工程科学学报，第39卷.第1期：88-95.2017年1月 Chinese Journal of Engineering,Vol.39,No.1:88-95,January 2017 D0L:10.13374/j.issn2095-9389.2017.01.012;htp:/journals..usth.edu.cn 高温应变栅丝蠕变对应变测量精度影响与补偿 王文瑞2)四，王刚)，胡挺)，张佳明) 1)北京科技大学机械工程学院，北京1000832)北京科技大学新型飞行器技术研究中心，北京100083 3)北京福田康明斯发动机有限公司，北京102206 ☒通信作者，E-mail:gmbitwrw@usth.cdu.cn 摘要接触式应变测量是材料和构件高温力学行为研究的必要手段，其测量精度是高温应变测量领域关注的热点，而应变 栅丝的高温蠕变性能是测量精度的主要影响因索.本文首先根据材料蠕变机理分析应变片的蠕变特性，搭建高温应变栅丝 蠕变电测的系统，基于诺顿蠕变规律与试验的测量结果，建立应变栅丝的高温蠕变模型.论文基于应变栅丝蠕变输出有限元 模型，对栅丝蠕变输出的影响因素进行研究：最后建立了高温应变蠕变补偿模型，以提高高温应变测量精度，并取得了试验 验证. 关键词高温；蠕变；应变片；应变测量；精度 分类号TH73 Influence of high temperature strain grid wire creep on strain measurement precision and its compensation WANG Wen-rui),WANG Gang),HU Ting),ZHANG Jia-ming) 1)School of Mechanical Engineering,University of Science and Technology Beijing,Beijing 100083,China 2)Research Center for Aerospace Vehicles Technology,University of Science and Technology Beijing,Beijing 100083,China 3)Beijing Foton Cummins Engine Co.Ltd,Beijing 102206,China Corresponding author,E-mail:gmbitwrw@ustb.edu.cn ABSTRACT Contact strain measurement is a tool for studying the high temperature mechanical behavior of components and materi- als.The measurement precision is the key point of the high temperature strain measurement field,where creep is the main factor that affects the measurement precision at high temperature.In this paper,the creep characteristics of strain gauges were analyzed according to the material mechanism of creep by a high temperature strain measurement system.A grating creep model was obtained from the creep rule and experiment measurement results.Based on the grating creep model,the influence factors of strain gauge creep output were studied by the finite element model.Finally,a compensation model of high temperature strain creep was established to improve this high temperature strain measurement precision,and it was validated by experimental data. KEY WORDS high temperature;creep;strain gauges;strain measurement;precision 高温应变片是高温结构应力应变测量领域使用最福炎[鬥研究了瞬态加热条件下高温应变计测量误差的 广泛的传感器，其敏感栅丝的高温性能直接影响测量 修正方法，取得了很好的效果：易晖和张卫)研究应变 的可靠性与准确性山.目前，学界对应变片测试精度片横向效应对应变测量精度的影响，对测量结果进行 的研究已在各个领域深入展开，取得了一些进展.尹 修正，并在工程实例中得到应用：吴东等介绍在电弧 收稿日期：2016-03-15 基金项目：国家重大科学仪器设备开发专项资助项目(2011YQ14014507):航空科学重点实验室基金资助项目(20145674004)：中央高校基本 科研业务费资助项目(FRF-TP-15-023A3)工程科学学报,第 39 卷,第 1 期:88鄄鄄95,2017 年 1 月 Chinese Journal of Engineering, Vol. 39, No. 1: 88鄄鄄95, January 2017 DOI: 10. 13374 / j. issn2095鄄鄄9389. 2017. 01. 012; http: / / journals. ustb. edu. cn 高温应变栅丝蠕变对应变测量精度影响与补偿 王文瑞1,2) 苣 , 王 刚1) , 胡 挺3) , 张佳明1) 1) 北京科技大学机械工程学院, 北京 100083 2) 北京科技大学新型飞行器技术研究中心, 北京 100083 3) 北京福田康明斯发动机有限公司, 北京 102206 苣 通信作者,E鄄mail: gmbitwrw@ ustb. edu. cn 摘 要 接触式应变测量是材料和构件高温力学行为研究的必要手段,其测量精度是高温应变测量领域关注的热点,而应变 栅丝的高温蠕变性能是测量精度的主要影响因素. 本文首先根据材料蠕变机理分析应变片的蠕变特性,搭建高温应变栅丝 蠕变电测的系统,基于诺顿蠕变规律与试验的测量结果,建立应变栅丝的高温蠕变模型. 论文基于应变栅丝蠕变输出有限元 模型,对栅丝蠕变输出的影响因素进行研究;最后建立了高温应变蠕变补偿模型,以提高高温应变测量精度,并取得了试验 验证. 关键词 高温; 蠕变; 应变片; 应变测量; 精度 分类号 TH73 Influence of high temperature strain grid wire creep on strain measurement precision and its compensation WANG Wen鄄rui 1,2) 苣 , WANG Gang 1) , HU Ting 3) , ZHANG Jia鄄ming 1) 1) School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China 2) Research Center for Aerospace Vehicles Technology, University of Science and Technology Beijing, Beijing 100083, China 3) Beijing Foton Cummins Engine Co. Ltd, Beijing 102206, China 苣 Corresponding author, E鄄mail: gmbitwrw@ ustb. edu. cn ABSTRACT Contact strain measurement is a tool for studying the high temperature mechanical behavior of components and materi鄄 als. The measurement precision is the key point of the high temperature strain measurement field, where creep is the main factor that affects the measurement precision at high temperature. In this paper, the creep characteristics of strain gauges were analyzed according to the material mechanism of creep by a high temperature strain measurement system. A grating creep model was obtained from the creep rule and experiment measurement results. Based on the grating creep model, the influence factors of strain gauge creep output were studied by the finite element model. Finally, a compensation model of high temperature strain creep was established to improve this high temperature strain measurement precision, and it was validated by experimental data. KEY WORDS high temperature; creep; strain gauges; strain measurement; precision 收稿日期: 2016鄄鄄03鄄鄄15 基金项目: 国家重大科学仪器设备开发专项资助项目(2011YQ14014507);航空科学重点实验室基金资助项目(20145674004);中央高校基本 科研业务费资助项目(FRF鄄鄄TP鄄鄄15鄄鄄023A3) 高温应变片是高温结构应力应变测量领域使用最 广泛的传感器,其敏感栅丝的高温性能直接影响测量 的可靠性与准确性[1] . 目前,学界对应变片测试精度 的研究已在各个领域深入展开,取得了一些进展. 尹 福炎[2]研究了瞬态加热条件下高温应变计测量误差的 修正方法,取得了很好的效果;易晖和张卫[3]研究应变 片横向效应对应变测量精度的影响,对测量结果进行 修正,并在工程实例中得到应用;吴东等[4]介绍在电弧