Effects of Head Mounted Devices on Head-Neck Dynamic Response to +GZ Accelerations.

摘要

An investigation is described which addresses the inertial loading effects of Head Mounted Devices (HMD) on aviator head-neck-spine dynamic response during high +Gz acceleration exposure. The primary objectives of this study were to develop a methodology which could be used to establish limits on HMD inertial properties and to apply this methodology to the evaluation of the severity of the internal loads -- occurring in the neck and upper spine -- associated with certain specific HMD ensembles. This paper describes how the Head-Spine Model (HSM), a highly discretized, 3-D mathematical representation of the human head-spine- torso structure, was used to: (1) establish a set of baseline response criteria (BRC); (2) establish a preliminary methodology for setting limits on HMD inertial properties; and (3) evaluate the severity of the loading associated with possible chemical defense (CD) ensembles.