Accession Number:

AD0662893

Title:

THEORETICAL STUDY OF STRUCTURAL RESPONSE TO NEAR-FIELD AND FAR-FIELD SONIC BOOMS

Descriptive Note:

Final rept. 1 Jul-30 Sep 1966

Corporate Author:

DATACRAFT INC GARDENA CA

Report Date:

1966-10-01

Pagination or Media Count:

204.0

Abstract:

The study investigates the difference between near-field and far- field sonic boom intensities. To do so it defines a new intensity standard, effective static load which depends on load waveform as well as magnitude. Many sonic boom loading waveforms are computed for 19 structural elements, of various types, produced by two SST designs as well as F-104, B-58 and XB-70 aircraft. It is concluded that near-field booms are less intense than far-field booms, the magnitude of the difference depending on the character of the waveform. The more the waveform is distorted from a symmetrical far-field N-wave waveshape, the lower the near-field intensity. It is recommended that further theoretical study be made in order to quantify results and isolate the influence of specific parameters on boom intensity.

Subject Categories:

  • Structural Engineering and Building Technology
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE