带穿孔三明治结构在爆炸载荷下的动态响应研究
|
摘要
考虑结极被破片穿孔预损伤,采用数值模拟方法进行了带穿孔三明治结极在爆炸冲击载荷下的结极动态响应研究。建立了不同结极参数下的带穿孔三明治平板三维数值模型;得到了带穿孔三明治结极动态响应的3个阶段幵分析了各阶段的特征。在此基础上,开展了不同穿孔数对三明治平板结极的动态结极响应、最大变形量和各部分内能的影响研究,结果表明:对于三明治结极,穿孔造成的孔径方向横向动能显著减少了结极垂直方向上的变形量;穿孔数增加使结极的承载方式由二维"面承力"过渡为一维"梁承力",使垂直方向变形增大和承载能力明显下降。研究成果为爆炸载荷下的带穿孔三明治结极动态结极响应和易损性建立了基础,同时也为三明治结极防护设计和研究提供了参考依据。
Considering the structure preforated by fragments, the dynamic response of the plane sandwich with pre-formed holes under blast loading was investigated by employing the numerical simulation. The numerical models based on structural parameters have been established. The structural dynamic response process has been divided into three specific stages and the deformation modes have been classified and discussed systematically. Based on this, the effect of the number of pre-formed holes on the structural dynamic response has been investigated. It is concluded that the radial kinetic energy of the pre-formed holes resulted from rarefaction wave obviously decreases the vertical displacement of the structure, and the increasing of the number of the pre-formed holes changes the 2D face bearing capacity to 1D beam bearing capacity, to increase the vertical displacement and obviously decrease the bearing capacity. The research results provide a foundation for the analysis of the dynamic structural response and vulnerability of the sandwich structure with pre-formed holes under blast loading, and also provide a reference for the design of sandwich structure protection.
Considering the structure preforated by fragments, the dynamic response of the plane sandwich with pre-formed holes under blast loading was investigated by employing the numerical simulation. The numerical models based on structural parameters have been established. The structural dynamic response process has been divided into three specific stages and the deformation modes have been classified and discussed systematically. Based on this, the effect of the number of pre-formed holes on the structural dynamic response has been investigated. It is concluded that the radial kinetic energy of the pre-formed holes resulted from rarefaction wave obviously decreases the vertical displacement of the structure, and the increasing of the number of the pre-formed holes changes the 2D face bearing capacity to 1D beam bearing capacity, to increase the vertical displacement and obviously decrease the bearing capacity. The research results provide a foundation for the analysis of the dynamic structural response and vulnerability of the sandwich structure with pre-formed holes under blast loading, and also provide a reference for the design of sandwich structure protection.
引文
[1]NYSTROM U,GYLTOFT K.Numerical studies of the combined effects of blast and fragment loading[J].International Journal of Impact Engineering,2009,36:995-1005.
[2]Lepp?nen J.Experiments and numerical analyses of blast and fragment impacts on concrete[J].International Journal of Impact Engineering,2005,31(36):843-860.
[3]YING LI,WEIGUO WU,HAIQING ZHU,et al.The influence of different pre-formed holes on the dynamicresponse of square plates under air-blast loading[J].Engineering Failure Analysis,2017,78:122-133.
[4]Rakv?g KG,UNDERWOOD NJ,SCHLEYER GK,et al.Transient pressure loading of clamped metallic plates with pre-formed holes[J].International Journal of Impact Engineening,2013,53:44-55.
[5]AUNE V,VALSAMOS G,CASADEI F,et al.On the dynamic response of blast-loaded steel plates with and without pre-formed holes[J].International Journal of Impact Engineering,2017,108:27-46.
[6]侯俊亮,蒋建伟,门建兵,等.预制孔靶板在爆炸冲击波载荷作用下的动态响应[J].爆炸与冲击.2013,33(6):662-666.
[7]蒋建伟,侯俊亮,门建兵,等.爆炸冲击波作用下预制孔靶板塑性变形规律的研究[J].高压物理学报.2014,28(6):723-728.
[8]董秋阳,陈富林.爆炸冲击波作用下机翼带孔蒙皮的损伤分析[J].机械制造与自动化.2013,42(6):46-48.
[9]刘新建.导弹总体分析与设计[M].长沙:国防科技大学出版社,2006.
[10]余旭东,葛金玉,段德高.导弹现代结极设计[M].北京:国防工业出版社,2007.
[11]LI W,HUANG G,BAI Y,et al.Dynamic response of spherical sandwich shells with metallic foam core under external air blast loading-Numerical simulation[J].Composite Structures,2014,116:612-625.
[12]HALLQUIST J O.LS-DYNA keyword user’s manual[M].Livermore Software Technology Corporation,2007.
[13]SHEN J,LU G,WANG Z,et al.Experiments on curved sandwich panels under blast loading[J].International Journal of Impact Engineering,2010,37:960-970.
[2]Lepp?nen J.Experiments and numerical analyses of blast and fragment impacts on concrete[J].International Journal of Impact Engineering,2005,31(36):843-860.
[3]YING LI,WEIGUO WU,HAIQING ZHU,et al.The influence of different pre-formed holes on the dynamicresponse of square plates under air-blast loading[J].Engineering Failure Analysis,2017,78:122-133.
[4]Rakv?g KG,UNDERWOOD NJ,SCHLEYER GK,et al.Transient pressure loading of clamped metallic plates with pre-formed holes[J].International Journal of Impact Engineening,2013,53:44-55.
[5]AUNE V,VALSAMOS G,CASADEI F,et al.On the dynamic response of blast-loaded steel plates with and without pre-formed holes[J].International Journal of Impact Engineering,2017,108:27-46.
[6]侯俊亮,蒋建伟,门建兵,等.预制孔靶板在爆炸冲击波载荷作用下的动态响应[J].爆炸与冲击.2013,33(6):662-666.
[7]蒋建伟,侯俊亮,门建兵,等.爆炸冲击波作用下预制孔靶板塑性变形规律的研究[J].高压物理学报.2014,28(6):723-728.
[8]董秋阳,陈富林.爆炸冲击波作用下机翼带孔蒙皮的损伤分析[J].机械制造与自动化.2013,42(6):46-48.
[9]刘新建.导弹总体分析与设计[M].长沙:国防科技大学出版社,2006.
[10]余旭东,葛金玉,段德高.导弹现代结极设计[M].北京:国防工业出版社,2007.
[11]LI W,HUANG G,BAI Y,et al.Dynamic response of spherical sandwich shells with metallic foam core under external air blast loading-Numerical simulation[J].Composite Structures,2014,116:612-625.
[12]HALLQUIST J O.LS-DYNA keyword user’s manual[M].Livermore Software Technology Corporation,2007.
[13]SHEN J,LU G,WANG Z,et al.Experiments on curved sandwich panels under blast loading[J].International Journal of Impact Engineering,2010,37:960-970.