极端气候环境下飞机结构热应力测试技术研究  

Research on Thermal Stress Measurement Technology for Aircraft Structure in Extreme Climate Environment

作　　者：刘海燕[1] 李闯勤 李红贤 任战鹏[1] 吴敬涛[1] 张惠[1] LIU Haiyan;LI Chuangqin;LI Hongxian;REN Zhanpeng;WU Jingtao;ZHANG Hui(Aircraft Strength Research Institute of China,Xi′an 710065,Shaanxi,China)

机构地区：[1]中国飞机强度研究所,陕西西安710065

出　　处：《工程与试验》2024年第4期10-12,24,共4页Engineering and Test

摘　　要：通过分析结构热应变产生原因和惠斯通电桥工作原理,得到了精确测试高低温环境下结构热应变的理论依据。提出了适用于飞机机翼盒段等大型复杂金属-复合材料混合结构的热应变测试方法,并通过测试方法对比验证了所提出方法的可行性和准确性。该方法可应用于飞机极端气候环境试验结构热应力测试,支撑飞机结构优化设计和极端气候环境下结构强度性能评定,可极大降低试验成本、提高试验效率。By analyzing the causes of thermal strain of structures and the working principle of Wheatstone bridge,the theoretical basis for accurately measuring the thermal strain of structures in high and low temperature environments is obtained.A thermal strain test method suitable for large and complex metal-composite hybrid structures such as aircraft wing boxes is proposed,and the feasibility and accuracy of the proposed method are verified by comparison of test methods.The method can be applied to the thermal stress test of aircraft structure in extreme climate environment,support the optimization design of aircraft structure and the evaluation of structural strength performance in extreme climate environment,which can greatly reduce the test cost and improve the test efficiency.

关 键 词：复合材料 混合结构 应变测试 热应变 热应力 热输出 

分 类 号：V216.4[航空宇航科学与技术—航空宇航推进理论与工程]