Structural damping in Saturn vehicles and scale models
Structural damping in Saturn vehicles and scale models of liquid propelled rocket vehicles
Kiefling, L.↗
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Deflection analysis of damped rotors with harmonic support forces
Viscous damping and harmonic disturbing forces in rotors with critical speed, support deflection, and support phase angle determinations
Cavicchi, R. H.↗
Some limitations on the use of damping in short pressure probes
Useful frequency response variations and viscous damping in short pressure probe tubes
Nyland, T. W.↗
The damping effects of viscoelastic materials. II - Transverse vibrations of plates with viscoelastic coatings
Elastic metal thin plates transverse resonant free vibrations, analyzing viscoelastic coatings damping effects
Baumgarten, J. R.↗
The damping effects of viscoelastic materials. I - Transverse vibrations of beams with viscoelastic coatings
Elastic metal thin beams transverse resonant free vibrations, analyzing viscoelastic coatings damping effects
Baumgarten, J. R.↗
Discrete spectra and damped waves in quasilinear theory
Quasi-linear equations consequences in discrete spectra and damped electron plasma waves, discussing conservation laws relation to resonance approximation
Montgomery, D.↗
In defense of modern damping theory in flutter analysis
Defense of damping theory applications in flutter analysis, discussing energy dissipation
Cunningham, H. J.↗
The effect of local modifications on the eigenvalues and eigenvectors of damped linear systems
Discrete linear vibration systems viscous damping local modifications effect on eigenvalues and vectors, using Weissenburgers procedure in matrix form
Pomazal, R. J.↗
Passive damping of the forced precession motion of a two-body satellite
Two-body satellite of axisymmetric rigid bodies interconnected by lossy universal joint, calculating transient oscillation damping of forced precession under external torque
Lim, W. K.↗
An expression for ring-baffle-slosh-damping under reduced gravity conditions
Liquid sloshing in liquid propellant containing orbiting vehicle stabilized by active control system, examining expression for ring baffle slosh damping under reduced gravity
Buchanan, H. J.↗
Effect of damping, time delays, and parameter variations on the stability of a nonconservative system
Nonconservative elastic system involving standard double pendulum model under retarded follower load, calculating damping, time delay and parameter variations effects on stability
Infante, E. F.↗
On the use of control moment gyros for wobble damping of an artificial gravity Skylab
Artificial gravity Skylab wobble damping, using ATM control moment gyros
Curtis, H. S.↗
The effect of support flexibility and damping on the synchronous response of a single-mass flexible rotor
Single mass flexible rotor in elastic bearings mounted on damped flexible supports, analyzing dynamic unbalance response and transient motions
Gunter, E. J.↗
The acoustic damping of a rectangular panel
Acoustic damping of clamped and hinged rectangular panel at natural frequency, noting dependence on aspect ratio
Wallace, C. E.↗
Resonance, particle trapping, and Landau damping in finite amplitude obliquely propagating waves
The equations of motion for a particle in resonance with a small finite amplitude wave are solved approximately, using secularity free perturbation theory. The wave propagates at an arbitrary angle to a uniform background magnetic field in an infinite collisionless plasma. The wave fields include a longitudinal electrostatic component and elliptically polarized transverse electric and magnetic components. The trajectories of trapped and resonant untrapped particles are described, for each of the possible wave-particle resonances. These trajectories are used to construct an estimate of the nonlinear time dependent Landau damping rate of the wave.
Palmadesso, P. J.↗
Experimental damping-in-pitch of two slender cones at Mach 2 and incidences up to 30 deg
Oscillatory experiments were performed on two slender cones at Mach 2 and incidences up to 30 deg, using three different experimental arrangements. The damping-in-pitch was found to remain constant at incidences of up to a value approximately corresponding to the cone semi-angle, after which an almost linear increase with incidence was noted. The results obtained with the different techniques were in very good agreement up to an incidence of 15 deg and in some cases up to 25 deg.
Iyenger, S.↗
Vibration and damping of laminated, composite-material plates including thickness-shear effects
An analytical investigation of sinusoidally forced vibration of laminated, anisotropic plates including bending-stretching coupling, thickness-shear flexibility, all three types of inertia effects, and material damping is presented. In the analysis the effects of thickness-shear deformation are considered by the use of a shear correction factor K, analogous to that used by Mindlin for homogeneous plates. Two entirely different approaches for calculating the thickness-shear factor for a laminate are presented. Numerical examples indicate that the value of K depends on the layer properties and the stacking sequence of the laminate.
Bert, C. W.↗
Cooperation of charges in photosynthetic O2 evolution. II - Damping of flash yield oscillation, deactivation.
A quantitative analysis is made of a linear four-step model for photosynthetic molecular oxygen evolution in which each photochemical trapping center or an associated enzyme cycles through five oxidation states. Based on data obtained with isolated chloroplasts, a number of aspects were considered, including the two perturbations which damp the oscillation of the oxygen flash yield in a flash sequence. The kinetics and the mechanism of deactivation was another aspect investigated.
Forbush, B.↗