Accession Number:

AD0457349

Title:

DYNAMIC RESPONSE ANALYSIS OF +GX IMPACT ON MAN

Descriptive Note:

Corporate Author:

AEROMEDICAL RESEARCH LAB (6571ST) HOLLOMAN AFB NM

Personal Author(s):

• Feder, H. C.
• Root, E. H.

Report Date:

1964-11-01

Pagination or Media Count:

62.0

Abstract:

An analog computer was used to compare the dynamic response of an accelerometer placed over the sternum of human test subjects during impact in G sub x direction with the response of second and higher order spring-mass systems. Identity of the response modes of both systems, human and mechanical, was approximated by trial and error modification of natural frequency and damping coefficient of the computer model used. With restriction to only a few cases investigated and to the particular test conditions, best compliance of complete response coverage is considered to result from the application of a single spring-mass system of irregularly varying damping coefficient. A parametric analysis of the single spring-mass system is presented to aid the use of standardized impact profiles. The usefulness of the method of response approximation has been established, but the validation of the underlying concept of response predictability needs further investigation.

Descriptors:

• *STRESS(PHYSIOLOGY)
• *DECELERATION
• IMPACT
• BIOPHYSICS
• ANATOMICAL MODELS
• THORAX

Subject Categories:

• Stress Physiology
• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE