Dynamic Topology Optimization of Long-Span Continuum Structures

Table 1

Fundamental frequency values under different penalty factors and filter radii.

	r = 1.5 m					= 3
	= 2	= 3	= 5	= 7	= 9	r = 1 m	r = 1.2 m	r = 1.5 m	r = 1.8 m	r = 2 m
Before optimization	0.973	0.871	0.746	0.615	0.462	0.871	0.871	0.871	0.871	0.871
The optimized	1.180	1.172	1.159	1.145	1.144	1.180	1.192	1.172	1.159	1.150