含有斜撑杆的单轮前起落架摆振稳定性分析

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (15) : 235-243.

论文

含有斜撑杆的单轮前起落架摆振稳定性分析

周家才，赵艳影，王伟凯，肖相志

作者信息 +

Shimmy stability analysis of single wheel nose gear with side spar

ZHOU Jiacai, ZHAO Yanying, WANG Weikai, XIAO Xiangzhi

Author information +

文章历史 +

摘要

以某轻型飞机为研究对象，考虑起落架绕支柱轴线的扭转自由度、起落架支柱下端部产生侧向位移和轮胎侧向变形。基于线性假设，建立了含有斜撑杆和减摆器的单轮前起落架摆振动力学模型。推导出摆振临界速度和临界频率的解析解，研究各结构参数对摆振临界速度的响应曲线，对解析解与数值解的误差进行分析，证明了采用解析解分析起落架摆振的可靠性。分析斜撑杆侧向刚度、侧向阻尼系数和安装点到起落架安装点距离对摆振临界速度的影响。研究表明，不考虑斜撑杆参数将会放大摆振稳定性区域，依此设计的减摆器阻尼偏小，在摆振临界速度附近更易发生摆振现象。因此，在研究该类型的起落架摆振稳定性问题时，斜撑杆的参数影响不能忽略。

Abstract

Taking a light aircraft as the research object, consider the torsional degree of freedom of the landing gear around the strut axis, the lateral displacement generated by the lower end of the landing gear strut, and the lateral displacement of the wheel. A single-wheel front landing gear shimmy vibration mechanics model containing a side spar and a shimmy damper was established based on the assumption of linearity. The analytical solution of the critical velocity and critical frequency of the shimmy vibration is derived. The response curves of the structural parameters to the critical speed of the shimmy are studied. Analyzing the errors between the analytical solution and the numerical solution and the reliability of the analytical solution to the shimmy of the landing gear is proved. We analyze the effects of lateral stiffness, lateral damping coefficient, and distance from the mounting point to the landing gear mounting point of the side spar on the critical velocity of shimmy vibration. Research has shown that the shimmy stability region will be amplified if the parameters of the side spar is not considered. The shimmy damper designed according to this is less damped, and the shimmy phenomenon is more likely to occur near the critical velocity of the shimmy. Therefore, the influence of the parameters of the side spar cannot be neglected in the study of the landing gear shimmy vibration stability problem.

导出引用

周家才，赵艳影，王伟凯，肖相志. 含有斜撑杆的单轮前起落架摆振稳定性分析[J]. 振动与冲击, 2024, 43(15): 235-243

ZHOU Jiacai, ZHAO Yanying, WANG Weikai, XIAO Xiangzhi. Shimmy stability analysis of single wheel nose gear with side spar[J]. Journal of Vibration and Shock, 2024, 43(15): 235-243

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