Cymbal换能器发电性能的有限元分析  

FEM Analysis of Cymbal Transducer for Electricity Generation

作　　者：孙春华[1] 尚广庆[1] 于剑[2] 

机构地区：[1]苏州市职业大学机电工程系,苏州215104 [2]同济大学功能材料研究所,上海200092

出　　处：《机械科学与技术》2011年第1期138-141,共4页Mechanical Science and Technology for Aerospace Engineering

摘　　要：利用Cymbal换能器的正压电效应将应变能转化为电能,捕获能量,是开辟新能源的一条有效途径。采用有限元方法对Cymbal换能器力电耦合场进行分析,计算结果表明,换能器非共振条件短路电压随金属端帽底径的增大而增大,随金属帽厚度、顶径、内腔高度的增大而递减。最小二乘法的拟合结果呈现出上述参数对电压影响程度依次减弱的变化规律。选择合适的结构参数设计的Cymbal换能器,将其作为发电元件,可获得较高的电压及功率。The application of positive piezoelectric effect of the Cymbal transducer for transforming strain energy into electrical energy and then harvesting energy is an effective approach to obtain novel powers.The mechanical stress and electrical potential distributions of Cymbal transducers were analyzed with the finite element method（FEM）.The simulation results show that the short-circuit voltage with off-resonance frequency increases with the increase of the bottom diameter of the metal endcap,while it decreases with the increase of the metal thickness,top diameter and the depth of cavity of the metal endcap.The fitting results of the least-squares method reflected the variation rule of electrical voltage′s decrease with the above parameters in turn.It is demonstrated that a Cymbal transducer with optimized structural parameters can yield higher electrical output voltage and electrical power for energy harvesting.

关 键 词：CYMBAL换能器 能量收集 正压电效应 有限元方法 

分 类 号：TP21[自动化与计算机技术—检测技术与自动化装置]