针对厚钢筋混凝土靶在弹体高速侵彻时的毁伤特性,基于混凝土连续帽盖模型(concrete continuous cap model,CSCM)和共节点耦合建模方法对弹体高速侵彻厚钢筋混凝土靶的毁伤行为进行数值模拟,分析钢筋混凝土靶的损伤分布特性、钢筋结构对...针对厚钢筋混凝土靶在弹体高速侵彻时的毁伤特性,基于混凝土连续帽盖模型(concrete continuous cap model,CSCM)和共节点耦合建模方法对弹体高速侵彻厚钢筋混凝土靶的毁伤行为进行数值模拟,分析钢筋混凝土靶的损伤分布特性、钢筋结构对混凝土的约束作用。结果表明:高速侵彻时,延性损伤体现在混凝土内部,脆性损伤更多体现在混凝土外部表层,钢筋网能较大程度地约束混凝土延性损伤的扩展;增加竖筋的配置,可预防厚钢筋混凝土靶沿钢筋层产生层断脱离破坏,从而提高钢筋混凝土的抗弹性能;钢筋混凝土迎弹面的崩落面积随侵彻速度增加而增大,首层钢筋越接近表面,约束效果越好。可见,混凝土连续帽盖模型和共节点耦合建模方法能较好地模拟厚钢筋混凝土靶在弹体高速侵彻作用下的毁伤特性。展开更多
The CSCM-S algorithm proposed by Lombard et al.is a very attractive tool for solving multidimensional Euler and Navier-Stokes equations.However,it is not economical due to the use of global sweeps in the whole computa...The CSCM-S algorithm proposed by Lombard et al.is a very attractive tool for solving multidimensional Euler and Navier-Stokes equations.However,it is not economical due to the use of global sweeps in the whole computational domain.In this paper we suggest a modified strategy,which combines a single-marching technique for supersonic dominated region with a multi-sweep procedure for pure subsonic and complex flowfield.The new algorithm may save significantly CPU time and is more suitable for engineering applications.展开更多
In the uncertain type and group of AHP, the element of judgement matrix can be an interval number. This paper expands the Column Summation Contrary Method (i. e. CSCM) of general AHP, gives the CSCM of calculation int...In the uncertain type and group of AHP, the element of judgement matrix can be an interval number. This paper expands the Column Summation Contrary Method (i. e. CSCM) of general AHP, gives the CSCM of calculation interval number weights, discusses the property of rank preservation, illustrates that CSCM is more reasonable and convenient from theory to reality.展开更多
文摘针对厚钢筋混凝土靶在弹体高速侵彻时的毁伤特性,基于混凝土连续帽盖模型(concrete continuous cap model,CSCM)和共节点耦合建模方法对弹体高速侵彻厚钢筋混凝土靶的毁伤行为进行数值模拟,分析钢筋混凝土靶的损伤分布特性、钢筋结构对混凝土的约束作用。结果表明:高速侵彻时,延性损伤体现在混凝土内部,脆性损伤更多体现在混凝土外部表层,钢筋网能较大程度地约束混凝土延性损伤的扩展;增加竖筋的配置,可预防厚钢筋混凝土靶沿钢筋层产生层断脱离破坏,从而提高钢筋混凝土的抗弹性能;钢筋混凝土迎弹面的崩落面积随侵彻速度增加而增大,首层钢筋越接近表面,约束效果越好。可见,混凝土连续帽盖模型和共节点耦合建模方法能较好地模拟厚钢筋混凝土靶在弹体高速侵彻作用下的毁伤特性。
基金The project supported by National Natural Science Foundation of China
文摘The CSCM-S algorithm proposed by Lombard et al.is a very attractive tool for solving multidimensional Euler and Navier-Stokes equations.However,it is not economical due to the use of global sweeps in the whole computational domain.In this paper we suggest a modified strategy,which combines a single-marching technique for supersonic dominated region with a multi-sweep procedure for pure subsonic and complex flowfield.The new algorithm may save significantly CPU time and is more suitable for engineering applications.
文摘In the uncertain type and group of AHP, the element of judgement matrix can be an interval number. This paper expands the Column Summation Contrary Method (i. e. CSCM) of general AHP, gives the CSCM of calculation interval number weights, discusses the property of rank preservation, illustrates that CSCM is more reasonable and convenient from theory to reality.
文摘马克·理查斯,美国供应链管理专业协会主席,美国联合仓储公司副总裁, 参与多个国际物流组织,包括仓储教育与研究委员会(WERC)和国际仓储物流联合协会(ILWA),同时担任多个领导职务。他在物流领域以提出“第三方物流供应商六步曲”及“怎样创建双赢关系理论"而著称,其理论在运输、仓储和外包等各种论坛被广泛引用。“有什么问题,请随时与我联系。非常感谢《运输经理世界》为CSCMP 以及物流最新知识所作出的传播贡献。”马克对《运输经理世界》(TRANSPORT BUSINESS CHINA)
