Effect of Human and Sheep Lung Orientation on Primary Blast Injury Induced by Single Blast.

摘要

The intensity and type of trauma inflicted on a body by blast overpressure are related to many factors. Among them, body orientation. In order to study the effect of body orientation, detailed models of 2D horizontal slices of human and sheep thoraces have been developed and validated with the limited data available in the open literature. The main goal of this study is to verify if the injuries observed in the animal are truly representative of human lung injuries for simple blast loadings at different orientations to the blast. In total, twelve blast directions were simulated for three different blast injury levels based on the Bowen curves. The sheep and the human torsos were rotated according to their vertical axis in increments of 30 degree starting from 0 degree through to 330 degree. From this study, it is predicted that the greatest reduction in lung primary blast injuries may be come from focusing on protecting the torso from -60 deg to +60 deg. Results showed also, that sheep are more dependent to the blast wave duration and orientation.