【摘要】 薄膜应变计是一种用于高温应变测量的新型电阻式应变计，是航空发动机涡轮叶片等部件应力/应变参数测量、健康监测的先进技术。本文对航空发动机应变测量用高温薄膜应变计的应变传递过程进行了仿真研究，并与粘贴式应变计、喷涂式应变计的应变损失率进行了对比。结果表明，薄膜应变计由于其总厚度小、弹性模量水平高，在应变传递过程中应变损失率最低，应变测量准确性最高。同时，薄膜应变计的应变损失率随各膜层厚度的增加而增加。更多还原

【Abstract】 The thin film strain gauge is a novel resistive strain gauge used for high-temperature strain measurements,it is an advanced technology for measuring stress/strain parameters and health monitoring of aeroengine turbine blades. In this paper, the strain transfer process of high temperature thin film strain gauges used in aeroengine were simulated and compared with the strain loss rate of adhesive strain gauges and spray strain gauges. The results show that, due to their small total thickness and high elastic modulus level, the thin film strain gauges exhibit the lowest strain loss rate and the highest accuracy in strain measurement. Meanwhile, the strain loss rate of the thin film strain gauges increases with the thickness of each film layer.更多还原