Title

Dynamic Testing Of Materials And Structures With A New Resonance-Vibration Exciter And Controller

Date

1952

Index Abstract

Online

Photo Quality

Complete

Report Number

WADC TR 52-252

Creator

Lazan, B.

Kirmser, P.

Klumpp, J.

Brown, J.

Galinett, A.

Corporate Author

University Of Minnesota; Syracuse University

Laboratory

Materials Laboratory

Extent

44

PB Number

PB116825

NTRL Accession Number

AD006354

Identifier

AD0006354

AD Number

6354

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

AFAL ltr

Distribution Change Action Date

9/16/2002

Distribution Conflict

Fix

Index Price

$2.75

Index In

U.S. Government Research Reports, vol. 23, no. 5, p.167, 5/20/1955

Special Scanning Requirements

`

Abstract

The nature of near-resonance vibration and response characteristics are discussed to clarify the relationships among resonance amplification factor, damping energy and dynamic modulus of elasticity. A newly developed machine is described for exciting and controlling resonance or near resonance vibrations in materials and joints under various types of stress. This machine imposes an adjustable while running mechanical exciting force at a controllable frequency and by means of automatic electronic controls maintains (a) the desired vibration phase angle (usually 900 for resonance) by controlling the frequency of the exciting force, and (b) the desired magnitude of the excited force by automatically controlling the magnitude of the exciting force. Equations are developed for determining the resonance amplification and other properties from the machine readings. The stability and accuracy of the machine are discussed. Data are presented on the damping and elasticity properties of aluminum and mild steel, and these are compared with results procured in rotating cantilever beam equipment. The resonance response, damping, and elasticity properties of a bolted joint were determined and the effects of bolt tension and molybdenum disulfide lubrication are illustrated and partially analysed.

Report Availability

Full text available

Date Issued

1952-02

Provenance

IIT

Type

report

Format

1 online resource