Microstructural Topology Optimization of Constrained Layer Damping on Plates for Maximum Modal Loss Factor of Macrostructures

Table 6

Topological designs of viscoelastic damping material microstructures with different volume fractions.

	Mode 1	Mode 2	Mode 3
Volume fraction	0.3	0.5	0.6
Microstructure
Convergence histories
Number of iterations	57	80	44
Computational cost (s)	2809.80	3952.76	2181.87
Effective storage shear modulus (MPa)
Modal loss factor of optimal design	0.0648	0.0561	0.0650
Modal loss factor of traditional design	0.0437	0.0489	0.0610