摘要
采用密度相同的不可压金属材料实体单元模拟飞机多功能扰流板作动器中的液压油,并设置液压油实体单元与作动器简体和活塞杆四面体单元的接触对,建立了考虑固-液耦合效应的多功能扰流板有限元分析模型,计算了多功能扰流板自由振动的六阶固有频率及其模态振型。在此基础上,计算了多功能扰流板在标准随机激励下的振动疲劳应力,采用线性累积损伤理论的频域表示法,估算了多功能扰流板的振动疲劳寿命。分析结果表明,多功能扰流板满足相应的设计要求。
Solid element of incompressible metal material with the same density is adopted to simulate the hydraulic oil filled in the aircraft multifunctional spoiler,and through the setting of contact pairs between solid elements of hydraulic oil with the tex elements of cylinder and piston,the finite analysis model considered with the solid-fluid coupling effect of multifunctional spoiler is built,and then the natural frequencies and vibrational modes of the first six order of the multifunctional spoiler in free vibration have been obtained.On the basis,vibration fatigue stress of the multifunctional spoiler subjected to standard random is calculated,also the vibration fatigue lifetime of multifunctional spoiler is estimated by using linear cumulative damage theory presented with frequency domain method,and analysis result indicates that multifunctional spoiler could meet the corresponding design requirements.
出处
《飞机设计》
2015年第4期1-5,13,共6页
Aircraft Design
基金
国家自然科学基金(51075019)
航空科学基金(20095251024)
关键词
多功能扰流板
固-液耦合
自由模态分析
振动疲劳
频域法
multifunctional spoiler
solid-fluid coupling
free mode analysis
vibration fatigue
frequency domain method
