Model loading as per STO-SA-02-003, GOST 31385-2016

PASS/EQUIP → Working with PASS/EQUIP → Data Export and Import → Export of a tank model to Ansys →Model loading as per STO-SA-02-003, GOST 31385-2016

4.4.1.1. Model loading as per STO-SA-02-003, GOST 31385-2016

When selecting the option “Tank loading according to STO-SA-02-003, GOST 31385-2016” in the general data, the model is loaded according to the settings on Fig.1

Fig. 1. Model loading as per STO-SA-02-003, GOST 31385-2016

Option		Description	Note
Wind loads		Wind loads, if specified, are applied to the roof (wind uplift as a constant internal pressure 0.9×p_w×C_e₂ as per [35]) and to the wall (variable pressure diagram in height and in plan 0.9×k×p_w×C_e₁ as per [35])
Snow loads: uniform		The weight load due to snow is applied vertically downwards, taking into account the inclination of the normal to the roof surface: p_s=0.9×p_s₀
Snow loads: non-uniform		The weight load due to snow is applied vertically downwards, taking into account the inclination of the normal to the roof surface, as well as the unevenness factor as per [54]: p_s=0.9×m×p_s₀
Operating		Loading with weight loads, internal vapor pressure and static head of the product: p=r×g×(H-x)+1.2×p_i Wind loads are applied automatically (if any). The weight of the metal is taken in the corroded state. The weight of the attached metal structures and equipment is applied with a coefficient of 0.95. The equipment and metal structures on the wall are applied as a weight load distributed along the circumference.
Empty buckling		External pressure on the wall: p=0.95×1.2×p_v External pressure on the roof: p=0.95×1.2×p_v + 0.95×(1.05×G_r₀+1.3×G_rt)/(p ×r²), where G_rt – roof insulation weight, G_r₀ – roof equipment weight Snow and wind loads are applied optionally.