. Deep ocean power systems. Electric power distribution; Hydroelectric power plants. P^b = critical buckling pressure, psi Pj,y = critical yielding pressure, psi Ri_o = local outside radius of a spherical shell, in. a = yield stress, psi The equations governing the collapse of cylinder shells are considerably more complex than for spheres. A method developed by General Dynamics* was used to analyze the collapse by yielding of a cylinder and hemispherical cylinder heads. This method calculates outer fiber, midfiber, and inner fiber stresses at frames and midbay as well as deflections and local
. Deep ocean power systems. Electric power distribution; Hydroelectric power plants. P^b = critical buckling pressure, psi Pj,y = critical yielding pressure, psi Ri_o = local outside radius of a spherical shell, in. a = yield stress, psi The equations governing the collapse of cylinder shells are considerably more complex than for spheres. A method developed by General Dynamics* was used to analyze the collapse by yielding of a cylinder and hemispherical cylinder heads. This method calculates outer fiber, midfiber, and inner fiber stresses at frames and midbay as well as deflections and local stresses. Computations were made for two types of collapse of a cylinder by buckling. Lobar buckling was approximated by E (1 - m") ^ Pk = Buckling by instability was approximated by ,4 Pk = Eh a W 1 +. where P^, = lobar buckling, psi E = modulus of elasticity h = shell thickness, in. a = nominal outside shell radius, in. M = Poisson's ratio n = number of lobes m = a/L L = effective length of cylinder, in. 1 = moment of inertia of shell frame R = radius of frame-shell section, in. General Dynamics, Electrical Boat Division. "Circular Cylindrical Shell with Bulkheads and Intermediate Stiffeners Subjected to Hydrostatic ; 22. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Giorgi, E. Port Hueneme, Calif. , Naval Civil Engineering Laboratory
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