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Pipe Properties
Lake Tests: L=400 [ft] Temperature range fresh water = 39 to 54 deg F Kinematic viscosity = 1.45e-5 [ft^2/s] Mass per unit length = 0.766 [lb/ft] Mass per unit length / Mass of water displaced by pipe per unit length = 1.313 Submerged wt = 0.1827 [lb/ft] Velocity profile(s) = uniform, 0-3fps Spacing: The placement of the accelerometers is as follows (given in feet from one end): x = 0, 9, 25, 42, 58, 75, 92, 109, 125, 142, 158, 175, 192, 209, 225, 242, 258, 275, 292, 309, 325, 342, 358, 375, 392, 400 ft. The proposed sampling frequency (subject to testing) is: 100 Hz (likely that 80 Hz will have to do) Varying record lengths will be taken, the most common is: 8192 points long Offshore Tests (preliminary design): L=500 ft Temperature salt water = 39 to as high as 85 deg F Kinematic viscosity = 1.26e-5 [ft^2/s] Inertia = 3.994E-06 [ft^4], mass = 0.766 [lb/ft], submerged wt = 0.168 [lb/ft] Velocity profile(s): uniform, 0-3fps & sheared (to be supplied) |
