超高速撞擊防護屏碎片云特性建模及損傷預(yù)報.pdf

1、哈爾濱工業(yè)大學(xué)碩士學(xué)位論文超高速撞擊防護屏碎片云特性建模及損傷預(yù)報姓名：張永強申請學(xué)位級別：碩士專業(yè)：固體力學(xué)指導(dǎo)教師：張偉管公順20050601蘭至鎏三些鑾：苫蘭堡主蘭竺鎏蘭AbstractThequantityofspacedebrisincreaseswithmankindspaceactivitiesdevelopment，SOtheorbitspacecraftsarebadlythreatened，Inordertoensu

2、resafelyoperationoforbitalspacecrafts，especiallylongdurationandlargesizespacecraRsSpacedebrisandmeteoroidprotectionmustbeconsideredinthedesigningofspacecraftsDebriscloudcreatedbyspacedebrisandmeteoroidhypervelocityimpact

3、onbumpermakesspacedebrisandmeteoroidthreattospacecrafisbecomedebriscloudthreattomodulewall，thereforethecharacterizationofdebriscloud，suchasvelocities，phasestateandspreadhalfangle，andpressurizedmoduleinterioratmospherepre

4、ssureandtemperaturechangeduetoshockwaveandseconddebriscloudmotioncreatedbydebriscloudimpactonmodulewallperforationmustbeknownTheresultscanprovidecriterionsandreferencesforspacecraftsstructuredesignTheanalysismodelofdebri

5、scloudcreatedbyaluminumsphericalprojectilehypervelocitynormalimpactonspacecraftaluminumbumperandtheeffectofshockwaveandseconddebriscloudcreatedbydebriscloudimpactonmodulewallperforationonmoduleinterioratmospherepressurea

6、ndtemperatureispresentedinthepaperthemodelisbasedontheconservationofmass，momentumandenergyaswellasthetheoryplaneshockwaveandthermodynamicandmodifiedTillotsonequationofstationInthepaper，formationmechanism，structureandshap

7、eofdebriscloudareexpounded；thecalculatedresultsareconsistentwithexperimentalresultsTheeffectofprojectilediameterbumperthicknessandimpactvelocityoncharacterizationofvelocities，phasestateandspreadhalfanglewereobtainedTheef

8、fectofdebriscloudcreatedbydifferentprojectileimpactvelocitiesonmoduleinterioratmospherepressureandtemperatureandthechangerulesofatmospherepressureandtemperaturewithdistancewerethealsoobtained，Someruleswerefoundthroughana

9、lysisFirst，axialvelocityandexpansionvelocityincreasewiththeincreaseofprojectilediameterandwiththedecreaseofbumperthicknessSecond，spreadhalfangleincreasewiththeincreaseofimpactvelocityandbumperthicknessandwiththedecreaseo