Nonlinear acoustic theory for rigid porous materials
Development of nonlinear acoustic theory for rigid porous materials and concept of temporal impedance operator
Parrott, T. L.↗
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Kinematics of rigid bodies in spaceflight
Rigid rotating body kinematic equations for use in space flight mechanics
Kane, T. R.↗
Properties of ablation and insulation materials. Volume 2 - Thermal properties of three rigidized fibrous insulators
Thermal conductivity, thermal expansion, and heat capacity determinations for three rigidized fibrous insulators - Vol. 2.
Pears, C. D.↗
Acoustic scattering and absorption by a rigid porous elliptic cylindrical shell
Scattering of plane waves from thin rigid porous elliptic cylindrical shells and Mathieu function
Zorumski, W. E.↗
Influence of boom torsional rigidity and thermally induced torsion on the stability of a semipassive gravity-stabilized satellite
Semipassive gravity-stabilized satellite with yaw oscillations affected by boom torsional rigidity and thermally induced torsion
Merrick, V. K.↗
Experimental investigation of the influence of the turbulent boundary layer on the pressure distribution over a rigid two dimensional wavy wall
Influence of turbulent boundary layer on pressure distribution over rigid two dimensional wavy wall
Beranek, R. G.↗
Certain comments on the application of the method of averaging to the study of the rotational motions of a triaxial rigid body
Averaging technique applied to variational equations describing rotational motions of rigid triaxial body in elliptical orbit
Liu, J. J. F.↗
Lower bounds on deformations of dynamically loaded rigid-plastic continua
Impulsively loaded rigid plastic continua deformation lower bounds calculation, considering beams and plates
Morales, W. J.↗
Photospheric magnetic field rotation - Rigid and differential
Photospheric magnetic field direction autocorrelation showing differential and rigid rotation properties at various heliographic latitudes
Howard, R.↗
Rigidity dependence for Forbush decreases in 1968 compared with that for the 11-year variation
Forbush decreases vertical cutoff rigidity dependence, comparing cosmic ray intensities from Pioneer 8 detector and ground based neutron monitors
Lezniak, J.↗
Stability of free rotation of a rigid body
Rigid body free rotational stability, discussing initial conditions excursion
Vinti, J. P.↗
Implicit rigid body motion in curved finite elements
Rigid body motion implicit representation in curved finite elements
Mebane, P. M.↗
The relative motion of two spheroidal rigid bodies. II
Two spheroid rigid bodies rotational and translational motion, using linear and Hill type differential equations for angular variables and coordinates
Lanzano, P.↗
Measurements of cosmic ray rigidity spectra using a superconducting magnet
Cosmic ray rigidities spectra measurements above geomagnetic cutoff using balloon-borne emulsion plates in superconducting magnet field
Deney, C. L.↗
A look at control law influences on the rigid body bending moments for boost vehicles with various degrees of aerodynamic stability
Space shuttle boost vehicle with various degrees of aerodynamic stability, discussing control laws effects on rigid body bending moment tradeoff
Mowery, D. K.↗
Molecular collisions. XV - Classical limit of the generalized phase shift treatment of rotational excitation- Atom-rigid rotor
Rotationally inelastic molecular collisions in atom rigid rotor scattering, considering infinite order approximation of generalized phase shift treatment
Bernstein, R. B.↗
Theoretical study of corrugated plates: Shear stiffness of a trapezoidally corrugated plate with discrete attachments to a rigid flange at the ends of the corrugations
Analysis and numerical results are presented for the elastic shear stiffness of a corrugated shear web with a certain type of discrete attachments at the ends of the trough lines of the corrugations, namely point attachments to a rigid flange which interferes with the deformations of the end cross sections by preventing downward movement but permitting upward (lifting off) movement. The analysis is based on certain assumed modes of deformation of the cross sections in conjunction with the method of minimum total potential energy and the calculus of variations in order to obtain equations for the manner in which the assumed modes of deformation vary along the length of the corrugation. The numerical results are restricted to the case of equal-width crests and troughs but otherwise apply to a wide variety of geometries. They are in the form of graphs which give the overall shear stiffness as a fraction of the overall shear stiffness that could be obtained by having continuous attachment at the ends of the corrugations.
Hsiao, C.↗
Wind tunnel balance system for determination of wind-induced vibrations of a rigid shuttle model in the launch configuration
A wind tunnel balance system was designed to determine the wind-induced vibrations of a space shuttle model. The balance utilizes a flexible sting mounting in conjunction with a geometrically scaled rigid model. Bending and torsional displacements are determined through strain-gauge-instrumented spring bar mechanisms. The natural frequency of the string-model system can be varied continuously throughout the expected scaled frequency range of the shuttle vehicle while a test is in progress by the use of moveable riders on the spring bar mechanism. Through the use of a frequency analyzer, the output can be used to determine troublesome vibrational frequencies. A dimensional analysis of the wind-induced vibration problem is also presented which suggests a test procedure. In addition a computer program for analytical studies of the forced vibration problem is presented.
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