Effects Of Damping Constants And Stress Distribution On The Resonance Response Of Members

Item

Title
Effects Of Damping Constants And Stress Distribution On The Resonance Response Of Members
Date
1953
Index Abstract
Online
Photo Quality
Not Needed
Report Number
WADC TR 52-320
Corporate Author
University Of Minnesota
Laboratory
Materials Laboratory
Extent
13
PB Number
PB116818
NTRL Accession Number
AD003566
Identifier
AD0003566
AD Number
3566
Access Rights
Notice(s)
Distribution Classification
1
Contract
AF 33(038)-18903
DoD Project
None Given
DoD Task
None Given
DTIC Record Exists
Yes
Distribution Change Authority Correspondence
None
Distribution Conflict
No
Index Price
$2.00
Index In
U.S. Government Research Reports, vol. 23, no. 5, p.187-188, 5/20/1955
Abstract
The amplitude of vibration of a member at resonance, as defined by its resonance amplification factor, is analyzed in relationship to the damping properties of materials. Data are presented on damping energy to indicate the effect of stress magnitude, stress history and temperature. Based on the mathematical relationship found to exist between damping and stress magnitude the resonance amplification factors ars determined for a variety of direct stress members and beams. It is shown that the amplification in vibration caused by resonance may be considered to be the product of three basic factors: (a) the mathematical factor, (b) the cross-sectional shape factor, and (c) the longitudinal stress distribution factor. The first of these factors may be calculated from the damping and dynamic modulus properties of the material and the last two from the shape and loading characteristics of the member. Diagrams are presented to show these basic factors as functions of the damping exponent and other variables for members commonly encountered in engineering practice. Experimental data are presented to confirm the equations derived for resonance amplification factors of members having various shapes and stress distribution.
Report Availability
Full text available
Date Issued
1953-12
Provenance
IIT
Type
report
Format
1 online resource
Creator
Lazan, B. J.
Media
WADCTR52-320.pdf