六自由度静定支持与约束技术在飞机载荷校准试验中的应用

The application of six degree of freedom statically determinate support and restraint technology in aircraft load calibration test

在研究以往飞机载荷校准试验时非静定支持与约束方式的基础上,首次提出了飞机六自由度静定支持与约束方法;根据载荷校准试验得到的飞机受力分析结果,对飞机起落架支持与约束载荷进行了分解和简化,建立了飞机六自由度静定支持与约束工程模型;结合某型飞机的载荷校准试验对该方法进行了试验验证,结果表明:采用该方法可实现对飞机约束载荷的理论计算和实时监控,保证了飞机机翼等复杂结构部件在高载校准工况下试验过程的安全、可控;使飞机机翼的试验载荷量级提高到了限制载荷的43%,机翼载荷建模精度可控制在3%以内。

Based on the researches on aircraft load calibration tests with statically indeterminate support and constraints, a six degree-of-freedom aircraft statically determinate support and constraint method is proposed for the first time. According to the analysis result of load calibration tests, the aircraft landing gear support and restraint load is decomposed and simplified, a six degree of freedom aircraft statically determinate support and constrained engineering model is built up. With load calibration test, a certain type of aircraft is tested, the results show that: the theoretical calculation of aircraft constraint load and real-time monitoring can be realized and it ensures the safety, controllability of complex structural components such as aircraft wing under high load calibration conditions, the test load magnitude of aircraft wing is increased to 43% of the limit load, the wing load modeling accuracy can be controlled within 3%.