Analysis and Measurement of Helmeted Aircrewman Response Resulting from Birdstrike.
Abstract
The purpose of the research was to investigate and evaluate the birdstrike phenomena in terms of injury potential. Data collected during canopy testing indicated that significant deflection could occur and cause deformation into the space occupied by the helmeted aircrewman. The traveling wave and its interaction with the helmeted head created an unusual impact environment for which evaluation criteria did not exist. In order to generate new criteria it was necessary to utilize the Articulated Total Body Model (ATBM) and incorporate within the model characteristics of the canopy, the helmet and human head and neck system. With a configuration representative of the impact phenomena, the kinetic response of the system to selected impacts could be compared with biomechanical data to infer injury. the deformation characteristics of the canopy were established by analysis of F-16 film data collected during birdstrike tests. The data indicate that the canopy deformation depth is proportional to bird kinetic energy but that canopy deformation wave speed does not increase with bird speed. The helmet stiffness characteristics were established from available drop test data. Force-displacement curves were idealized for incorporation into the ATBM. These, along with canopy compliance data, were used to construct the stiffness at the canopy-helmet interference.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1980
- Accession Number
- ADA087737
Entities
People
- Norman S. Phillips
Organizations
- University of Dayton