Helium injection to reduce resonant frequencies in propellant lines
Gaseous He bubbles injection into liquid propellant launch vehicle fuel lines to reduce vehicle pogo oscillations by lowering feed system natural frequencies
Hanks, B. R.↗
Engineering topics
Stephens, D. G.
Publications and source records attributed to Stephens, D. G..
Aerospace research support of high speed tracked air cushion vehicle program
NASA research studies supporting tracked air cushion vehicle /TACV/ program illustrating aerospace technology application to ground transportation
Stephens, D. G.↗
Heave response of a plenum air cushion including passive and active control concepts
Cushioncraft ground effect machine with heave response and control concepts
Dixon, G. V.↗
The use of helium bubbles as a pogo fix in launch vehicle propellant lines.
Gaseous He bubbles injection into liquid propellant launch vehicle fuel lines to reduce vehicle pogo oscillations by lowering feed system natural frequencies
Hanks, B. R.↗
Improved active vibration isolator
Active vibration isolator simultaneously isolates a flexible structure or payload from disturbances, attenuates the response of a flexible structure to transient disturbances, and maintains the equilibrium position of the payload within predetermined limits over a wide range of steady loads and accelerators.
Dixon, G. V.↗
Flexible ring baffles for damping liquid slosh
Slosh damping, obtained through the use of small, less massive, flexible baffles, provides a relatively lightweight system for damping the motions of liquid propellants in launch vehicles, missiles, and other tankage systems.
Brooks, G. W.↗
Experimental investigation of the effect of model scale on structural-joint damping
Model scale effect on structural joint damping
VIBRATION DAMPING↗
Effectiveness of flexible and rigid ring baffles for damping liquid oscillations in large-scale cylindrical tanks
Effectiveness of lightweight flexible and rigid ring baffles for damping liquid oscillations in large scale cylindrical tanks
LIQUID SLOSHING↗
Simulation and scaling of low-gravity slosh frequencies and damping.
Low gravity slosh simulation parameters and scaling law used to extrapolate data to full scale spacecraft systems
SPACECRAFT STRUCTURE↗
Mechanisms and scaling of damping in a practical structural joint
Joint damping of scaled cantilever beams
DAMPING↗
Effectiveness of external dampers for attenuating launch vehicle oscillations.
External damper effectiveness in attenuating vibration of launch vehicle near launch umbilical tower
LAUNCH VEHICLE↗
Vibrational characteristics of sandwich panels in a reduced-pressure environment
Vibrational characteristics of sandwich panels having aluminum honeycomb and polyurethane foam cores determined over wide range of environmental pressure or density
HONEYCOMB CORE↗
Flexible baffles for slosh damping.
Flexible baffle effect on nature and magnitude of damping and sloshing motions of liquid propellants over wide range of conditions
FUEL TANK↗
Vibration of sandwich panels in a vacuum
Vibrational characteristics of honeycomb and polyurethane foam core sandwich panels over wide pressure range
PANEL↗
The mechanisms and scaling of damping in a practical structural joint
Scaling, clamping pressure, and liquid lubricant effects on damping in practical joint-cantilever beam assembly
Hanks, B. R.↗
Vibration of sandwich panels in a vacuum
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Powell, C. A., Jr.↗
Experimental investigation of liquid impact in a model propellant tank
Liquid impact in booster and space vehicle propellant tank models
SPACE VEHICLE↗
Investigation of air damping of circular and rectangular plates, a cylinder, and a sphere
Air damping mechanisms of circular and rectangular plates, cylinders, and spheres
RECTANGULAR PLATE↗