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

Table 3

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

Oriented fibers	In vacuum
	90°/0°	12.6	73.5	158.4
90°/0°/90°	9.5	51.3	105.5
90°/0°/90°/0°	22.1	56.2	115.5
90°/0°/90°/0°/90°	17.4	44.8	91.6