| 半球阻波结构体底部的约束形式 |
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| 引用本文： | 李晓杰,秦小勇,闫鸿浩.半球阻波结构体底部的约束形式[J].爆炸与冲击,2010,30(1):7-11. |
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| 作者姓名： | 李晓杰 秦小勇 闫鸿浩 |
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| 作者单位： | 1.大连理工大学工业装备结构分析国家重点实验室,辽宁大连116023; |
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| 基金项目： | 大连理工大学理学学科研究基金 |
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| 摘 要： | 1.大连理工大学工业装备结构分析国家重点实验室,辽宁大连116023; 2.大连理工大学土木工程学院岩土工程研究所,辽宁大连116023
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| 关 键 词： | 爆炸力学 应力 约束 爆炸容器 冲击波 |
Base constraint forms of hemispherical shock-waves trap structures |
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| LI Xiao-jie,QIN Xiao-yong,YAN Hong-hao.Base constraint forms of hemispherical shock-waves trap structures[J].Explosion and Shock Waves,2010,30(1):7-11. |
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| Authors: | LI Xiao-jie QIN Xiao-yong YAN Hong-hao |
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| Institution: | 1.StateKeyLaboratoryofStructuralAnalysisforIndustrialEquipment,2.DalianUniversityofTechnology,Dalian116023,Liaoning,China; |
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| Abstract: | Theequivalentstressesofhemisphericalshock-wavestrapstructurewerecalculatedbythe finiteelementprogramLS-DYNAfordifferentconstraintformsandcomparedwiththeexperimental results.Theresultsshowthatthestressconcentrationhappensontheshellneartheentranceandexhaustportandthelocalstressesarefarhigherthanthose fotherparts.Inadditiontothesiteof stressconcentration,themaximumstressisatthethree-fourthoftheheightforthescalespherical shellmodel.Theoverallstressleveldecreasessignificantlyforthesphericalshellwiththefreebottom. Usingthefreebasetoplacethesphericalshellcanfurtherenhanceitscapacityagainstspherical implosion.Contrastingwiththeexperiments,themaximumstresslocationisinlinewiththenumericalresultsafterreinforcingpartsofstressconcentration. Byusingthefreebasetoplacethespherical shellonthegroundinthedesign,itcannotonlyimprovetheanti-explosioncapacityofspherical shells,butalsosavethefoundationtreatment,substantiallyreducesthecostofhemisphericalshock wavestrapstructures. |
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