Blast attacks to public structures and critical or military infrastructure present threats
that must be taken seriously. In modern asymmetric conflicts, force protection engineering
mainly deals with protection against explosions caused by IED's and the mitigation of blast
effects. Protective measures are based on practical experience with blast effects on structures
and personnel, or on modern methods such as simulations. Different methods can be used
to assess and analyze possible effects of blast attacks on constructions. Simulations can
be used to predict the effects of explosions and can help to discover adequate protection
measures. The aim of the article is to briefly present the use of AUTODYN software as
a possible way of predicting the effect of blast attack. Simulations in this field are applicable
not only in the military but in critical infra-structure protection too. The protection of
critical infrastructure against a terrorist attack is a one of the most challenging issue
nowadays. Government experts face problems with appropriate countermeasures in the
uncertain environment of unidentified IED threats.