Table 2 Stiffened shell’s geometrical tolerance from selected design codes
Codes | Imperfection tolerance | |
|---|---|---|
Ring-stiffened | Stringer-stiffened | |
DnV [138] | - | \(\overline{w }=0.0015 {l}_{g },\) \(\text{for} {l}_{g}={L}_{s}\) \(\overline{w }=0.0015 {l}_{g },\) \(\text{for} {l}_{g}={L}_{f}\) |
ECCS [25] | \(\overline{u }= 0.01{l}_{r}\), \({l}_{r}=4\sqrt{r{t}_{s}}\) | \(\overline{w }=0.0015{l}_{g }, {l}_{g}=L, \text{for} \frac{{A}_{s}}{bt}\ge 0.06\) \(\overline{w }=0.01{l}_{r }, {l}_{r}=4\sqrt{rt}, \text{for} \frac{{A}_{s}}{bt}\le 0.06\) |
API [81] | \(\overline{w }=0.002{l}_{r }, {l}_{r}={L}_{r}\) | \(\overline{w }=0.002{l}_{g }, {l}_{g}={L}_{s}\) |