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Hello Psubers, after testing 3 different viewport
calculators I am little confused, because it seams that they're giving
different results in failure depth. Obviously I can use the lowest
output in my considerations and even overengineer it. But I wonder
which one of these is closest to the truth... Flat disc, acrylic viewport; Outer diameter: 750 mm Free (viewing) diameter: 600 mm Thickness: 90 mm Analysis resulsts (same material, sea water): Under Pressure v 4.5 - Failure at 393.11 meters Under Pressure v 3.01 (dos) - Failure at 383.1 meters Flat disc calculator (PSUBS site) - Failure at 338 meters Another question: - edges fixed - edges simply supported ... what does it mean? A simple drawing would be nice :) Thank you, regards Darek |