关注我们: 登录 | 会员中心 | 手机版 | English

当前位置:中仿科技(CnTech)» 文献参考 » 高端装备制造仿真技术高端装备制造仿真技术
字体大小: 打印

基于多求解器耦合的冲击和碰撞下结构变形数值模拟

原文作者:
  X. Quan, N. K. Birnbaum, M.S. Cowler, B. I. Gerber
发布时间:
  2014-08-15
来    源:
  5th Asia-Pacific Conference on Shock and Impact Loads on Structures
下载链接:

Abstract

Spatial discretization in numerical analyses is typically based upon a single method such as Lagrange, Euler, a mixture of Lagrange and Euler - ALE (Arbitrary Lagrange Euler), ormeshfree Lagrangian -SPH (Smooth Particle Hydrodynamics). For the numericalsimulation of the deformation of structures under shock and impact loadings, each of the different solution techniques has unique advantages and limitations. For many engineering problems involving shock and impact, there is no single ideal numerical method that is appropriate to the various regimes of a problem. An approach wherein different techniques may be applied within a single numerical analysis can provide the “best” solution in terms of accuracy and efficiency. This requires not only that multiple spatial discretizations be used within a single modeling process but also that interaction and coupling between these different methods be implemented. To demonstrate the effective use of such a coupled multi-solver approach, the results of four real-life examples are presented in this paper. These are: a.) airplane impact and subsequent failure and collapse of New York World Trade Center North Tower, b.) oblique impact on a steelreinforced concrete slab, c.) underwater explosive loading on a submerged hollow metal cylinder, and d.) a pipe bomb explosion in a vehicle. These numerical simulations are performed with the nonlinear dynamic analysis computer code AUTODYN®. The correlation between the numerical results and the available experimental and observed data demonstrates that the coupled multi-solver approach is an accurate and effective analysis technique.