基于应变法飞机起落架舱门载荷实测研究

Research on the load measurement of aircraft landing gear compartment door based on the strain method

飞机起落架舱门能否正常收放及其收放能力的大小直接影响飞机飞行安全。利用理论计算和风洞试验来计算无法得到舱门真实载荷,必须通过飞行试验来对理论计算和风洞试验结果进行修正,从而优化舱门设计。以某型飞机起落架舱门载荷测量为例,基于应变法对舱门载荷进行了飞行实测,并对舱门受载进行了分析,对起落架舱门及其收放机构优化设计提供数据支持。试验证明,该方法可有效用于舱门拉杆载荷实测。

It directly affects the safety of aircraft flight that whether the landing gear door can be normally extended and re- tracted and its extension and retraction capacity. The real load of the compartment door can＇ t be obtained through the theo- retical calculation and wind tunnel test. The results of theoretical calculation and wind tunnel test must be modified by flight test to optimize the design of the compartment door. Taking the load measurement of an aircraft landing gear compartment door as an example, the compartment door load was measured and analyzed by flight based on the strain method. Data sup- port was provided for optimization design of landing gear door and its extension and retraction. The test result showed that the method can be applied to the measurement of the rod load of the compartment door effectively.