泄爆薄板厚度对舱室破坏及舱内载荷影响的数值仿真
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摘要
[目的]为了研究DDG 1000驱逐舰所采用新型舷侧泄爆结构中泄爆薄板厚度对泄爆效果的影响,[方法]首先,通过实验数据验证仿真方法的可靠性;然后,运用有限元分析软件建立泄爆舱室的仿真模型,分析薄板泄爆结构的泄爆原理,研究不同薄板厚度下舱室破坏及舱内载荷的变化情况;最后,通过函数拟合,得到比冲量和挠度随泄爆薄板厚度变化的二次函数模型。[结果]结果表明:舱室的破坏失效最先发生在薄板和舱壁的连接处,并逐渐向舱壁边角扩大,且薄板厚度越小,越容易形成泄爆口;泄爆口的形成表现为薄板整体飞出舱体;泄爆结构的存在对初始冲击波超压的影响不大,但能有效降低舱内的准静态压力和比冲量;造成防护舱壁变形的主要因素是前期的初始冲击波和反射冲击波,而造成防护舱壁最终破坏的主要因素是长时间作用的准静态压力。[结论]研究结果可为舰船舷侧舱室等结构开展泄爆设计提供一定的参考。
[Objectives]The influence of the explosion venting plate thickness on the effect of the venting in the new type broadside structure adopted by the DDG 1000 destroyer is studied in this paper.[Methods]First,the reliability of the simulation method was verified by experimental data. Then the simulation model of the explosion venting cabin was established using the finite element analysis software.And the principle of thin-plate explosion venting structure was analyzed;the damage failure and load variation under different thin plate thicknesses were studied. Finally,the quadratic function model of specific impulse and deflection changing with the thickness is obtained by function fitting.[Results]The results show that the failure of the cabin first occurred at the connection between the thin plate and bulkhead,and gradually extended to the corners and edges of bulkhead;the thinner the plate,the likely an explosion venting opening is to form. When an explosion venting opening forms,the whole thin plate flies out of the cabin;the existence of the explosion venting structure has little effect on the initial shock wave overpressure,but it can effectively reduce the quasi-static pressure and specific impulse in the cabin. The main factors causing the deformation of the protective bulkhead are the initial shock wave and the reflected shock wave,and the main factor causing the ultimate damage of the protective bulkhead is the quasi-static pressure acting for a long time.[Conclusions]The research results can provide some reference for the explosion venting design of the ship side cabin structure.
[Objectives]The influence of the explosion venting plate thickness on the effect of the venting in the new type broadside structure adopted by the DDG 1000 destroyer is studied in this paper.[Methods]First,the reliability of the simulation method was verified by experimental data. Then the simulation model of the explosion venting cabin was established using the finite element analysis software.And the principle of thin-plate explosion venting structure was analyzed;the damage failure and load variation under different thin plate thicknesses were studied. Finally,the quadratic function model of specific impulse and deflection changing with the thickness is obtained by function fitting.[Results]The results show that the failure of the cabin first occurred at the connection between the thin plate and bulkhead,and gradually extended to the corners and edges of bulkhead;the thinner the plate,the likely an explosion venting opening is to form. When an explosion venting opening forms,the whole thin plate flies out of the cabin;the existence of the explosion venting structure has little effect on the initial shock wave overpressure,but it can effectively reduce the quasi-static pressure and specific impulse in the cabin. The main factors causing the deformation of the protective bulkhead are the initial shock wave and the reflected shock wave,and the main factor causing the ultimate damage of the protective bulkhead is the quasi-static pressure acting for a long time.[Conclusions]The research results can provide some reference for the explosion venting design of the ship side cabin structure.
引文
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[8]孔祥韶,吴卫国,李晓彬,等.舰船舱室内部爆炸的数值模拟研究[J].中国舰船研究,2009,4(4):7-11.Kong X S,Wu W G,Li X B,et al.Numerical simulation of cabin structure under inner explosion[J].Chinese Journal of Ship Research,2009,4(4):7-11(in Chinese).
[9]陈攀,刘志忠.舱室内爆冲击波载荷特性及影响因素分析[J].舰船科学技术,2016,38(2):43-48.Chen P,Liu Z Z.Research on loading of explosive and influencing factors inside closed cabin[J].Ship Science and Technology,2016,38(2):43-48(in Chinese).
[10]Edri I,Savir Z,Feldgun V R,et al.On blast pressure analysis due to a partially confined explosion:I.Experimental studies[J].International Journal of Protective Structures,2011,2(1):1-20.65
[11]Century Dynamics.AUTODYN theory manual,Version 4.3[M].Concord,CA,USA:Century Dynamic Corporation,2005.
[12]宁鹏飞,唐德高.起爆位置偏差对结构内爆炸荷载的影响分析[J].浙江大学学报(工学版),2012,46(12):2252-2258.Ning P F,Tang D G.Influence analysis of ignition location departure on blast load of close range internal blast[J].Journal of Zhejiang University(Engineering Science),2012,46(12):2252-2258(in Chinese).
[13]孔祥韶,吴卫国,李俊,等.角隅结构对舱内爆炸载荷影响的实验研究[J].中国造船,2012,53(3):40-50.Kong X S,Wu W G,Li J,et al.Experimental research of influence of corner structure on blast loading under inner explosion[J].Shipbuilding of China,2012,53(3):40-50(in Chinese).
[2]Downey J.DDG 1000 class destroy[R].The American Society of Naval Engineers(ASNE),Flagship Section,2013.
[3]Beach J L,Bruchman D D,Sikora J P,et al.Advanced double hull concept reduces costs,increases capabilities[J].AMPTIAC Quarterly,2003,7(3):1-10.
[4]刘建湖,周心桃,潘建强,等.舰艇抗爆抗冲击技术现状和发展途径[J].中国舰船研究,2016,11(1):46-56,71.Liu J H,Zhou X T,Pan J Q,et al.The state analysis and technical development routes for the anti-explosion and shock technology of naval ships[J].Chinese Journal of Ship Research,2016,11(1):46-56,71(in Chinese).
[5]杜俭业,杜志鹏,李营,等.舰船爆炸冲击防护技术进展[J].兵工学报,2015,36(增刊1):391-400.Du J Y,Du Z P,Li Y,et al.The progress of naval ship explosion protection technology[J].Acta Armamentarii,2015,36(Supp 1):391-400(in Chinese).
[6]刘晓明,张世联.有泄爆口的防爆舱在爆炸载荷下的响应研究[C]//2007年上海市船舶CAE.技术研讨会论文集.无锡:上海市造船工程学会,中国造船工程学会,2007:106-111.Liu X M,Zhang S L.Study on the response of explosion-proof chamber with venting port under blast loading[C]//Collected papers of 2007 Shanghai ship CAEtechnical Symposium.Wuxi:Shanghai Shipbuilding Engineering Society,China Shipbuilding Engineering Society,2007:106-111(in Chinese).
[7]侯海量,朱锡,李伟,等.爆炸冲击波和高速破片联合作用下舱室结构破坏模式试验研究[C]//中国钢结构协会海洋钢结构分会2010年学术会议暨第六届理事会第三次会议论文集.洛阳:中国钢结构协会海洋钢结构分会,中国船舶重工集团公司第七○二研究所,2010.Hou H L,Zhu X,Li W,et al.Experimental study on the failure mode of cabin structure under the combined action of blast wave and high-speed fragments[C]//Proceedings of the 2010 Academic Conference of the China Steel Structure Association Marine Steel Structure Branch and the Third Session of the Sixth Council.Luoyang:China Steel Structure Association Marine Steel Structure Branch,China shipbuilding industry corporation LTD.702 research institute,2010(in Chinese).65
[8]孔祥韶,吴卫国,李晓彬,等.舰船舱室内部爆炸的数值模拟研究[J].中国舰船研究,2009,4(4):7-11.Kong X S,Wu W G,Li X B,et al.Numerical simulation of cabin structure under inner explosion[J].Chinese Journal of Ship Research,2009,4(4):7-11(in Chinese).
[9]陈攀,刘志忠.舱室内爆冲击波载荷特性及影响因素分析[J].舰船科学技术,2016,38(2):43-48.Chen P,Liu Z Z.Research on loading of explosive and influencing factors inside closed cabin[J].Ship Science and Technology,2016,38(2):43-48(in Chinese).
[10]Edri I,Savir Z,Feldgun V R,et al.On blast pressure analysis due to a partially confined explosion:I.Experimental studies[J].International Journal of Protective Structures,2011,2(1):1-20.65
[11]Century Dynamics.AUTODYN theory manual,Version 4.3[M].Concord,CA,USA:Century Dynamic Corporation,2005.
[12]宁鹏飞,唐德高.起爆位置偏差对结构内爆炸荷载的影响分析[J].浙江大学学报(工学版),2012,46(12):2252-2258.Ning P F,Tang D G.Influence analysis of ignition location departure on blast load of close range internal blast[J].Journal of Zhejiang University(Engineering Science),2012,46(12):2252-2258(in Chinese).
[13]孔祥韶,吴卫国,李俊,等.角隅结构对舱内爆炸载荷影响的实验研究[J].中国造船,2012,53(3):40-50.Kong X S,Wu W G,Li J,et al.Experimental research of influence of corner structure on blast loading under inner explosion[J].Shipbuilding of China,2012,53(3):40-50(in Chinese).