钻石背弹翼抗风动力可靠性及其灵敏度分析
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摘要
基于首次超越破坏准则,建立了钻石背弹翼在随机风载荷下的动力可靠性模型,并对其动力可靠性的参数灵敏度进行了研究。通过对结构在随机振动载荷下动力响应超越安全界限次数的研究,得到了钻石背弹翼的动力可靠性模型,并利用综合分析技术分析了输入参数对钻石背弹翼抗风动力可靠性的灵敏度。研究结果表明:在只考虑随机风载荷的情况下,增大翼厚或后翼条弦长、减少前翼条弦长或前缘后掠角有助于提高钻石背弹翼的抗风动力可靠性,但在设计中需要综合考虑弹翼的气动外形及其载荷。
Based on the first passage failure principle,the dynamic reliability model of diamondback wing under the random wind load was established,and then its dynamic reliability sensitivity was analyzed under the same condition.Via researching the times with structural dynamic response passing through the safety limit on the load of random vibration,the dynamic reliability model of diamondback wing was obtained.And its dynamic reliability sensitivity under wind load was investigated by using the comprehensive analysis technology.The results show that,in considering the random wind load only,to increase wing thickness and chord length of back wing or reduce chord length of front wing and leading edge sweepback can improve the dynamic reliability of diamondback wing under wind load.But it is needed to take synthetically into account the aerodynamic contour and other loads in engineering design.
Based on the first passage failure principle,the dynamic reliability model of diamondback wing under the random wind load was established,and then its dynamic reliability sensitivity was analyzed under the same condition.Via researching the times with structural dynamic response passing through the safety limit on the load of random vibration,the dynamic reliability model of diamondback wing was obtained.And its dynamic reliability sensitivity under wind load was investigated by using the comprehensive analysis technology.The results show that,in considering the random wind load only,to increase wing thickness and chord length of back wing or reduce chord length of front wing and leading edge sweepback can improve the dynamic reliability of diamondback wing under wind load.But it is needed to take synthetically into account the aerodynamic contour and other loads in engineering design.
引文
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[2]Babcock J,Kannapel M.Numerical Simulation of the Free-stream Characteristics of the GBU-39/B Small DiameterBomb[R].U.S.Air Force T and E.Los Angeles:The Amer-ican Institute of Aeronautics and Astronautics,2008
[3]韩同来,廉小纯.一种改进的"钻石背"翼设计[J].弹箭与制导学报,2010,30(2):190～194
[4]吴小胜,雷娟棉,胡俊.钻石背弹翼的静气动弹性研究[J].北京理工大学学报,2010,30(12):1387～1390
[5]辛尊,丁运亮.高速民用运输机机翼的多学科设计优化[J].机械科学与技术,2012,31(1):79～82
[6]Pice S O.Mathematical analysis of random noise[J].Belle Sys-tem Technical Journal,1994,23:282～232
[7]Siegert A J F,Darling D A.The first passage problem for a con-tinuous Markov process[J].Annual of Mathematics Statistics,1951,24:624～641
[8]Coleman J J.Reliability of aircraft structures in resisting chancefailure[J].Operation Research,1959,7(5):639～645
[9]Chen J J,Duan B Y,Zeng Y G.Study on dynamic reliabilityanalysis of structures with multi-degree freedom[J].Computersand Structures,1997,62(5):877～881
[10]Chen J J,Chen J W,Sun H A,et al.Probabilistic dynamicanalysis of truss structures[J].Structural Engineering andMechanics,2002,13(2):231～239
[11]李创第,李桂青,黄任常.连续随机结构在随机载荷下的动力可靠性分析[J].武汉工业大学学报,1998,20(2)
[12]Chen J B,Li J.The extreme value distribution and dynamic reli-ability analysis of nonlinear stochastic structures[J].Earth-quake Engineering and Engineering Vibration,2005,4(2):275～286
[13]Chen J B,Li J.The extreme value distribution and dynamicreliability analysis of nonlinear structures with uncertain parame-ters[J].Structural Safety,2007,29(2):77～93
[14]Chen J B,Li J.Development process of nonlinearityebased relia-bility evaluation of structures[J].Probabilistic EngineeringMechanics,2007,22(3):267～275
[15]李桂青,曹宏等.结构动力可靠性理论及其应用[M].北京:地震出版社,1993
[16]Cupta I D,Trifunac M D.A note on statistic of level crossing andpeak amplitude in stationary stochastic process[J].EuropeanEarthquake Engineering,1998,12(3):52～58
[17]朱位秋.随机振动[M].北京:科学出版社,1998
[18]李杰,张琳琳.实测风场的随机Fourier谱研究[J].振动工程学报,2007,20(1):66～72
[19]欧进萍,王光远.结构随机振动[M].北京:高等教育出版社,1998
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