【作者】 刘鸣； 李小珍； 肖林；

【Author】 Liu Ming;Li Xiaozhen;Xiao Lin;Southwset Jiaotong University;

【机构】 西南交通大学；

【摘要】 为研究高速列车作用下桥梁跨中压电能量收集装置给桥梁传感器供电可行性,本文以跨度96m简支梁桥为原型,基于车桥耦合动力学理论,利用软件midas建立有限元分析模型,通过桥梁动力分析软件BDAP,计算CRH2动力车组以速度250km/h过桥时的动力响应,曲线拟合得到跨中双晶式压电悬臂梁的最终动位移响应。基于压电效应,推导出压电臂梁端位移、频率与收集电压的关系,进而得出可收集电压。研究表明,上述工况下可收集电压为4.22V,基本满足传感器的工作电压。更多还原

【Abstract】 In order to analysis the feasibility of power supply for middle span of bridge sensor form piezoelectric energy collecting device under the influence of high speed train.Based on vehicle bridge coupling dynamics theory and the prototype of a span of 96 m simply supported bridge.Use software MIDAS to build the vehicle bridge coupling model.Then calculate the dynamic response of the CRH2 EMU trains when pass the bridge with the speed of 250 km/h,through the bridge dynamic analysis software BDAP.The ultimate dynamic displacement response of the bimorph piezoelectric cantilever at midspan is obtained by curve fitting.Based on the piezoelectric effect,the relationship between the displacement,frequency and the collection voltage of the piezoelectric arm is deduced and the collecting voltage can be obtained.The research shows that the voltage can be collected at 4.22 V,which basically satisfies the sensor’s working voltage.更多还原