Title
Implementation of a user defined mine blast model in LSDYNA
Author
Tyler-Street, M.
Leerdam, P.J.C.
Publication year
2012
Abstract
A user defined mine blast model has been developed and implemented into the explicit finite element code LS-DYNA to provide a numerically efficient method for simulating an antivehicular mine blast. The objective is to provide a simple and robust numerical method which is able to represent both the distribution and magnitude of the load resulting from different charge configurations. The model is able to differentiate between the two distinct testing configurations of STANAG 4569 with the charge located in a steel pot or buried in saturated sandy gravel. At present, options to simulate a mine blast include using detailed Arbitrary Lagrangian Eularian (ALE) methods and a blast load using the CONWEP loading function. With ALE methods it is possible to simulate the different anti vehicular mine blast scenarios at the expense of CPU requirements. The implementation of CONWEP in LS-DYNA by Randers-Pehrson & Bannister [1] may be used to provide an initial approximation of a mine blast. The implemented user loading model uses data from both experiments and finite element simulations to describe the specific impulse versus radius for a charge configuration for a given standoff. The result is a simple and robust method to simulate the loading. This requires less CPU than the ALE method and provides a more accurate description of the load distribution than the CONWEP model as it accounts for the charge focusing. The resulting implementation of the mine blast model enables a range of different mine scenarios to be represented efficiently and the effects of the loading on the vehicle structure to be evaluated. The work serves both to increase the understanding of the complex events of a mine blast and how vehicle designs may be designed to withstand such loadings.
Subject
Mechatronics, Mechanics & Materials
EBP - Explosions, Ballistics & Protection
TS - Technical Sciences
Defence Research
Defence
Defence, Safety and Security
To reference this document use:
http://resolver.tudelft.nl/uuid:707783b8-3455-4ed1-aaa0-2f3881490fa6
TNO identifier
574356
Source
Proceedings 22nd MABS - Military Aspects of Blast and Shock, Bourges, France, 4-9 November 2012
Article number
Paper 40
Document type
conference paper