Contrails
The goal of the Contrails project is to help preserve and disseminate the technical record of 20th century aerospace research, highlighting in particular the research endeavors of the Illinois Tech community.

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138 reports

Analysis, Optimization, Fabrication and Test of Composite Shells with Embedded Viscoelastic Layers

Author(s): Bronowicki, Allen J.
Corporate Author: TRW Space & Technology Group
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume II p. GCA-1
full text available

Modal Damping of Suspended Cables

Author(s): Yamaguchi, Hiroki
Corporate Author: Saitama University
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume II p. GBC-1
full text available

Effect of Inertial Forces on Damping in a Dry Friction Joint

Author(s): Vinogradov, O.
Corporate Author: University of Calgary
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume II p. GBB-1
full text available

Contact Stresses in Cables due to Tension and Torsion

Author(s): Kumar, Krishna
Corporate Author: IIT, Kanpur; Auburn University
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume II p. GBA-1
full text available

Tuned Liquid Damper (TLD) for Suppressing Horizontal Motion of Structures

Author(s): Fujino, Yozo
Corporate Author: University of Tokyo
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume II p. GAC-1
full text available

A New Class of Fluid-Loop Dampers

Author(s): Baz, A.
Corporate Author: Catholic University; NASA - Goddard Space Flight Center
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume II p. GAB-1
full text available

Fluid Inertia in Squeeze Film Dampers

Author(s): El-Shafei, A.
Corporate Author: University of South Florida
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume II p. GAA-1
full text available

Non-Linear Dynamic Analysis with Frequency Dependent Damping

Author(s): Venancio-Filho, V
Corporate Author: Federal University of Rio de Janeiro; Federal university of Ouro Preto
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume II p. FDD-1
full text available

Distributed Parameter Nonlinear Damping Models for Flight Structures

Author(s): Balakrishnan, A. V.
Corporate Author: UCLA; NASA Langley Flight Research Center
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume II p. FDC-1
full text available

The Role of Damping in the Suppression of Parametric Resonances in Nonlinear Systems

Author(s): Zavodney, Lawrence D.
Corporate Author: Ohio State University
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume II p. FDB-1
full text available

Effect of Damping on the Predicted Fatigue Life of a Nonlinear Plate

Author(s): Miles, R. N.
Corporate Author: State University of New York, Binghampton
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume II p. FDA-1
full text available

Optimization of Energy Dissipation Rate in Structures

Author(s): Neubert, Vernon H.
Corporate Author: Pennsylvania State University
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume II p. FCD-1
full text available

Optimum Selection of Dampers for Freely Vibrating Multidegree of Freedom Systems

Author(s): Gilheany, John J.
Corporate Author: Catjholic University of America
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume II p. FCC-1
full text available

Robust Realization/Identification of Damped Structures

Author(s): Roemer, Michael J.
Corporate Author: State University of New York at Buffalo
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume II p. FCB-1
full text available

Active Vibration Control of Flexible Structures

Author(s): Sun, S. P.
Corporate Author: Auburn University
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume II p. FCA-1
full text available

An Internal Damping Configuration for Tubes and Hollow Panels

Author(s): Kerwin, Jr, Edward M.
Corporate Author: BBN Systems and Technologies Corporation
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume II p. FBD-1
full text available

Optimal Application of Damping to the Stanford Gravity Wave Experiment

Author(s): McLaughlin, Frank A.
Corporate Author: Stanford University
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume II p. FBA-1
full text available

Complex Modulus Measurements over a Wide Range of Frequencies and Material Characteristics through the Confrontation of Two Instruments

Author(s): Chesneau, Chris
Corporate Author: Metravib R.D.S.; I.N.S.A.; Indikon - Metratvib Instruments Inc.
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume II p. FAD-1
full text available

Frequency-Temperature Dependence of Polymer Complex Modulus Properties

Author(s): Lewis, Tom
Corporate Author: Anatrol Corporation; Materials Laboratory
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume II p. FAC-1
full text available

Comparison of Complex Modulus Data Generated by Three Different Measurement Techniques

Author(s): Drake, Michael L.
Corporate Author: University of Dayton Research Institute
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume II p. FAB-1
full text available

Interactive Characterization and Database Storage of Complex Modulus Data

Author(s): Fowler, Bryce L.
Corporate Author: CSA Engineering, Inc.
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume II p. FAA-1
full text available

Damping - A Key to More, Faster, Farther, Higher (Keynote Address)

Author(s): Ferguson, Thomas R., Jr.
Corporate Author: Headquarters Air Force Systems Command
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume II p. AAA-1
full text available

Description of Structural Damping

Author(s): Gaul, L.
Corporate Author: University of the Federal Armed Forces Hamburg
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume I p. DCD-1
full text available

Vibration Damping Performance - What We Should Know About It

Author(s): Chahine, John
Corporate Author: Kolano and Saha Engineers, Inc.
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume I p. DCC-1
full text available

On Passsive Spot Damping Anomalies

Author(s): Young, Maurice I.
Corporate Author: Vigyan Research Associates, Inc.
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume I p. DCB-1
full text available

Considerations of Synthesized System Damping in Dynamic Analysis of Space Structures

Author(s): Tsai, Wan T.
Corporate Author: Rockwell International
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume I p. DBE-1
full text available

Optimized Designs of Viscoelastic Damping Treatments

Author(s): Gibson, Warren C.
Corporate Author: CSA Engineering
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume I p. DBD-1
full text available

Hydrostatic Damper for the Space Shuttle Main Engine (SSME) High Prressure Oxidizer Turbopump (HPOTP)

Author(s): Goggin, David G.
Corporate Author: Rockwell International
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume I p. DBC-1
full text available

Constrained Layer Damping for a Space-Based Optical System

Author(s): Bond, Naneen C.
Corporate Author: McDonnell Douglas Missile System Company
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume I p. DBB-1
full text available

A Viscous Isolator for Shuttle Hubble Space Telescope Resupply

Author(s): Davis, Porter
Corporate Author: Honywell, Inc.
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume I p. DBA-1
full text available

Study of the Rheology of an Elastic Medium Through the Splitting of its Eigenfrequencies

Author(s): Caputo, Michele
Corporate Author: Universita "La Sapienza", Roma
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume I p. DAD-1
full text available

Improved Solution Techniques for the Eigenstructure of Fractional Order Systems

Author(s): Gaudreault, Michele
Corporate Author: Air Force Institute of Technology
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume I p. DAC-1
full text available

The Fractional Order State Equations for the Control of Viscoelastically Damped Structures

Author(s): Bagley, R. L.
Corporate Author: Air Force Institute of Technology
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume I p. DAB-1
full text available

The Fractional Order Estimator (To be published, AIAA J. Guidance Control and Dynamics)

Author(s): Bagley, R.
Corporate Author: Air Force Institute of Technology
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume I p. DAA-1
full text available

Formulation and Inversion of Transfer Functions of Combined Elastic/Viscoelastic Structures

Author(s): Skaar, S. B.
Corporate Author: Iowa State University
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume I p. CCC-1
full text available

Application of the Ritz Procedure to Damping Prediction Using a Modal Strain Energy Approach

Author(s): Parekh, Jatin C.
Corporate Author: Anamet Laboratories, Inc.
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume I p. CCB-1
full text available

Passive Damping Design Methods Using Nastran

Author(s): Matla, Michael J.
Corporate Author: Eastman Kodak Company
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume I p. CCA-1
full text available

Coupled Modes Resolution by an Exponential Window

Author(s): Agneni, A.
Corporate Author: Universita di Roma
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume I p. CBC-1
full text available

An Alternative to FFT For Precise Damping Estimates

Author(s): Pandit, Sudhakar M.
Corporate Author: Michigan Technological University
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume I p. CBB-1
full text available

Identification of System Parameters in a Slewing Control Experiment

Author(s): Garcia, Ephrahim
Corporate Author: State University of New York at Buffalo
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume I p. CBA-1
full text available

An Experimental Investigation on the Active-Damping Characteristics of a Class of Ultra-Advanced Intelligent Composite Materials Featuring Electro-Rheological Fluids

Author(s): Choi, S. B.
Corporate Author: Michigan State University
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume I p. CAC-1
full text available

Analysis of a Modified Passive Hydraulic Damper with Variable Damping Characteristics

Author(s): Su, Hong
Corporate Author: Concoria University
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume I p. CAB-1
full text available

The Usage of Electrorheological Materials in Viscoelastic Layer Damping Applications

Author(s): Coulter, John P.
Corporate Author: Lord Coporation
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume I p. CAA-1
full text available

Measured Damping and Modulus of Composite Cylinders

Author(s): Andriulli, J. B.
Corporate Author: Oak Ridge National Laboratory
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume I p. BCC-1
full text available

Highly Damped GR/MG Composites for Flexible Space Structures

Author(s): Kashalikar, Uday
Corporate Author: Foster-Miller, Inc.
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume I p. BCB-1
full text available

(Abstract) Damping in Metal Matrix Composites - An Overview

Author(s): Rawal, S. P.
Corporate Author: Matine Marietta Space Systems; Office of Naval Research
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume I p. BCA-1
full text available

Status of Aircraft Integral Damping Demonstration

Author(s): Rupert, Carl. L.
Corporate Author: LTV-APG/MAD
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume I p. BBC-1
full text available

Deveopment of a Damped A-10 Engine Air Inlet Ring

Author(s): Giunto, David L.
Corporate Author: LTV Aircraft Products Group
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume I p. BBB-1
full text available

Loss Modulus and Damping Behavior of Poly (Vinyl Methyl Ether)-Polystyrene Blends and IPN's

Author(s): Fay, J. J.
Corporate Author: Lehigh University
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume I p. BAA-1
full text available

An Aircraft Modal Suppression Yaw Damper System (Invited Speaker)

Author(s): Fuller, J. R.
Corporate Author: Boeing Commercial Airplanes
Laboratory: Flight Dynamics Laboratory
Date of Publication: 1989-11
Report Number: WRDC-TR-89-3116 Volume I p. AAC-1
full text available