摘要
以飞机刹车装置为研究对象,对飞机刹车诱发振动问题进行了研究。针对飞机滑跑过程中的复杂制动环境对盘面摩擦特性影响,建立了考虑液压系统及盘面材料属性的刹车盘组非线性动力学分析模型,且为新材料技术的发展预留了模型接口。从实际工程应用价值出发,以机轮速度、液压系统等效阻尼、刹车盘面阻尼、盘面摩擦特性几类关键因素为控制变量,利用数值仿真与分岔理论等非线性分析手段研究了上述参数对系统稳定性的影响,并确定了使系统保持稳定的结构参数范围,方便对结构进行参数化快速分析设计。基于模型分析的结果,揭示了刹车振动产生的部分原因,从结构参数和刹车控制律两方面针对性的提出了对应的减振优化措施,进而形成了完整的飞机刹车诱导颤振的分析方法,为飞机制动器设计初期提供了理论参考依据。
Taking aircraft brakes as the research object,the problem of aircraft brake induced vibration was studied.Aiming at the influence of disc friction characteristics caused by the complex braking environment during aircraft skidding,a nonlinear dynamic analysis model of brake disc set was established considering the properties of the hydraulic system and disc material,with the model interface reserved for the development of new material technology.From the perspective of practical engineering research value,the influence of the above parameters on the stability of the system is studied by using numerical simulation,bifurcation theory,and other nonlinear analysis methods by considering key factors such as wheel speed,hydraulic system equivalent damping,brake disc surface damping and brake disc friction characteristics as control variables,and the range of structural parameters to keep the system stable is determined.It is convenient to parameterize the structure for rapid analysis and design.Based on the results of the model analysis,part of the causes of brake vibration were revealed,and corresponding optimization measures for vibration reduction were put forward from two aspects of structural parameters and brake control law.Then a comprehensive analysis method for aircraft brake induced flutter was formed,which provided a theoretical reference for the initial stage of aircraft brake design.
作者
蒋伟
张明
尹乔之
朱鑫
胡晓航
JIANG Wei;ZHANG Ming;YIN Qiao-zhi;ZHU Xin;HU Xiao-hang(Key Laboratory of Fundamental Science for National Defense-Advanced Design Technology of Flight Vehicle,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;College of Aerospace Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)
出处
《振动工程学报》
EI
CSCD
北大核心
2024年第5期770-779,共10页
Journal of Vibration Engineering
基金
航空科学基金资助项目(2022Z029052001)
中央高校基本科研业务费资助项目(NP2022416)。
关键词
刹车诱导振动
非线性模型
分岔理论
稳定性分析
减振措施
brake induced vibration
nonlinear model
bifurcation theory
stability analysis
vibration reduction measures
