Accession Number:

ADA046108

Title:

An Exposition on Aircraft Response to Atmospheric Turbulence Using Power Spectral Density Analysis Techniques

Descriptive Note:

Final technical rept. Oct 1975-Aug 1976

Corporate Author:

AIR FORCE FLIGHT DYNAMICS LAB WRIGHT-PATTERSON AFB OH

Personal Author(s):

Report Date:

1977-05-01

Pagination or Media Count:

73.0

Abstract:

The traditional power spectral density design procedure is reviewed. The evolution of modeling atmospheric turbulence is traced from the discrete gust to the present continuous representation. The modeling of an aircraft structure as a lumped parameter linear system excited by oscillatory air forces is outlined, and solutions to the resulting equations of motion are indicated. Expressions for the number of exceedances of specified load levels are presented and compared for stationary Gaussian turbulence and for stationary Gaussian patch turbulence. The motivation for modeling atmospheric turbulence as a nonstationary process is addressed, and several models for nonstationary turbulence are reviewed.

Subject Categories:

  • Aircraft
  • Atmospheric Physics
  • Numerical Mathematics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE