Tutorials
Damping
Damping
Properties of Materials: damping.pdf
This tutorial gives the loss factors for aluminum, steel, copper, and
other engineering materials.
Damping Cross-Reference: dcross.pdf
Recommendations
for Revision of Seismic Damping Values in Regulatory Guide 1.61: seismic_damping.pdf
Damping Mechanisms for Microgravity Vibration Isolation: mvi.pdf
The Half Power Bandwidth Method for Damping Calculation: half_power_bandwidth.pdf
Damping Loss Factors for Damping Materials for Continuous Structures: DampLF.pdf
By P. H.
Mathuria and U.P. Kulkarni
NASA, Measurement of Damping of Composite Materials for Turbomachinery
Applications: tm207685.pdf
Free Vibration with Coulomb Damping (Dry Friction Damping): coulomb.pdf
Matlab script: dry.m
H. Cole, On-Line Failure Detection and Damping Measurement of Aerospace
Structures by Random Decrement Signatures, NASA CR-2205
nasa_cr2205_1.doc
nasa_cr2205_2.doc
nasa_cr2205_3.doc
Alternate:
cr2205.pdf
C.
Johnson, Design and Application of Vibration Suppression: vibration_suppression_banner.pdf
Hubert
& Swanson, Surface Tension Lockup in the IMAGE
Nutation Damper - Anomaly and Recovery: 2001_hubert_swanson.pdf
Investigation
of the Structural Damping of a Full-Scale Airplane Wing, by Dwight O.
Fearnow, NACA 2594: aircraft_wing_damping.pdf
Damping
in Aerospace Structures and Components: damping_aerospace.pdf
Damping Coefficient Matrix from Modal Damping for
All Modes: damping_matrix.pdf
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Building
& Bridge Damping
Kijewski
and
Kareem, Analysis of full-scale data from a tall building in Boston:
damping estimates: boston.pdf
Yukio
Tamura, Damping in Buildings, Tokyo Polytechnic University, The 21st
Century Center of Excellence Program: damping_buildings_lecture.pdf
Ji
Young Kim, Dae Young Kim, and Sang Dae Kim, Evaluations of the dynamic
properties for a residential tall building in Korea: Korea_building_damping.pdf
The
London Heathrow Airport new control tower: Heathrow_tower.pdf
Damping
in Tall Buildings and Towers: tall_building_damping.pdf
D.
Taylor: Damper Retrofit of the London Millennium Footbridge- A Case
Study in Biodynamic Design: dt_damper.pdf
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Tuned Mass
& Liquid Dampers
Structures
Incorporating Tuned Mass Dampers: TMD_Table.pdf
Tuned Liquid
Damper:
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Isolation
Tutorials with Matlab Scripts
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Isolation, Other
Avionics
Isolation Design Guidelines: avionics_iso.pdf
Vibration Analysis of an Isolated Mass with Three-degrees-of-freedom.
This includes a method for vertically offset isolators: isolators_threedof.pdf
Notes on Shock
Testing of Isolated Avionics Components: isolator_test_notes.pdf
Notes on Finite
Element Modeling of Isolated Components: FE_isolated.pdf
Machine Mounting
for Vibration Attenuation: machine.pdf
J.S. Lamancusa, Vibration Isolation: vibiso12.pdf
Bronowicki
& Innis, A Family of Full Spacecraft-to-Payload Isolators: 05FW_Bronowicki.pdf
P. Masterson, The
Basics of Vibration Isolation Using Elastomeric Materials: vib_iso.pdf
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Spring Stiffness
and Surge
Spring Stiffness
Table: stiff.pdf
Spring
Surge: spring_surge.pdf
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Structural
Joint Damping
The
Damping Characteristics of Bolted and Welded Joints: bolted_joint_damping.pdf
Smallwood,
Gregory, Coleman, Damping Investigations of Simplified Frictional Shear
Joint: smallwood_1.pdf
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Vibration
Absorbers
Livanos, Raffan,
and Coltrona, Active Control of Vibration in Tall Buildings VibrationTallBuildings.pdf
Wheel and Rail Vibration Absorber Testing and Demonstration: wheel.pdf
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Software
Description
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Executable
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Source
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Damping value
cross-reference includes loss factor, reverberation time, and other
parameters.
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EAR Grommets,
B-434/R-444, B-435/R-445
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This program
performs a curve-fit on an acceleration spectral function resulting
from an applied force.
The main purpose is to determine the damping ratio.
The spectral function may be:
1. acceleration PSD
2. acceleration Fourier magnitude
3. transfer function magnitude (accel/force)
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Calculate
relative displacement from absolute acceleration and vice versa.
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Calculate
isolator static deflection or quasi-static deflection due to rigid-body
acceleration.
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