Table 6.

Optimization results, x⁎ (in millimeters).

x⁎
M	USP	SWI	SW
$[t_p]$	$[t_p,t_s,w_s,h_s]$	$[t_p,w_{ci},t_{sci},w_{fix},t_{sfix},w_{free},t_{sfree}]$	$[t_p,t_s]$
$u\le 0.1$ [mm]
[8.0]	$[0.36,1.1,150.0,80.0]$	-	$[0.53,21.0]$
	7 stiffeners in simulation ($n{o}_{stiffeners}=ceil(a/w_s)$)	$w_{ci}\to platewidth$$ThusSWI-SW$ Optimization discontinued. (Refer to design strategy SW.)
$u\le .01$ [mm]
[59.7]	$[0.17,9.2,100.0,260.0]$	-	$[1.1,41.0]$
	10 stiffeners in simulation	see SW
$u\le .001$ [mm]
[194.0]	$[0.18,20.0,300.0,350.0]$	-	$[14.7,140.0]$
	3 stiffeners in simulation		For $u=0.003$.
	Several alternative design solutions exist - Here, the design strategy using less stiffeners is used to minimize production cost	see SW	For x⁎ when $u<0.003$ only skin thickness increases. $ThusSW\to M$ Optimization discontinued
$K_T\ge 1400$ [$\frac{Nm}{\varphi }$]
[40.0]	$[0.28,35.6,1500,400]$	$[5.0,1400,5.0,170,26.5,19.0,20.0]$	$[1.7,54.0]$
	2 stiffeners in simulation
$K_T\ge 7000$ [$\frac{Nm}{\varphi }$]
[69.0]	$[5.4,69.0,180,80.0]$	$[4.7,1200,20.0,170,33.0,13.0,40.0]$	$[2.0,110.0]$
	17 stiffeners in simulation
$K_T\ge 14000$ [$\frac{Nm}{\varphi }$]
[83.0]	$[1.4,85.0,200,100]$	$[25.0,1340,17.0,2150,12.0,12.0,130]$	$[2.3,156.0]$
	15 stiffeners in simulation