摘要：Dynamic behavior of structures exposed to blast loading have been widely investigated to assess the integrity of structures and to examine structural factors influencing survivability of occupants. Numerical simulation techniques are efficient design tools to estimate the response of structures under blast loading. This study investigates numerical simulation of blast loading by using LS-DYNA explicit solver. In LS-DYNA, blast simulations are carried out through the following methods: CONWEP, Arbitrary Lagrangian Eulerian (ALE), and hybrid CONWEP-ALE. The aim of this study is to evaluate three blast loading approaches in order to get better understanding on the requirements of computational effort, accuracy of blast loading scheme, and influence of element size. Therefore, an experimental testing of a flat plate subjected to blast loading is modeled using these three blast loading methods in LS-DYNA. Mesh resolution study of ALE formulation is also carried out to determine the effect of element mesh size on predicting blast loading effects that is converted through fluid structure interaction algorithm from Eulerian to Lagrangian type of elements. It is drawn a comparison between peak pressures calculated in simulations and maximum dynamic deformation measured in the field test. Finally, the discussion and conclusion are provided.
关键词：Blast loading;CONWEP;Arbitrary Lagrangian Eulerian (ALE) method;LS-DYNA;Numerical simulation;Mesh resolution study
