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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Hanging-chain system, which is a form of impact damper, suppresses wind-induced bending oscillations of tall cylindrical antenna masts. A cluster of chains enclosed in a neoprene shroud is suspended inside the tip of the antenna mast, forming a simple method of damping structural vibrations.
Device, containing a tuned series arrangement of two plenum chambers and two orifices, damps high pressure fluid oscillations in a vent valve. Used in conjunction with vent valves, it relieves gas pressure that develops in liquid hydrogen and liquid oxygen tanks used on a space vehicle.
Study analyzes wave motions in prismatic bars with Coulomb damping, using Laplace transforms as an aid in solving the partial differential equations. The results are detailed.
Mechanical damping devices for suppression of combustion oscillations
Damping in two dimensional hydrogen-oxygen combustor
Simulated low gravity sloshing in cylindrical tanks including effects of damping and small liquid depth
Rigidly forced oscillatory dynamic stability method for measuring pitch and yaw damping derivatives in wind tunnels at transonic and supersonic speeds
Damping of piezoelectric quartz crystal driven in torsional mode of vibration in liquid helium 3 and helium 4
Analytical and experimental studies with gyroscopic and parallel damped dynamic vibration absorbers
Oscillation damping of tall structures by hanging chains
Relaxational dislocation damping due to dislocation-dislocation intersections with applications to magnesium single crystals
Basic features and accuracy of dynamic stability technique used in wind tunnels to measure pitch and yaw damping characteristics of aircraft configurations
Scaling, clamping pressure, and liquid lubricant effects on damping in practical joint-cantilever beam assembly
Damping of longitudinal waves traveling in thermoelastic cylindrical rod
Wind tunnel model vibration reduced by use of tuned vibration damping absorber on aircraft model
Static and dynamic elasticity, and viscous damping of laminated and sandwich plates, shells, and beams
Damped elastically supported cantilever beam equation solved for displacement
Stability of equilibrium configuration of linearly elastic solid /with or without internal damping/ subjected to partial follower surface tractions