民用飞机机体连接结构动刚度计算分析及试验验证
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摘要
目的通过分析和试验得到民用飞机机体连接结构动刚度。方法通过理论分析,得到动刚度的推导公式,并运用有限元分析软件进行频响分析,进而得到连接结构动刚度。运用锤击法得到动刚度试验数据,并进行试验验证。结果试验结果受信号衰减的影响,低频范围内较难得到静刚度结果,但可以通过分析模型得到。试验刚度结果开始波动较大,但在高频范围趋于稳定,最终稳定在分析刚度值左右。当动刚度分析结果受频率影响变化不大时,可以采用动刚度分析均值来作为不同频率下的刚度值。结论通过频响分析得到民用飞机某种结构的动刚度变化曲线,并通过动刚度试验进行了试验验证,分析对比结果表明,有限元分析可以较为准确地得到机体支持结构动刚度,并用于工程实际。
Objective To get the dynamic stiffness of civil aircraft by analysis and test. Methods Theoretical method was used to get the derivation formula of dynamic stiffness and the FEM software was used to have frequency response analysis to get the dynamic stiffness of connecting structure. Hammer test was also carried out to get data on the dynamic stiffness test and carry out experimental verification. Results The test results were affected by signal attenuation. It was hard to get static stiffness under low frequency. But it could be obtained by model analysis. The test result of dynamic stiffness did not fluctuate greatly in the beginning, tending to be stable in the range of high frequency and was finally stabilized near to the stiffness value. When the dynamic stiffness was not affected much by frequency in analysis results, then the average dynamic stiffness in analysis result can be used as the finally stiffness for different frequency. Conclusion By frequency response analysis, the curve of dynamic stiffness for connecting structure of civil aircraft is get. The FEM method is confirmed by dynamic stiffness test. From the comparison, it can be seen that the FEM method can get the accurate dynamic stiffness and can be used in the engineering practice.
Objective To get the dynamic stiffness of civil aircraft by analysis and test. Methods Theoretical method was used to get the derivation formula of dynamic stiffness and the FEM software was used to have frequency response analysis to get the dynamic stiffness of connecting structure. Hammer test was also carried out to get data on the dynamic stiffness test and carry out experimental verification. Results The test results were affected by signal attenuation. It was hard to get static stiffness under low frequency. But it could be obtained by model analysis. The test result of dynamic stiffness did not fluctuate greatly in the beginning, tending to be stable in the range of high frequency and was finally stabilized near to the stiffness value. When the dynamic stiffness was not affected much by frequency in analysis results, then the average dynamic stiffness in analysis result can be used as the finally stiffness for different frequency. Conclusion By frequency response analysis, the curve of dynamic stiffness for connecting structure of civil aircraft is get. The FEM method is confirmed by dynamic stiffness test. From the comparison, it can be seen that the FEM method can get the accurate dynamic stiffness and can be used in the engineering practice.
引文
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[8]和法家,卢曦.某直升机橡胶减震器动刚度特性试验[J].实验室研究与探索,2014,33(3):41-44.
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[11]LIN Jaw-Ren.Dynamic Stiffness and Damping Characteristics of a Sine Film Thrust Bearing[C]//2016 International Conference on Advanced Manufacture Technology and Industrial Application(AMTIA 2016).Shang Hai:[s.n.],2016.
[2]李玲玲,王克明.某型航空发动机后支撑动刚度的有限元计算[J].沈阳航空工业学院学报,2007,24(3):5-7.
[3]HOU Yu-lei,YAO Jian-tao,ZENG Da-xing.Development and Calibration of a Hyperstatic Six-component Force/Torque Sensor[J].Chinese Journal of Mechanical Engineering,2009,22(4):505-513.
[4]姚利锋,周海亭,陶杰.有限元在大载荷橡胶隔振器设计中的应用研究[J].噪音与振动控制,2006(6):16-18.
[5]张俊,宋轶民,张策.少齿差环板式减速器的弹性动力学分析[J].机械工程学报,2008,44(2):118-123.
[6]刘建军.动力机器基础的动刚度研究[D].湖南:南华大学,2015.
[7]王志亮,刘波.动刚度分析在汽车车身结构设计中的应用[J].机械设计与制造,2008(2):34-35.
[8]和法家,卢曦.某直升机橡胶减震器动刚度特性试验[J].实验室研究与探索,2014,33(3):41-44.
[9]王宇,潘鹏.动刚度分析在车身NVH性能方面的研究与应用[J].农业装备与车辆工程,2016,54(4):34-38.
[10]李晓彤,杜志鹏.某舰尾轴架结构动刚度的实验研究[J].船舶工程,2005,27(6):41-44.
[11]LIN Jaw-Ren.Dynamic Stiffness and Damping Characteristics of a Sine Film Thrust Bearing[C]//2016 International Conference on Advanced Manufacture Technology and Industrial Application(AMTIA 2016).Shang Hai:[s.n.],2016.