An Optimization Method for Maximizing the Low Frequency Sound Insulation of Plate Structures

Table 2

Known parameters and optimization of Case 1.

(a)

Known; parameters	Density	Young’s modulus	Poisson’s ratio	Damping factor	Lx	Ly	h
	7800kg/m^3	216GPa	0.28	0.01	1m	1m	12mm

(b)

Constraints	Edge No.	1		2		3		4
	Boundary parameter
	Variable Range			0~10^4	0~10^3	0~10^4	0~10^3

(c)

Target	Maximize
Results	Optimal Boundary condition	,
	Optimal	45dB

Note: for comparison, the results of the same plate with two classic boundary conditions, SSSS (simply supported on all edges) and CCCC (clamped on all edges), are 35 dB and 37 dB, respectively.

(d)

Target	Maximize
Results	Optimal Boundary condition	,
	Optimal	42dB

Note: for comparison, the results of the same plate with two classic boundary conditions, SSSS (simply supported on all edges) and CCCC (clamped on all edges), are 33 dB and 34 dB, respectively.