Fig. 11 | Scientific Reports

Fig. 11

From: Effect of polymeric foam core morphology and orthogrid stiffener design on the noise attenuation of fluid-immersed structures

Fig. 11

Acoustic performance analysis of a periodically stiffened sandwich cylindrical shell with a polymeric foam core under different reinforcement configurations. (a) sound transmission loss for four cases: Case 1 (both inner and outer cylinders reinforced), Case 2 (outer FG cylinder reinforced), Case 3 (inner isotropic cylinder reinforced), and Case 4 (no reinforcement). (b) noise reduction for the same cases.

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