飞机液压管道共振可靠性激励特性仿真计算
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摘要
飞机液压管道作为整个飞机的重要组成部分,其在随机振动环境下的共振可靠性是影响飞机安全的一项重要指标。建立了液压管道系统的参数化模型,利用有限元软件对系统进行动力学分析,得到了管道系统的前两阶模态,建立了激振力频率分布和固有频率分布的干涉模型,调用ANSYS概率分析模块,采用蒙特卡洛方法进行随机抽样,计算得到随机参数影响下管道系统的共振可靠度,进一步分析得到管道系统的共振可靠度为0.99时激励的均值和标准差,最后通过改变变异系数获得满足失效概率为0.01时激励的对应分布曲线,以及满足共振可靠度要求的激励均值的取值域,为管道防共振工程与设计提供一定的参考作用。
Aircraft hydraulic pipeline is an important part of the whole aircraft,and its resonance reliability in random vibration environment is an important indicator affecting aircraft safety. A parameterized model of the hydraulic piping system is built. The first two modes are carried out by the dynamic analysis of the pipe system. A excitation frequency-natural frequency interference model and ANSYS probability design module are adopted to get the resonance reliability of the pie system. According to the further analysis,the average value and standard deviation of the excitation are carried out while the resonance reliability value is 0.99. While the failure probability is 0.01,the distribution curve and range of average value of the excitation are presented though the change of the coefficient of variation,this will provide reference for the pipe anti-resonance engineering design.
Aircraft hydraulic pipeline is an important part of the whole aircraft,and its resonance reliability in random vibration environment is an important indicator affecting aircraft safety. A parameterized model of the hydraulic piping system is built. The first two modes are carried out by the dynamic analysis of the pipe system. A excitation frequency-natural frequency interference model and ANSYS probability design module are adopted to get the resonance reliability of the pie system. According to the further analysis,the average value and standard deviation of the excitation are carried out while the resonance reliability value is 0.99. While the failure probability is 0.01,the distribution curve and range of average value of the excitation are presented though the change of the coefficient of variation,this will provide reference for the pipe anti-resonance engineering design.
引文
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[11] 张屹尚,等.金属波纹管在航空管路中的动力学优化及可靠性分析[J].航空制造技术,2010,21:73-77.
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[13] 史进渊.机械零件振动的可靠性设计[J].振动工程学报,1999,12(4):553-558.
[2] 翟红波,吴子燕,李宝辉等.含非均匀轴向流的输液管道共振可靠性灵敏度分析[J].固体力学学报,2012,33(5):480-486.
[3] J S Wu,P Y Shih.The dynamic analysis of multispan fluid-conveying pipe subjected to external load.Journal of Sound and Vibration[J].2001,239(2):201-215.
[4] 姬贺炯,白长青,韩省亮.输流管道动力有限元建模及实验研究[J].应用力学学报,2013,30(3):422-427.
[5] 周瑞祥,苏新兵.飞机压力加油系统管道泄漏检测方法研究[J].空军工程大学学报,2002,3(6):7-9.
[6] 邹学锋,等.基于改进粒子群算法的管道动强度可靠性优化设计[J].航空制造技术,2012,20:84-87.
[7] 李松晶,鲍文.采用MATLAB Simulink的液压管路瞬态压力脉动分析[J].工程力学,2006,23(9):184-188.
[8] 郭长青,等.输流管道在分布随从力作用下的振动和稳定性[J].工程力学,2010,27(4):190-196.
[9] 王琳,等.随机激励下高压管道的疲劳寿命分析[J].华中科技大学学报,2003,31(12):100-102.
[10] 刘立名,等.基于非线性理论的海底管跨涡激共振可靠性研究[J].海洋技术,2003,22(2):23-27.
[11] 张屹尚,等.金属波纹管在航空管路中的动力学优化及可靠性分析[J].航空制造技术,2010,21:73-77.
[12] 何水清,王善.结构可靠性分析与设计[M].北京:国防工业出版社,1993.
[13] 史进渊.机械零件振动的可靠性设计[J].振动工程学报,1999,12(4):553-558.