某行波管输能窗结构动力学特性与随机振动试验
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摘要
行波管工作在非常恶劣的环境下,对结构可靠性具有很高的要求。本文探讨了国内外学者及科研机构对行波管结构动力学特性分析的研究方法和研究情况,利用有限元模仿真分析和随机振动试验相结合的方法,进行了某行波管输能窗两种结构的力学机理分析、动力学特性分析和随机振动试验。结果表明,有限元仿真分析的结论与随机振动试验的结果是吻合的。
The microwave window structure of the traveling wave tube(TWT) was physically modeled,analytically simulated,and experimentally tested to improve its structural dynamic characteristics and to meet the stringent reliability requirements under harsh working environment.The structural dynamic characteristics of the two types of microwave windows,one with a simple support and the other with a canter-lever support,were simulated in finite element method,and evaluated in random vibration test.The simulated results agree fairly well with the measured results.According to the simulation,the simply supported TWT microwave window outperforms the canter-lever supported one with stronger rigidity and much higher inherent frequency.The tested results show that the simply supported TWT microwave window worked very well,and no leakage and no structural damage were observed.
The microwave window structure of the traveling wave tube(TWT) was physically modeled,analytically simulated,and experimentally tested to improve its structural dynamic characteristics and to meet the stringent reliability requirements under harsh working environment.The structural dynamic characteristics of the two types of microwave windows,one with a simple support and the other with a canter-lever support,were simulated in finite element method,and evaluated in random vibration test.The simulated results agree fairly well with the measured results.According to the simulation,the simply supported TWT microwave window outperforms the canter-lever supported one with stronger rigidity and much higher inherent frequency.The tested results show that the simply supported TWT microwave window worked very well,and no leakage and no structural damage were observed.
引文
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[15]符瑜慧.振动试验中主要参数的计算推导及应用[J].环境试验,2010,(3):12-15
[16]胡志强,等.随机振动试验应用技术[M].北京:中国计量出版社,1996
[2]孔有林.星载行波管可靠性的保证[J].空间电子技术,1997,(1):42-52
[3]王斌,苏振华.行波管的可靠性现状及其差距[J].真空电子技术,1999,(1):25-29
[4]Sosa E N.GenericTWT′s for Improved Performance[C].Mi－litary Communications Conference,San Diego,1994,(1):146-153
[5]Rocci Peter J.Therma－l Structural Reliability Assessment ofHelix TWT Interaction COircuit Using Finite Element analy－sis[C].Aerospace and Electronics Coinference,1993,(5):731-737
[6]NASA Reliability and Maintainability Steering Committee.NASA Reliability Practices for Design and Test[C].NASATechnicalMemorandum 4322,1991,(9)
[7]Saleeb A F,Prabhu M.Defect Localization Capabilities of aGlobal Detection Scheme:Spatial Pattern Recognition UsingFul－l Field Vibration Test Data in Plates[C].NASA TechnicalMemorandum 4322,2002,(8)
[8]Raina Sushil,Santra Mrityunjay.Analytical Determination ofThermal and Vibrational Performance of Coupled CavityTWT′s[C].Vacuum Electronics Conference,Costa Mesa,
[9]张勇,何小琦,宋芳芳.行波管可靠性研究探讨[J].可靠性分析,2008,(6):65-68
[10]何小琦,宋芳芳,刘守圭,等.功率行波管栅控电子枪振动模态特性与结构可靠性[J].可靠性物理与失效分析技术,2004,(1):1-5
[11]张勇,宋芳芳,何小琦.行波管栅控电子枪栅网的结构可靠性[J].真空科学与技术学报,2008,28(2):169-173
[12]苏杜煌,宋芳芳,何小琦,等.基于ANSYS平台开发的高效率行波管振动特性分析系统[J].真空电子技术,2008,(6):37-40
[13]周菥,姚列明.轮辐栅网的动力学模态分析及二次开发[J].西安邮电学院学报,2006,11(5):66-69
[14]田义宏,江雅婷.环境应力筛选中的振动试验方法[J].强度与环境,2010,37(6):18-24
[15]符瑜慧.振动试验中主要参数的计算推导及应用[J].环境试验,2010,(3):12-15
[16]胡志强,等.随机振动试验应用技术[M].北京:中国计量出版社,1996
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