北航航概期末考试复习参考试题范文

在当今的科学发展飞速的新时代，越来越多的高科技开始运用于我们的学习、工作和生活当中。科技，已成为我们走向高质量生活的一座桥梁，一根绳梯。ofvision.3,build,fittinginwiththeurbanmasterplaninYibincityrapidrailtransitlongtermnetwork,aswellasthevisionofYibincity,andfuturedevelopmentofrailtransitnetwork.4,Yibincity,preliminaryrailtrafficlevelsservicelevels,systemmodel,andtechnicalstandards.5,toensurethatnetworkcanbeimplemented.6,stableconditionsforplanningandsupportingofYibincitytracktrafficconstructionandformationofrailtransitindustry,provideconditionsforthestart-upanddevelopmentofrailtransitinYibincity.1.7technicalcoursetechnologyistheproject'sresearchprogramandresearchideas.Technologyreflectsthevariousstagesintheprocess,logicalrelationsbetweenvariouslevels,research,techniquesandphases.Networkplanningprocessthewholeprocesscanbedividedintofourparts,namely,backgroundresearch,networkarchitectureresearch,planningandimplementationofresearchandprogramminginterfaces.Figure1.7-1Yibincityrailtransitnetworkplanningtechnologyroadmapplanninginterfaceismainlyresponsiblefornetworkplanninginterfacewithfollow-upplanningtasks.NetworkplanningUrbanplanningsysteminatransitionalposition,onlinenetworkplanningiscompleted,willbecarriedoutassoonaspossiblethefollowingplanningprojects:1,detailedcontrolofthelandofrapidrailtransitnetworkplanning;2,thepartitioningfornetworkplanning;3,jointplanningofrailtransportandurbantransportinotherways;Detailedtechnicalcoursesseebelow.Figure1.7-2Generaltechnologyroutefigure2ndchapterCitystatusanddevelopmentplanning2.1citybasicprofile2.1.1航概期末考试复习参考试题1.第三代战斗机的标志性特点有哪些?第三代战斗机的性能有了明显的提升，具有更高的机动性能和超视距攻击能力，具有多用途、大航程、敏捷性、先进的综合航空电子和火控系统，更大的武器外挂能力，是名副其实的“空中优势”战斗机。采用多种气动布局形式。出现鸭式布局、无尾布局、三翼面布局、翼身融合、大边条翼、前缘机动襟翼、腹部进气等布局形式。采用了更为先进的发动机，涡轮风扇发动机广泛应用于三代机，推重比（发动机推力/飞机重量）达到并超过1.0第三代战斗机开始采用大量的诸如主动控制、空中加油、复合材料、放宽静稳定、电传操纵等先进技术。第三代战斗机的使用过载达到9左右，使用寿命一般在3000飞行小时上，机体除满足强度、刚度设计要求外，还考虑了安全寿命设计、破损安全或损伤容限设计。为减轻结构重量，第三代战斗机的框、梁、壁板等主体结构多采用整体构件，钛合金、铝锂合金、复合材料等先进轻质材料的用量明显增加。2.第四代战斗机的标示性特点有哪些？具备隐身能力。采用了推重比大于10并带有“矢量喷管”的涡轮风扇发动机。具有超机动、超声速巡航、中远程攻击能力。四代机很好的兼顾了隐身性和机动性，在不开加力燃烧的情况下可以进行超声速巡航。具有多目标攻击武器系统、综合式航电系统，主要机载武器为超视距攻击空空导弹。大量采用比强度、比刚度更高的轻质材料，其中复合材料、钛合金、铝锂合金等高性能轻质材料的用量大幅度增加，传统铝合金和钢的用量显著减少，机体按耐久性/损伤容限设计。3.什么是正常式气动布局？正常式气动布局有哪些优缺点？在当今的科学发展飞速的新时代，越来越多的高科技开始运用于我们的学习、工作和生活当中。科技，已成为我们走向高质量生活的一座桥梁，一根绳梯。ofvision.3,build,fittinginwiththeurbanmasterplaninYibincityrapidrailtransitlongtermnetwork,aswellasthevisionofYibincity,andfuturedevelopmentofrailtransitnetwork.4,Yibincity,preliminaryrailtrafficlevelsservicelevels,systemmodel,andtechnicalstandards.5,toensurethatnetworkcanbeimplemented.6,stableconditionsforplanningandsupportingofYibincitytracktrafficconstructionandformationofrailtransitindustry,provideconditionsforthestart-upanddevelopmentofrailtransitinYibincity.1.7technicalcoursetechnologyistheproject'sresearchprogramandresearchideas.Technologyreflectsthevariousstagesintheprocess,logicalrelationsbetweenvariouslevels,research,techniquesandphases.Networkplanningprocessthewholeprocesscanbedividedintofourparts,namely,backgroundresearch,networkarchitectureresearch,planningandimplementationofresearchandprogramminginterfaces.Figure1.7-1Yibincityrailtransitnetworkplanningtechnologyroadmapplanninginterfaceismainlyresponsiblefornetworkplanninginterfacewithfollow-upplanningtasks.NetworkplanningUrbanplanningsysteminatransitionalposition,onlinenetworkplanningiscompleted,willbecarriedoutassoonaspossiblethefollowingplanningprojects:1,detailedcontrolofthelandofrapidrailtransitnetworkplanning;2,thepartitioningfornetworkplanning;3,jointplanningofrailtransportandurbantransportinotherways;Detailedtechnicalcoursesseebelow.Figure1.7-2Generaltechnologyroutefigure2ndchapterCitystatusanddevelopmentplanning2.1citybasicprofile2.1.1(1)正常式布局是指机翼在前、水平尾翼在机身后段的布局型式。(2)正常式布局广泛采用，技术成熟，数据资源、知识储备和设计经验丰富，理论研究完善，生产技术也成熟稳定，同其他气动布局型式相比各项性能比较均衡。正常式布局飞机机翼-尾翼的组合具有较好的纵向和横航向稳定性。对于静稳定的正常式布局飞机而言，水平尾翼需产生负升力，全机升力减小，升阻比降低。平尾位于机翼的下洗区，影响平尾效率4.什么是鸭式气动布局？鸭式气动布局有哪些优缺点？（1）鸭式布局是指将水平尾翼安排在机翼之前的气动布局。（2）对于静稳定的飞机，鸭翼产生向上的平衡力，提高了全机的升力。在中大迎角时，鸭翼和主翼都产生脱体涡，两者相互作用，使涡系更稳定而产生很高的涡升力。鸭式布局机动性比正常式布局飞机更好鸭翼翼梢的涡流会使机翼的诱导阻力特性变差，增大了诱导阻力。大迎角下，如果鸭面前缘涡破裂，可能使飞机纵向静不稳定。鸭式布局在大迎角时俯仰力矩上仰严重。5.什么是隐身技术？飞机上有哪些主要和次要雷达波散射源？（1）是指通过降低飞行器的特征信号，使其难以被发现、识别和攻击的技术。（2）主要：腔体散射（进气道、尾喷管、座舱、雷达舱）二面角（机翼-机身、机翼-机身-挂架、垂直尾翼-水平尾翼）曲面镜面反射：机身，机翼、尾翼前后缘次要：缝隙：机翼、机身上舱门口盖缝隙以及机翼的襟、副翼缝隙台阶（不同部件间造成的结构台阶）螺/铆钉尖点小孔在当今的科学发展飞速的新时代，越来越多的高科技开始运用于我们的学习、工作和生活当中。科技，已成为我们走向高质量生活的一座桥梁，一根绳梯。ofvision.3,build,fittinginwiththeurbanmasterplaninYibincityrapidrailtransitlongtermnetwork,aswellasthevisionofYibincity,andfuturedevelopmentofrailtransitnetwork.4,Yibincity,preliminaryrailtrafficlevelsservicelevels,systemmodel,andtechnicalstandards.5,toensurethatnetworkcanbeimplemented.6,stableconditionsforplanningandsupportingofYibincitytracktrafficconstructionandformationofrailtransitindustry,provideconditionsforthestart-upanddevelopmentofrailtransitinYibincity.1.7technicalcoursetechnologyistheproject'sresearchprogramandresearchideas.Technologyreflectsthevariousstagesintheprocess,logicalrelationsbetweenvariouslevels,research,techniquesandphases.Networkplanningprocesst