Shape Optimization for Natural Frequency with Isogeometric Kirchhoff-Love Shell and Sensitivity Mapping

Table 3

Built-up shell design, the initial and optimum design variable values, and the structural response.

	design variables	frequency	mass	strain energy
initial	-1,-2,-4,-2,-1,-1,-2,-4,-2,-1,-1,-2,-4	7.7210	2477.0	1.0546
	-2,-1,-1,-2,-4,-2,-1,-1,-2,-4,-2,-1
optimum	3.1609, 7.8490, 10.6005, 7.8490, 3.1609	11.5760	2700.0	8.0
	2.0118, 5.4873, 5.5142, 5.4873, 2.0118
	1.3932, 5.0478, 6.4851, 5.0478, 1.3932
	2.0118, 5.4873, 5.5142, 5.4873, 2.0118
	3.1609, 7.8490, 10.6005, 7.8490, 3.1609