Rezaei A, Salimi Jazi M, Karami G, Ziejewski M
Mechanical Engineering Department, North Dakota State University, Fargo, ND 58108-6050, USA.
Int J Numer Method Biomed Eng. 2014 Aug;30(8):781-95. doi: 10.1002/cnm.2629. Epub 2014 Feb 11.
In this paper, a biomechanical study of a human head model exposed to blast shock waves followed by a blunt impact with the surface of the enclosing walls of a confined space is carried out. Under blast, the head may experience primary blast injury (PBI) due to exposure to the shockwaves and tertiary blast injury (TeBI) due to a possible blunt impact. We examine the brain response data in a deformable finite element head model in terms of the inflicted stress/pressure, velocity, and acceleration on the brain for several blast scenarios with different intensities. The data will be compared for open space and confined spaces. Following the initial impact of the shock front in the confined space, one can see the fluctuations in biomechanical data due to wave reflections. Although the severity of the PBI and TeBI is dependent on the situation, for the cases studied here, PBI is considerably more pronounced than TeBI in confined spaces.
本文对一个人体头部模型进行了生物力学研究，该模型先受到爆炸冲击波作用，随后在密闭空间内与封闭壁面发生钝性撞击。在爆炸作用下，头部可能因暴露于冲击波而遭受原发性爆震伤（PBI），也可能因可能的钝性撞击而遭受继发性爆震伤（TeBI）。我们在一个可变形的有限元头部模型中，针对几种不同强度的爆炸场景，根据施加在大脑上的应力/压力、速度和加速度来检查大脑响应数据。这些数据将在开放空间和密闭空间中进行比较。在密闭空间中冲击波前沿的初始撞击之后，可以看到由于波反射导致的生物力学数据波动。尽管PBI和TeBI的严重程度取决于具体情况，但对于此处研究的案例，在密闭空间中PBI比TeBI更为明显。
