Ⅰ-Ⅴ型夹芯板在近爆冲击波和破片群联合作用下防爆性能研究
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摘要
针对民用建筑物墙、板构件提出一种新型的Ⅰ-Ⅴ型夹芯板防护结构,采用非线性有限元软件LS-DYNA,开展近爆冲击波和破片群联合作用下Ⅰ-Ⅴ型夹芯板的防护性能研究.从质量损失、能量吸收和竖向峰值位移响应3个方面,研究了炸药比例距离、炸药起爆位置对夹芯板防护效果的影响,同时对夹芯板的实际防护性能进行了验证.结果表明:炸药比例距离对Ⅰ-Ⅴ型夹芯板的防护性能有较大的影响;不同炸药起爆位置对Ⅰ-Ⅴ型夹芯板的毁伤程度不同,在轴向增加起爆点的个数并不能显著增大Ⅰ-Ⅴ型夹芯板的毁伤程度;有Ⅰ-Ⅴ型夹芯板防护的钢筋混凝土板迎爆面只有少量混凝土脱落,且无钢筋外露,背爆面无混凝土脱落,也无钢筋外露,塑性变形区域较小,整体没有形成贯穿破坏,Ⅰ-Ⅴ型夹芯板的实际防护效果很好.
This paper presents a new Ⅰ-Ⅴ type sandwich panel structure for civil building wall and plate, and uses the nonlinear finite element software LS-DYNA to study the explosion protection properties of Ⅰ-Ⅴ type sand-wich panel under the combined loading of close-range blast wave and fragments. In terms of three aspects of mass loss, energy absorption and vertical peak displacement response, the influence of the explosive proportion distance,explosive initiation position on the protection effect of sandwich panels and the actual protective performance of sandwich panels were studied. The results show that the ratio of explosive distance has great influence on the protec-tive performance of Ⅰ-Ⅴ type sandwich panels. The damage degree of different explosive initiation points to Ⅰ-Ⅴ type sandwich panels is different, and the number of initiation points in axial direction can not significantly increase the damage degree of Ⅰ-Ⅴ sandwich panels. There is only a small amount of detached concrete and no reinforcement ex-posed on the front surface, while on the back surface, no concrete falls off and no reinforcement exposes with lesser plastic deformation area,and there is no penetrating damage to the whole with the protection of Ⅰ-Ⅴ sandwich panels.The damage degree of the reinforced concrete slab with Ⅰ-Ⅴ sandwich panel is far less than that of the unprotected concrete slab.
This paper presents a new Ⅰ-Ⅴ type sandwich panel structure for civil building wall and plate, and uses the nonlinear finite element software LS-DYNA to study the explosion protection properties of Ⅰ-Ⅴ type sand-wich panel under the combined loading of close-range blast wave and fragments. In terms of three aspects of mass loss, energy absorption and vertical peak displacement response, the influence of the explosive proportion distance,explosive initiation position on the protection effect of sandwich panels and the actual protective performance of sandwich panels were studied. The results show that the ratio of explosive distance has great influence on the protec-tive performance of Ⅰ-Ⅴ type sandwich panels. The damage degree of different explosive initiation points to Ⅰ-Ⅴ type sandwich panels is different, and the number of initiation points in axial direction can not significantly increase the damage degree of Ⅰ-Ⅴ sandwich panels. There is only a small amount of detached concrete and no reinforcement ex-posed on the front surface, while on the back surface, no concrete falls off and no reinforcement exposes with lesser plastic deformation area,and there is no penetrating damage to the whole with the protection of Ⅰ-Ⅴ sandwich panels.The damage degree of the reinforced concrete slab with Ⅰ-Ⅴ sandwich panel is far less than that of the unprotected concrete slab.
引文
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[2]徐强,曹阳,陈健云,等.混凝土重力坝接触爆炸的响应及破坏特性分析[J].湖南大学学报(自然科学版),2016,43(7):62-74.XU Q,CAO Y,CHEN J Y,et al.Study on the response and damage characteristic of concrete gravity dam subjected to contact explosion[J].Journal of Hunan University(Natural Sciences),2016,43(7):62-74.(In Chinese)
[3]陈长海,朱锡,侯海量,等.近距空爆载荷作用下双层防爆舱壁结构抗爆性能仿真分析[J].海军工程大学学报,2012,24(3):26-33.CHEN C H,ZHU X,HOU H L,et al.Numerical analysis of blast resistance of double-layer bulkhead structures subjected to closerange air blast[J].Journal of Naval University of Engineering,2012,24(3):26-33.(In Chinese)
[4]ZHU F,ZHAO L M,LU G X,et al.Deformation and failure of blast-loaded metallic sandwich panels:experimental investigations[J].International Journal of Impact Engineering,2008,35:937-951.
[5]WANG Z H,NING J G,ZHAO L M,et al.Experimental investigation on deformation and failure of metallic sandwich panels under blast loading[J].Material Research Innovations,2011,15:98-101.
[6]CHUNGKIMYUEN K,NURICK G N.Experimental and numerical studies on the response of quadrangular stiffened plates.part I:subjected to uniform blast load[J].International Journal of Impact Engineering,2005,31(1):55-83.
[7]LANGDON G S,CHUNGKIMYUEN S,NURICK G N.Experimental and numerical studies on the response of quadrangular stiffened plates.part II:localised blast loading[J].International Journal of Impact Engineering,2005,31(1):84-111.
[8]李伟,朱锡,梅志远,等.战斗部舱内爆炸对舱室结构毁伤的试验研究[J].舰船科学技术,2009,31(3):34-37.LI W,ZHU X,MEI Z Y,et al.Experimental studies on damage effect of missile war head on cabin′s structure under internal explosion[J].Ship Science and Technology,2009,31(3):34-37.(In Chinese)
[9]侯海量,张成亮,李茂,等.冲击波和高速破片联合作用下夹芯联合舱壁结构的毁伤特性[J].爆炸与冲击,2015,35(1):116-123.HOU H L,ZHANG C L,LI M,et al.Damage characteristics of sandwich bulkhead under the impact of shock and high-velocity fragments[J].Explosion and Shock Waves,2015,35(1):116-123.(In Chinese)
[10]段新峰,程远胜,张攀,等.冲击波和破片联合作用下I型夹层板毁伤仿真[J].中国舰船研究,2015,10(6):45-69.DAUN X F,CHEGN Y S,ZHAGN P,et al.Damage simulation of type I sandwich plate under shock wave and fragment joint action[J].Chinese Journal of Ship Research,2015,10(6):45-69.(In Chinese)
[11]CHUNGKIMYUEN S,LANGDON G S,NURICK G N,et al.Response of V-shape plates to localised blast load:experiments and numerical simulation[J].International Journal of Impact Engineering,2012,46:97-109.
[12]LEE S,BARTHELAT F,HUTCHINSON J W,et al.Dynamic failure of metallic pyramidal truss core materials experiments and modeling[J].International Journal of Plasticity,2006,22(11):2118-2145.
[13]ZHANG P,CHENG Y S,LIU J,et al.Experimental and numerical investigations on laser-welded corrugated-core sandwich panels subjected to air blast loading[J].Marine Structures,2015,40:225-246.
[14]KINNEY G F,GRAHAM K J.Explosive shocks in air[M].2nd ed.New York:Springer,1985:161-173.
[15]孙业斌.爆炸作用与装药设计[M].北京:国防工业出版社,1987:47-55.SUN Y B.Explosive action and charge de sign[M].Beijing:National Defence Industry Press,1987:47-55.(In Chinese)