民用飞机舱门飞行锁机构接触力计算分析

Calculation Method Analysis on the Door’s Contact Force of the Flight Lock Mechanism for Civil Airplane

摘要:

研究飞机飞行锁机构中的接触力对于民用飞机飞行锁机构的设计具有重要意义。首先介绍飞行锁机构的功能和主要设计依据,阐明某民用飞机飞行锁机构的工作原理,并对其传力路径进行分析;然后采用工程算法、多刚体模型和多柔体模型三种计算方法计算飞行锁工作时曲柄与飞行锁摇臂之间的接触力;最后对三种计算方法进行对比,分析不同方法计算得到的接触力力值产生差异的原因。结果表明:多刚体模型计算值与工程算法计算值产生差异的主要原因是机构空行程导致的力臂变化,多柔体模型计算值与多刚体模型计算值产生差异的原因主要是受力过程中的结构变形。

Abstract:

In order to calculate the contact force of the flight lock mechanism, the function and main design basis of flight lock are firstly introduced in this paper. Then the working principle of the flight lock for a specific civil airplane is illustrated, following with the analysis of its force transmission path. Then three calculation methods (engineering method, rigid multi-body model, and flexible multi-body model) are used to compute the contact force between crank and rocker arm. Finally the three calculation methods are compared and analyzed to find out the reasons of the differences between the contact forces for each methods. The results shows that the arm variation caused by mechanism banking leads to the difference between the forces calculated by engineering method and rigid multi-body model. On the other hand, structure deformation is the main factor that causes the difference between the forces calculated by rigid multi-body model and flexible multi-body model. These analysis results can be consulted for the structural design of civil airplane’s flight lock.