某型飞机前起落架收放载荷当量化研究

飞机起落架的收放大部分是在飞机飞行时进行的，起落架主要承受着飞行时的气动载荷、质量力和惯性载荷，这些载荷的大小或方向随着飞机的飞行速度和起落架的收放不断发生变化。在地面进行起落架收放系统可靠性试验时，为真实反映起落架收放时的收放载荷，施加多大的收放载荷以及如何施加收放载荷成为起落架收放系统可靠性试验中的关键技术。本文对某型飞机起落架收放载荷进行了研究，提出了起落架收放载荷当量化处理的一种方法，并采用动力学软件对当量化结果进行了模拟分析，分析结果与飞行实测结果十分吻合，而且该当量化方法简易可行，便于在起落架收放系统可靠性试验中施加载荷。

Retraction load equivalent research of a certain airplane nose gear

Most airplane landing gear retracts during airplane's flight. The landing gear is mainly subjected to aerodynamic load, flight overload and inertial load that change with flight speed and landing gear rotation angle. How to apply load on the ground to simulate the real situation that happens in the air becomes a key technology in the reliability test. This paper calculates a certain airplane's nose gear retraction actuating cylinder load in the retracting process and proposes an equivalent method. The dynamic simulation result agrees well with measurement statistical curve. This equivalent method applying to the landing gear retraction mechanism reliability test is simple and effective.