Accession Number : AD0740447

Title :   Two Biodynamic Models Used to Determine Optimum Energy Absorber Characteristics,

Corporate Author : AIR FORCE AEROSPACE MEDICAL RESEARCH LAB WRIGHT-PATTERSON AFB OH

Personal Author(s) : Carr, Richard W.

Report Date : DEC 1971

Pagination or Media Count : 22

Abstract : Energy absorbers are generally designed to generate a constant force over their stroke length since constant force or square wave devices are the most efficient. The document is concerned with the question of whether this type of energy absorber is suitable for protecting a seated man from high level accelerations such as those present in potentially survivable airplane crashes. The question was approached by using two biodynamic models of the seated human. One was used to determine human dynamic response to impact accelerations, for which the equations of motion of the system were determined. A computer program was used to solve for the seat acceleration which was then used as an input to a second biodynamic model.

Descriptors :   *AVIATION INJURIES, *ANATOMICAL MODELS, ANTHROPOMETRY, IMPACT SHOCK, ENERGY, ABSORPTION, COMPUTER PROGRAMMING, BIOPHYSICS, RESPONSE(BIOLOGY), SPINAL COLUMN.

Subject Categories : Stress Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE