N型防护结构的试验与仿真研究.pdf

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1、第28卷第2期实验流体力学Vo1．28。No．22014年O4月JournalofExperimentsinFluidMechanicsApr．。2014文章编号：1672—9897(2014)02—0099—06doi：10．11729／sy1t1x2O14pz16N型防护结构的试验与仿真研究文雪忠，柯发伟，陈萍，马兆侠，黄洁(中国空气动力研究与发展中心，四川I绵阳621000)摘要：在不增加空间碎片防护结构整体尺寸和质量的情况下，基于防护结构在斜撞击条件下弹道极限高于正撞击条件下弹道极限的特性，研究

2、了一种将3层平行铝板结构的中间层进行倾斜的N型防护结构，采用超高速碰撞试验和三维SPH数值仿真方法，定量对比了N型防护结构与相同面密度3层平行铝板结构的防护性能。研究结果初步证实，在正撞击情况下，倾斜的中间层具有提升结构防护性能的作用。关键词：超高速碰撞；空间碎片；防护结构中图分类号：V423文献标识码：ATestandsimulationofN—shapeshieldconfigurationWenXuezhong，KeFawei，ChenPing，MaZhaoxia，HuangJie(ChinaAe

3、rodynamicsResearchandDevelopmentCenter，Mianyang，Sichuan621000，China)Abstract：Inordertoimprovetheperformanceoftheshieldwithoutincreasingitsweightorsize．anN—shapeconfigurationwithanobliquemiddlewallisproposedinthestudybasedonthefactthattheballisticlimitofo

4、bliqueimpactishigherthanthatofnormalimpact．Theperform—anceoftheN—shapeconfigurationandaparalleltriple—wallconfigurationwiththesamearealden—sityarecomparedandanalyzedby3Dnumericalsimulation(SPH)andhypervelocityimpacttests．Thehypervelocityimpacttestsunderd

5、ifferentimpactconditionshavebeencarriedon．Thetestresults．whichareachievedundertheconditionthatthediameterofprojectileinthenormalimpactis4．0ramandtheimpactvelocityisabout3．0km／s，indicatthatthereislittledifferenceofdamageonrearplatesbetweenthetwoconfigurat

6、ions．Inanothernormalimpacttestwithaprojectilediameterof5．5ramandanimpactvelocityof4．8km／s，thedamagedifferencebecomeconsiderable．andthereisaperforationwithadiameterof2．0mmintherearplateofthetriple—wallconfigurationbutnoperforationhappenstotherearplateofth

7、eN—shapeconfigurationunderthesamecondition．Simulationwiththesameimpactparametersasthetestsiscarriedout．Theresultsshowthatthecriticalprojectilediameterofthetriple—wallconfigurationisabout4．1mmandthatofN—shapeconfigurationisabout4．3ram，whenthevelocityofthe

8、normalimpactis3．0km／s．ThecriticaIprojectilediameteroftriple—wallconfigurationisabout5．5mmandthatofN—shapeconfigurationisabout5．9mmunderthenormalimpactwithavelocityof4．8km／s．Thesimulationresultsareinaccordancewiththetestres