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

Table 7

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

	Mode 1	Mode 2	Mode 3
Volume fraction	0.3	0.3	0.3
Microstructure
Convergence histories
Number of iterations	48	116	44
Computational cost (s)	2367.75	5837.99	2163.63
Effective storage shear modulus (MPa)
Modal loss factor of optimal design	0.0402	0.0416	0.0532