Doppler Spectral Characteristics of Dynamic Ship Wakes over Nearshore Waters
In response to the long duration and wide range of ship wakes,researching ship wakes for target de-tection has certain significance.This article used linear filtering method combined with Wen's sea spectrum to generate nearshore finite depth sea surface,and overlay it with dynamic Kelvin ship wake to obtain a linear su-perposition model of time-varying nearshore sea surface and upper Kelvin wake.A surface panel scattering field model was used to simulate the Doppler spectrum characteristics of the dynamic Kelvin disturbance near the shore sea surface,with a focus on discussing the Doppler spectrum at different ship speeds,wind speeds,and ship directions for electromagnetic wave incidence angles of 30 degrees and 80 degrees.The numerical calculation results indicated that the operating speed and direction of the ship had a more intuitive impact on the Doppler spectral characteristics of the nearshore sea surface and the dynamic wake superposition model above,while the influence of sea surface wind speed was relatively small.This study provided a reference for extracting motion features of ship wakes in sea clutter environments.
万方数据
维普
