CAJ | 학술논문

全尺寸飞机结构的静力和疲劳试验中，应变数据作为最主要的试验数据，其精确度直接影响到飞机结构的应力应变分析以及与理论计算的对比分析。给出了应变测量电桥三线测量法的理论依据，并通过计算对比分析了二线测量法与三线测量法的精度差异。
전척촌비궤결구적정력화피로시험중，응변수거작위최주요적시험수거，기정학도직접영향도비궤결구적응력응변분석이급여이론계산적대비분석。급출료응변측량전교삼선측량법적이론의거，병통과계산대비분석료이선측량법여삼선측량법적정도차이。
Strain data is the most important test data during full-scale static and fatigue tests of aircrafts .The accuracy of test data directly affects the stress-strain analysis of aircraft structures and the comparative analysis with theoretical calculations .This paper introduces the theoretical basis for three-wire Wheatstone bridge strain gage measurement ,and analyzes the accuracy differences between two-wire and three-wire strain gage measurement by calculation .