压电加速度计在水工闸门模态测试中的应用  

Application of piezoelectric accelerometer in model test of hydraulic gate

作　　者：薛惠芳[1] 何青[2] 王游[1] 

机构地区：[1]南京工业大学机械与动力工程学院,江苏南京210009 [2]华北电力大学电站设备状态监测与控制教育部重点实验室,北京102206

出　　处：《传感器与微系统》2012年第12期143-145,152,共4页Transducer and Microsystem Technologies

基　　金：长江学者和创新团队发展计划资助项目(PCSIRT0720)

摘　　要：为了用试验法研究某水工闸门的振动特性,在分析压电加速度计性能指标的基础之上,针对某水利枢纽上的平面闸门,选用HK9104型压电加速度计,设计测试系统,运用脉冲锤击法进行模态测试,通过模态分析得到闸门结构的模态振型和模态参数。结果表明:闸门的固有频率以低频为主,分布在较宽范围内,这是引起流激振动的主要内因,压电加速度计具有较好的低频响应特性和较高的灵敏度。In order to study on the vibration characteristics of the hydraulic gate with the test method, on the basis of the performance indexes analysis of the piezoelectric accelerometer, HKg104 piezoelectric aceelerometer is chosen, the test system is designed, the model test is carried out with the pulse hammer method. The modal state vibration type and the modal parameters of the gate structure are obtained by the modal analysis. The results show that the natural frequency of the gate is mainly low frequency and is distributed in a wide range and flow-induced vibration occurs easily. The piezoelectric accelerometer has good low frequency response characteristics and high sensitivity.

关 键 词：压电加速度计 模态测试 水工闸门 振动特性 

分 类 号：TH825[机械工程—仪器科学与技术]