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

Table 5

Topological designs of viscoelastic damping material microstructures with the same volume fraction.

	Mode 2	Mode 3
Volume fraction	0.3	0.3
Microstructure
Convergence histories
Number of iterations	67	56
Computational cost (s)	3324.38	2751.62
Effective storage shear modulus (MPa)
Modal loss factor	0.0525	0.0584