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战斗部舱内爆炸对舱室结构毁伤的实验研究 总被引:3,自引:0,他引:3
为探讨舰船抗爆抗穿甲防护结构设计,利用导弹模拟战斗部进行了舱室内部爆炸模型试验,研究内爆条件下高速破片和爆炸冲击波对舱室结构的联合毁伤效应,分析舱内爆炸环境下舱室板架结构的典型破坏模式.结果表明:模拟战斗部内爆载荷作用下舱室结构的整体变形以冲击波破坏为主;战斗部破片对舱壁板架产生侵彻穿孔破坏,并在近爆区板架上形成了破口密集区域;单个破口对舱室整体结构破坏影响不大,而密集破口区在后续冲击波作用下会发生撕裂,形成大破口,影响舱室整体结构性能.该研究结果,可用于指导舰船防护结构的设计. 相似文献
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固支方形板在水下爆炸冲击波载荷作用下动态响应数值仿真研究 总被引:2,自引:0,他引:2
舰船在实际海战中的抗打击能力是舰船生命力的重要指标.板格是舰船结构的基本组成单元,为了研究板格在爆炸载荷作用下的承载能力,采用数值方法研究了正方形板在水下爆炸冲击波载荷作用下的动态响应,分析了板的变形模式,研究了板厚和爆炸冲击因子对板的最大变形绕度的影响,推导出简单适用的经验公式. 相似文献
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爆炸荷载作用下的舰船防护舱壁的承载能力(英文) 总被引:1,自引:0,他引:1
大型水面舰船的防护舱壁需要设计成工作在薄膜应力状态下.利用能量法推导了在爆炸荷载作用下防护舱壁塑性大变形的计算公式、探讨了防护舱壁的最大承载能力,对防护舱壁的设计要求进行了讨论.与国外发表的有关试验结果进行了计算比较,结果表明该方法具有一定的应用价值. 相似文献
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加筋板作为船体结构的重要组成部分,其抗爆防护性能是衡量舰船生存能力的重要指标.文中利用有限元仿真软件LS-DYNA对水下爆炸冲击作用下船用加筋结构的动态响应特性及抗爆防护性能进行了研究.研究结果表明:水下爆炸冲击作用下加筋板的最大应变位于肋板所在位置,肋板结构类型是影响加筋板的变形响应速度及塑形变形幅值的重要因素.在相同面密度条件下,双层底加筋结构可有效提升结构整体的抗爆防护性能,相对于单层底加筋结构防护性能提高了30.15%. 相似文献
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水面舰船抗水下爆炸的性能是舰船生命力的重要方面,深受各国海军重视.以某型水面舰船为研究对象,基于夹层板进行舷侧结构设计;选取典型工况,采用三舱段模型技术,使用MSC.Dytran对夹层板舷侧结构在水下爆炸冲击波载荷作用下的动态响应进行仿真计算.比较分析了流-固耦合力、结构变形、速度、加速度、吸能等重要力学性能.结果表明夹层板应用于舰船舷侧结构使得结构的变形、位移减小,结构塑性吸能增加,显著改善了结构的冲击环境.夹层板是一种防护性能优良的结构形式,吸能效率较高,还减小了冲击波压力及冲量的吸收及传递,对减小舰船其它部位结构的损伤防护起到重要作用. 相似文献
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爆炸载荷作用下舰船板架的变形与破损 总被引:41,自引:6,他引:35
本文用能量法推导了一个计算爆炸载荷作用下舰船板架塑性变形及破损的公式,考虑了大变形时的应变关系及中面膜力的影响,并对国内外的有关试验进行了计算比较,结果表明此公式具有一定的应用价值。 相似文献
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舰船轴功率测量与应用研究 总被引:2,自引:1,他引:1
舰船轴功率是表征船体和主动力装置性能状态的重要参数之一。通过对轴功率等参数进行监测,并根据监测信息及时采取相应的维护措施,能够有效提高舰船的动力性、经济性和安全性。文章总结了舰船轴功率测量的基本原理,探讨了轴功率在舰船污底评估及主动力装置状态监控中的应用。 相似文献
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Y型激光焊接夹层板抗爆性能分析 总被引:3,自引:2,他引:1
金属基折叠式夹层板具有优良的抗冲击性能,Y型激光焊接夹层板(Y-LASCOR)作为其中一种新型结构,需对其抗爆性能进行分析研究.本文基于非线性有限元软件MSC.Dytran开展水下爆炸冲击波载荷作用下Y-LASCOR的抗爆性能研究,并在此基础上研究Y-LASCOR的主要尺寸参数对其抗爆性能的影响.研究结果表明,Y-LASCOR在水下爆炸冲击波载荷作用下,下面板发生膜拉伸变形,夹芯层发生压皱变形,对上面板起到缓冲作用,降低了上面板的损伤变形,改善了结构吸能效率,表现出了优良的抗爆性能;上、下面板厚度t(l),tb和夹芯壁厚tc在一定范围内可以有效改善Y-LASCOR的抗爆性能;夹芯层高度H对结构抗爆性能的影响不大. 相似文献
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《舰船科学技术》2016,(6):52-56
Pointing at naval ship projects creation and evaluation at stage of naval ship concept design,in the mechanism of integrated design based on naval ship synthesis model, ship projects creation and intelligent fuzzy evaluation method is researched, thus the applicability of each algorithm is obtained. Firstly,the naval ship synthesis model is introduced to design process, value and application status of synthesis model in integrated design is then exposed. Then the applicability of single target and multi targets SA algorithm is improved, and the quick generation of naval ship projects is done. After that, multiple projects evaluation method based on Vague fuzzy set is introduced to established the intelligent evaluation model, which can integrate effectively the quantitative and qualitative indexes. At last, the analysis of results comparison shows the advancement and rationality of each method. The example shows the integrated design process researched in this paper can be a great orientation of naval ship project design, and can also be used in other parts of naval ship development. 相似文献
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《舰船科学技术》2016,(11)
Pointing at naval ship projects creation and evaluation at stage of naval ship concept design,in the mechanism of integrated design based on naval ship synthesis model,ship projects creation and intelligent fuzzy evaluation method is researched,thus the applicability of each algorithm is obtained.Firstly,the naval ship synthesis model is introduced to design process,value and application status of synthesis model in integrated design is then exposed.Then the applicability of single target and multi targets SA algorithm is improved,and the quick generation of naval ship projects is done.After that,multiple projects evaluation method based on Vague fuzzy set is introduced to established the intelligent evaluation model,which can integrate effectively the quantitative and qualitative indexes.At last,the analysis of results comparison shows the advancement and rationality of each method.The example shows the integrated design process researched in this paper can be a great orientation of naval ship project design,and can also be used in other parts of naval ship development. 相似文献
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Development in advanced composite fabrication technology offers the clear prospect of cost effective application of polymer matrix composites for large load-bearing structures. However, polymer matrix composites can be severely degradated under the thermal condition caused by fire. This paper addresses the compressive load-bearing capacity for polymer matrix composite panels in naval structures and civil infrastructures under the combined thermal–mechanical condition. The failure modes arising from structural instability for single skin and sandwich panels in such combined thermal–mechanical condition are the focus in this study. The thermal field under fire heating and the degradation of mechanical properties with elevated temperature are discussed. Analytical solutions for these mechanical failure modes are presented for design considerations. The approach to the development of a quantitative methodology for fire protection design is discussed in the context of the analyses and the experiments. Design diagrams are constructed to design mechanical loads for given fire protection time, and on the opposite, to design fire protection time for given mechanical loads. 相似文献
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陆上模式堆、海军核动力实验室等陆上核动力设施在美国海军舰艇核动力技术的发展中发挥了至关重要的作用。美国海军极其重视其陆上核动力设施的安全,尤其是人员辐射安全,并形成了一套成熟的人员辐射安全控制方法,值得学习和借鉴。 相似文献