On, Frank J. | Engineering Papers

NASA NTRS1988

ENVIRONET database on vibroacoustics

This paper discusses the current ENVIRONET computer based information management system on vibroacoustic (random vibration and acoustic) environments for Space Transportation System payloads. The application of the data base to support cost effective payload development programs is described. Included also is a discussion of the current status of the data base and future plans for expanding and improving the data base to include additional payload carriers, Space Station, and expendable launch vehicle payloads.

On, Frank J.↗

NASA NTRS1986

Simulation efficiency in acoustic testing of Shuttle payloads

Comparative evaluations of payload vibration responses from ground acoustic tests and Shuttle flights of several payloads indicate that ground acoustic testing will generally underestimate the Shuttle flight vibrational response of a payload, particularly in the low frequency range. This underestimation is found to be primarily due to the lack of simulation during the acoustic test of the in-flight mechanical energy transmission normally transmitted through the Orbiter-payload structural interface. It is suggested that test efficiency corrections be applied when developing random vibration criteria based on ground acoustic test data.

On, Frank J.↗