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

Table 8

Topological designs of viscoelastic damping material microstructures for maximizing modal loss factors with different volume fractions.

	Mode 1	Mode 2	Mode 3
Volume fraction	0.2	0.8	0.6
Microstructure
Convergence histories
Number of iterations	40	43	41
Computational cost (s)	2046.78	2352.25	2152.28
Effective storage shear modulus (MPa)
Modal loss factor of optimal design	0.0492	0.0524	0.0590
Modal loss factor of traditional design	0.0189	0.0516	0.0564