Empirical Correlation of Excitation Environment and Structural Parameters with Flight Vehicle Vibration Response

Item

Title
Empirical Correlation of Excitation Environment and Structural Parameters with Flight Vehicle Vibration Response
Date
1964
Index Abstract
Not Available
Photo Quality
Not Needed
Report Number
AFFDL TR 64-160
Creator
White, R. W.
Bozich, D. J.
Eldred, K. M.
Corporate Author
Northrup Corporation
Laboratory
AF Flight Dynamics Laboratory
Extent
128
Identifier
AD0610482
Access Rights
OTS
Distribution Classification
1
Contract
AF 33(657)-8218
DoD Project
1370
DoD Task
137005
DTIC Record Exists
Yes
Distribution Change Authority Correspondence
None
Distribution Conflict
No
Abstract
The design of fatigue resistant structures for high speed aircraft and aerospace vehicles depends largely on the prediction of realistic acoustic, fluctuating aerodynamic, and engine vibration environments and on the estimation of the attendant vibration levels of structural components and attached equipment. The practical engineering limitations on the mathematical and numerical analyses required to treat such structures rigorously by classical dynamics necessitate studies of alternate, approximate methods. In this report, a definitive statement is presented of the empirical approach for determining correlations between the excitation environment and the vibration response of typical flight vehicle structures by means of statistical analyses of measured vibration data. The various aspects of the vibration prediction problem and the general philosophy motivating research in the area of empirical correlation are discussed. Specific treatment is given to the effects of bandwidth, modal density, and surface pressure spacecorrelation on the crosscorrelation of energy transmitted along various structural transmission paths in complex linear structures. An engineering model for empirical correlation is developed and several examples are given to demonstrate the utility of the equations.
Report Availability
Full text available by request
Date Issued
1964-12
Provenance
Bombardier/Aero
Type
report