Effect of boundary conditions on the damping characteristics of a randomly excited cast nickel-aluminum bronze specimen at low stress levels.
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Authors
Knouse, Stephen T.
Subjects
material damping
modal analysis
boundary conditions
low stress level high frequency measurement
modal analysis
boundary conditions
low stress level high frequency measurement
Advisors
Shin, Young S.
Date of Issue
1984-03
Date
March 1984
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
This research examines how various specimen support
arrangements affect a material's damping characteristics.
The 74 lb. sample studied is cast nickel-aluminum bronze and
measures 19.8 x 13.65 x 1 inches. Using previously documented
Naval Postgraduate School research, desired random vibration
analysis has been verified by impulse hammer techniques.
Input excitation is provided by a combination piezoelectric-electromagnetic
vibration generator system and response is
recorded through the use of piezoelectric accelerometers . The
frequency range studied varies from 100 Hertz to 12,500 Hertz.
The vibration generator is threaded into the specimen and the
accelerometers are attached to the machined surface of the
sample with a cyanoacrylate adhesive. Boundary support
conditions include various: foam, bolted and shock-chord
configurations.
Type
Thesis
Description
Series/Report No
Department
Mechanical Engineering
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.