Showing papers on "Shell balance published in 1972"

Stresses Emanating From the Supports of a Cylindrical Shell Produced by a Lateral Pressure Pulse

Abstract: A semi-infinite, elastic, circular cylindrical shell is subjected to two uniform, radial pressure pulses, one a step pulse and the other a short-duration, rectangular pulse Solutions for the stresses emanating from both a clamped support and a simple support are presented for a Timoshenko-type shell theory and a shell bending theory Results from the Timoshenko-type theory are obtained using the method of characteristics, and results from the shell bending theory are obtained using integral transform techniques Numerical results from both shell theories are presented for the bending stress and the shear stress resultant Results show that the effects of rotary inertia and shear deformation are important only in the vicinity of the wave fronts However, if the duration of the pressure pulse is short, maximum stresses can occur in the vicinity of the wave fronts where a Timoshenko-type shell theory is required for realistic response predictions

Mass Transport in Water Waves. Part I. Theory. Part II. Experiments.

Abstract: : When a fluid is in periodic wave motion, the particles are carried by a varying velocity field The location of a particle varies as does the immediate velocity field Fluid particles may have a net mean drift even if the local velocity field has zero mean; this is the case in irrotational gravity waves In viscous fluid, wave-induced Reynolds stress imparts steady momentum to the fluid; a steady shear is the set up to balance it, hence a further mean velocity field results The sum of these two steady currents provides the total drift by which a fluid particle migrates, ie mass transport velocity This report is a description of theoretical and experimental aspects of mass transport by waves Part I reviews basic assumptions of existing theories Part II checks and evaluates theoretical deductions in Part I (Author)