Updated shell stability calculation methods suggested for a new edition of RMRS Rules
The paper provides suggestions on update of hull stability calculation methods for submersibles used in RMRS Rules. It derives updated relationships for calculating corrections to theoretical critical buckling pressure for a spherical shell and to global buckling of a reinforced cylindrical compartment. Updated formulas are verified by comparison of results versus numerical calculation data. The paper shows that suggested relationships correlate well with numerical calculations within the entire range of probable design parameters and offer sufficiently reliable assessment of actual critical pressure on shells of submersibles.