摘要
采用LS-DYNA970中约束自由度的方法,建立了钢筋混凝土板的有限元计算模型,用流固耦合方法和加载爆炸函数的方法,进行了爆炸加载下的数值模拟研究,研究表明在加载面上删除失效单元不多的情况下,采用加载爆炸函数法可以得到与流固耦合法相近的结果.采用约束自由度方法建立的钢筋混凝土模型简化了建模过程,计算精度与固结法相同.计算结果和文献中实验结果基本符合,约束自由度法用于钢筋混凝土结构在爆炸载荷下的数值模拟是简便可行的.
A constrained freedom-degree method of LS-DYNA970 was used in the finite element model of reinforced concrete slab. The blast-loading function method was discussed by comparing with the calculation results of coupling fluid-solid method. The results show a qualitative agreement with experimental phenomena under the conditions that few elements was deleted on the loading face. The constrained freedom-degree method for reinforced concrete is a convenient and practicable method in engineering numerical simulation, and the precision of constrained freedomdegree method is similar to rigid-connect method.
出处
《弹道学报》
EI
CSCD
北大核心
2008年第2期13-16,共4页
Journal of Ballistics
基金
国防科学技术大学基础研究基金项目
关键词
爆炸力学
钢筋混凝土
爆炸加载
数值模拟
explosive dynamics
reinforced concrete
blast loading
numerical simulation
