通过应变阵列测量位移模态与曲率模态  

Measurement of displacement model and curvaturemodel by strain array

作　　者：黄仕卓 毛崎波[1] HUANG Shizhuo;MAO Qibo(School of Aircraft Engineering,Nanchang Hangkong University,Nanchang 330063,China)

机构地区：[1]南昌航空大学飞行器工程学院,江西南昌330063

出　　处：《传感器与微系统》2022年第2期5-8,13,共5页Transducer and Microsystem Technologies

基　　金：国家自然科学基金资助项目(51975266);江西省自然科学基金资助项目(20192BAB206024);江西省研究生创新专项资金资助项目(YC2019-S343)。

摘　　要：针对模态试验中使用加速度计时附加质量大、不易安装且对于结构曲率变化不敏感等问题,提出使用应变阵列测量位移模态与曲率模态。以悬臂梁为例,通过改变应变阵列的布置方法测量梁的位移和曲率模态,并与使用加速度计的模态分析结果进行对比。实验结果表明:通过改变应变阵列布置方法,可有针对性地提取结构的位移模态与曲率模态,且模态识别效果较好。与使用加速度计相比,应变阵列的主要优点在于其附加质量小,易于安装且能适用于复杂结构,成本低廉。Aimings at the problems of large additional mass,difficult to install and insensitive to structural curvature change,while using accelerometer in modal test,strain array is proposed to measure displacement model and curvature model.Taking the cantilever beam as an example,the displacement mode and strain mode of the beam are measured by using the different arrangement of the strain array,and the results are compared with the modal analysis results using the accelerometer.The experimental results show that the displacement mode and strain mode can be extracted by changing the strain array layout method,and the modal identification effect is good.Compared with the accelerometer,the main advantages of the strain array are small additional mass,easy to install and suitable for complex structures,and low cost.

关 键 词：应变阵列 实验模态分析 曲率模态 位移模态 模态参数 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TH113.1[自动化与计算机技术—控制科学与工程]