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时间:2019-11-26
《不同气流偏角下的壁板热颤振分析及多目标优化设计》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、第31卷第11期航空学报V01.31No.1l2010年11月ACTAAER()NAUTICAETASTRONAUTlCASINICANov.2010文章编号:1000—6893(2010)11—2195—07不同气流偏角下的壁板热颤振分析及多目标优化设计王晓庆,韩景龙,张军红(南京航空航天大学航空宇航学院,江苏南京210016)ThermalFlutterAnalysisofPanelandMulti—objectiveOptimizationDesignConsideringVariationsof
2、FlowYawAngleWangXiaoqing,HanJinglong,ZhangJunhong(CollegeofAerospaceEngineering,NanjingUniversityofAeronauticsandAstronautics,Nanjing210016,China)摘要:研究了考虑热效应的不同气流偏角下的壁板颤振问题及其多目标优化设计。采用考虑气流偏角影响的一阶活塞气动力、Von—Karmon大变形理论和准定常热应力理论建立了复合材料壁板热颤振方程。利用模拟退火算法,对不同温度
3、场下的偏航壁板颤振速度进行计算。以偏航壁板热颤振速度和壁板霞量为多目标函数,在不发生热屈曲的条件下进行优化设计。结果显示:温升使偏航壁板颤振发生“跳跃”现象,对应的气流偏角发生变化;当壁板热颤振模态不变时,偏航壁板颧振速度随温升呈下降趋势,两者呈线性关系;而当热颤振模态发生变化,即偏航壁板颤振发生“跳跃”现象时,偏航壁板颤振速度随温升先升高而后降低,两者呈非线性关系;Pareto解对应的多目标函数之间呈线性关系。关键词:壁板颤振;热额振;偏航壁板颇振速度;模拟退火算法;多目标优化中图分类号:V215.3
4、文献标识码:AAbstract:Thisarticleinvestigatesproblemsofflutteranalysiswiththermaleffectandmulti-objectiveoptimiza—tiondesignofalaminatedcompositepanelthattakesintoconsiderationvariationsofflowyawangle.Afiniteelementformulationofthecompositepanelflutter,whichca
5、naccountfortheeffectoftheflowyawangle,isestablishedusingtheVon-Karmanlargedeflectionplatetheory,thequasi-steadytheoryofthermalstressandthefirst—orderpistonaerodynamics.Thethermalflutterspeedsofthepanelunderyawedflowareobtainedbymeansofasimulatedannealing
6、optimizationalgorithm.Amulti-objectiveoptimizationdesignsubjectedtotheconstraintsonthecriticalbucklingtemperatureisconducted,inwhichthemsximumthermalflutterspeedan—deryawedflowandminimumweightofpanelsaretakenastheobjectivefunction.Theresultsshowthattheth
7、ermaleffectisabletoproduceatransitionphenomenoninpanelflutterunderyawedflow,andthatthecorre—spondingflowyawanglealsochanges.Onconditionthatthethermalfluttermodesarekeptunchanged,thethermalflutterspeedofthepanelunderyawedflowdecreasesapproximatelylinearly
8、asthetemperaturerises;whereasifthethermalfluttermodeschange,theflutterspeedfirstincreasesandthendecreasesasthetemper—aturerises,whichexhibitsanonlinearrelationshipbetweenflutterspeedandtemperatureelevation.Itisseenthatthet
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