Improvements to the Sandia CTH Hydro-Code to Support Blast Analysis and Protective Design of Military Vehicles

摘要

High fidelity simulation of the effects of buried explosive devices on military vehicles requires accurate models of the Equation of State and constitutive properties of the soil and efficient procedures for applying blast loads in finite element structural dynamics codes such as LS-DYNA. The ERDC Hybrid Elastic Plastic (HEP) geo-material model has proven to be an effective model for a wide variety of soils and other geo-materials in Lagrangian finite element simulations of blast and penetration. This paper describes the implementation of the model in the Sandia CTH Eulerian hydro-code and verification of the implementation with experimental results from ERDC Impulse Measurement Device (IMD) tests. In addition, modifications to CTH to automate the extraction of blast pressures for use in LS-DYNA is described along with results from two large scale analyses that were used to validate the coupling procedure.