexoelectric effect was employed,and modal voltage and power.Flexoelectric sensing signal induced by the flexoelectric effect contains two parts:the flexoelectric signal induced by the longitudinal bending strain and the flexoelectric signal induced by the circumferential bending strain.When the flexoelectric patch is infinite,the sensing characteristics of flexoelectric patch is the distributed sensing characteristics of each point.Finally,effects of different parameters on the sensing characteristics,such as mode shape,natural frequency,flexoelectric signal components,were analyzed to optimize the sensing signal,which was significant in engineering application.
作者
张旭方
刘丽
王鹏飞
傅佳宏
ZHANG Xufang;LIU Li;WANG Pengfei;FU Jiahong(Dept.of Mechanical and Electronic Engineering,School of Engineering,Zhejiang University City College,Hangzhou 310015,China)
出处
《压电与声光》
CAS
北大核心
2022年第2期283-288,共6页
Piezoelectrics & Acoustooptics
基金
浙江省自然科学基金/青年基金资助项目(LQ19A020004)
国家重点实验室开放课题基金资助项目(MCMS-E-0519G02)
浙江省教育厅高校国内访问学者“教师专业发展项目”(FX2021112)。
关键词
开口圆柱壳
传感器
传感特性
弯曲角度
弯曲应变
cylindrical shell panel
sensor
sensing characteristic
curvature angle
bending strain
