Pereslegin S.V., Levchenko D.G., Karpov I.O.
The problem of wave excitation on the water surface from a stationary oscillating underwater source is considered in connection with the problem of remote detection of such sources. It is shown that the attenuation of the pulse of the source with depth can be largely compensated by the waves parametric excitation of the gravitational-capillary range, that is important for radar sensing of sea surface. Threshold generating the amplitude of surface wave ξ0 ~ 10–2 сm, according to the model. The maximum amplitude is in the center of the gravitational-capillary region at the length of the generating gravitational-capillary wave L0 = 1.74 сm. The generating region shifts when the frequency of the vibrator changes, and the most effective case is when the frequency of the vibrator is doubled in relation to the frequency of the excited wave F0 =13.5 Hz. The obtained model results are important for problems related to sea surface radar. A laboratory experimental installation has been created, the measurements of electromagnetic waves scattering from the area of circular waves around the vibrating membrane (“Faraday ripples”) are conducted. Perspectives of these effects using for detect of low-frequency seismic sources, and its radar monitoring.
