Fluid-Structure Interaction Effects on the Propulsion of an Flexible Composite Monofin

Table 4

Natural frequencies (Hz) of the fin in the case of 90°/0°/90°/0°/90°.

Oriented fibers	In a water
	90°/0°	1.7	13.3	39.4
90°/0°/90°	1.1	8.7	23.8
90°/0°/90°/0°	2.2	9.5	23.8
90°/0°/90°/0°/90°	1.6	6.8	17.2