针对温度对应变片测试系统的影响, 运用有限元方法对应变片的热输出进行仿真研究。从理论上分析了应变片在非常温情况下产生的热输出、温度补偿和测量的技术问题;运用Ansys Workbench中稳态热模块和稳态结构模块对WK-05-125BZ-10C应变计热输出中线膨胀系数方面进行求解;结合卡玛合金在不同温度下对电阻温度系数的影响, 导出了该应变片的热输出。研究表明热输出的有限元计算结果与实验结果吻合较好。将仿真技术应用到应变片测试系统温度影响分析中, 具有广泛的应用前景, 研究结果为指导应变片测试系统的改进、优化和误差修正提供了依据。
Due to the importance of the temperature factor in the testing precision of electric resistance strain gauge, this article conducts the simulation research on thermal output of the strain gauge by using Ansys.The paper makes a theoretical analysis of the technical problems of the thermal output, temperature compensation and measurement produced from the strain gauge under the abnormal temperature;it makes use of the steady-state thermal module and static structure module in Ansys Workbench to solve expansion coefficient of the thermal output of WK-05-125BZ-10C strain gauge;it combines the effects of Karma alloy on resistance-temperature coefficient in different temperatures to derive thermal output of the strain gauge.Research shows that the calculation results using Ansys are coincident with experimental ones preferably..The research results provide a theoretical basis for improvement, optimization and correction of strain gauge testing system and an extensive prospect of application to introduce simulation technique into strain gauge testing system.
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