On the safety and reliability of high dynamic hydrocode simulations
On the safety and reliability of high dynamic hydrocode simulations
复制标题
DOI：
10.1002/(sici)1097-0207(19991030)46:6
复制
发表时间：
1999-10
影响因子：
2.9
通讯作者：
N. Gebbeken;M. Ruppert
中科院分区：
文献类型：
--
作者：
N. Gebbeken;M. Ruppert
混凝土在高动态荷载作用下的数值模拟是当前研究的一个课题。这种载荷在兆巴区域产生极高的压力，应变率高达108（1/s）。很明显，仅仅使用结构动力学的经典领域是不会成功的。通过将拉格朗日方法与欧拉方法耦合，考虑爆炸载荷与结构之间的相互作用，进行了Hydrocode模拟。为了使用流体代码模拟与试验结果进行比较，并为了改进方法以及材料定律，典型的方法固有方面，如离散误差和网格敏感性问题等，必须就不同层次的建模进行讨论和评估。版权所有© 1999约翰威利父子有限公司.
The numerical simulation of concrete subjected to high dynamic loadings, e.g. explosive charges, is a subject of current research. This kind of loading produces extremely high pressures in the megabar region and strain rates up to 108(1/s). It is obvious that one will not succeed by only using the classical field of structural dynamics. Hydrocode simulations have been carried out considering the interaction between explosive loading and the structure by coupling the Lagrangian with the Eulerian methodology. To use the hydrocode simulation for comparisons with test results and in order to improve the method as well as material laws, the typical methodical inherent aspects, like discretization errors and mesh sensitivity problems etc., have to be discussed and evaluated with respect to different levels of modelling. Copyright © 1999 John Wiley & Sons, Ltd.