|
|||||
|
|
| 全入射角度下平板冲击波的壁压载荷及局部空化特性 | |
| 引用本文： | 李海涛,朱石坚,陈志坚,牟金磊.全入射角度下平板冲击波的壁压载荷及局部空化特性[J].爆炸与冲击,2014,34(3):354-360. |
| 作者姓名： | 李海涛 朱石坚 陈志坚 牟金磊 |
| 作者单位： | 1.海军工程大学科研部，湖北 武汉 430033 |
| 基金项目： | 国家自然科学基金项目(51109216)~~ |
| 摘 要： | 以平面波理论为基础，推导了无限平板在全入射角度下的冲击波壁压载荷计算公式，利用实验数据对壁压公式进行修正，提出了一种适用于计算有限尺度平板壁压的经验公式；分析了不同入射角度下壁压载荷的变化特性，初步研究了壁压载荷负压特性对平板局部空化的影响。结果表明:修正后的壁压曲线与实际壁压曲线吻合较好；入射角度的增大会加快壁压衰减过程，并使最低壁压的绝对值减小；随着药量或平板厚度的增加，壁压最低负压的绝对值增大，形成局部空化的能力增强；局部空化仅在一定条件范围内才会形成，空化范围受局部空化形成压力及冲击强度等因素的影响较大。 |
| 关 键 词： | 爆炸力学 平板壁压 水下爆炸 冲击波 局部空化 斜入射 |
| 收稿时间： | 2012-10-08 |
Characteristicsofwallpressureandcavitation ontheplatesubjectedtounderwaterexplosionshockwaves atanyangleofincidence |
|
| LiHai-tao,ZhuShi-jian,ChenZhi-jian,MouJin-lei.Characteristicsofwallpressureandcavitation ontheplatesubjectedtounderwaterexplosionshockwaves atanyangleofincidence[J].Explosion and Shock Waves,2014,34(3):354-360. | |
| Authors: | LiHai-tao ZhuShi-jian ChenZhi-jian MouJin-lei |
| Institution: | 1.Office of Research & Development, Naval University of Engineering, Wuhan 430033, Hubei, China2.Department of Warship Engineering, Naval University of Engineering, Wuhan 430033, Hubei, China |
| Abstract: | Wallpressureasaloadparametershouldbeconfirmedexactly,andthenofferedforinvestigatingdynamicresponseofstructuresuchasaplatesubjectedtounderwaterexplosion. Onthebasis ofplaneshockwavehypothesis,atheoreticalformulawasdeducedandproposedtocalculatethewall pressurevaluesofaninfiniteplatesubjectedtounderwaterexplosionshockwavesatanyangleofincidence. Byusingthewallpressuredataderivedfromunderwaterexplosionexperiments,thetheoreticalformulaofwallpressurewasrevisedtobesuitableforplateswithfinitedimensions. Withtherevisedformula, thecharacteristicsofthewallpressureontheplatewereanalyzedbyconsideringvariousincidenceangles, andtheeffectsofthenegativewallpressurevaluesonlocalcavitationonthe platewerediscussedprimarily.Theresultsshowthatthewallpressurevaluesderivedfromtherevisedformulaagreewellwiththosefromtheexperiments. Astheincidenceangleincreases,thewall pressuredecaysmorerapidly,andtheabsolutevalueoftheminimum wallpressuredecreases.With themoreexplosiveorthethickerplate,theabsolutevalueoftheminimum wallpressureislarger, andlocalcavitationtakesplacemorelikely.Localcavitationcanonlycomeintobeingincertainconditions, andthecavitationrangewillbeaffectedbythefactorssuchascavitationpressurecriterion, shockintensity,andsoon. |
| Keywords: | mechanicsofexplosion platewall-pressure underwaterexplosion shockwaves local cavitation" target="_blank">cavitation')" href="#">local cavitation obliqueincidence |
| 本文献已被 CNKI 等数据库收录！ | |
| 点击此处可从《爆炸与冲击》浏览原始摘要信息 | |
| 点击此处可从《爆炸与冲击》下载免费的PDF全文 | |