航空学报 > 2016, Vol. 37 Issue (4): 1228-1239   doi: 10.7527/S1000-6893.2015.0268

飞机起落架动力学建模及着陆随机响应分析

吴卫国1,2, 孙建桥1, 冷永刚1, 贾腾1   

  1. 1. 天津大学机械工程学院, 天津 300072;
    2. 总后勤部军事交通运输研究所, 天津 300161
  • 收稿日期:2015-04-14 修回日期:2015-09-28 出版日期:2016-04-15 发布日期:2015-10-30
  • 通讯作者: 冷永刚,Tel.:022-27403285 E-mail:leng_yg@tju.edu.cn E-mail:leng_yg@tju.edu.cn
  • 作者简介:吴卫国,男,博士研究生,工程师。主要研究方向:机械系统动力学及优化设计。Tel:022-87401979 E-mail:wwg223@126.com;冷永刚,男,教授。主要研究方向:现代信号处理,智能诊断与动态测控,非线性动力学与结构特性分析。Tel:022-27403285 E-mail:leng_yg@tju.edu.cn
  • 基金资助:

    国家自然科学基金(51275336,11572215);天津市应用基础与前沿技术研究计划(15JCZDJC32200)

Dynamic modeling of landing gear and its random response analysis

WU Weiguo1,2, SUN Jianqiao1, LENG Yonggang1, JIA Teng1   

  1. 1. School of Mechanical Engineering, Tianjin University, Tianjin 300072, China;
    2. Military Transportation Research Institute of The General Logistics Department, Tianjin 300161, China
  • Received:2015-04-14 Revised:2015-09-28 Online:2016-04-15 Published:2015-10-30
  • Supported by:

    National Natural Science Foundation of China (51275336,11572215);Tianjin Research Program of Application Foundation and Advanced Technology (15JCZDJC32200)

摘要:

针对飞机起落架弹性结构特征的动力学建模及其离散结构简化响应分析问题,利用哈密顿变分原理,提出并建立了弹性结构的起落架动力学模型。根据此动力学模型,可自由选择起落架的结构离散数量进行动力学方程的求解和响应分析。以某型飞机着陆过程为研究实例,使用随机模拟方法,通过模拟飞机着陆下沉速度、初始位移和路面不平度,分析了飞机着陆过程起落架的随机响应特征,确定了起落架的实际动力学性能和应力应变特性,为后续起落架的结构参数优化及其疲劳性能分析提供了基础参考依据。

关键词: 飞机起落架, 动力学建模, 弹性结构, 哈密顿变分原理, 随机响应

Abstract:

For the elastic structure characteristics of aircraft landing gear, a dynamic model is established. Meanwhile, the problem is analyzed with the discrete structure simplified response. The Hamilton's variation principle is used for putting forward the landing dynamic model containing the elastic structure. According to the dynamic model, the number of discrete structures of landing gear can be free to choose for solving the dynamics equation and analyzing the response. Taking the analysis of aircraft landing process as an example, with the use of random simulation, through the simulation of the aircraft landing sinking speed, initial displacement and runway unevenness, the random response characteristics of the aircraft are analyzed on the landing. The actual dynamic performance and the stress-strain characteristics of landing gear are determined, providing a basic reference for the optimization of structure parameters and fatigue analysis of landing gear.

Key words: landing gear, dynamic modeling, elastic structure, Hamilton's variation principle, random response

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