Research on subsystem division of statistical energy analysis

Subsystem division will influence the radiation power prediction of underwater structure using statistical energy analysis(SEA).Plate and cylinder are divided into several substructures to evaluate the effect of subsystem division.In sub-plate division,the difference between sub-plate division is less than 0.1 dB above critical frequency.The calculated radiation power will increase with the number of sub-plates,the X2Y2 sub-plate division has 3 dB difference with single plate.In the sub-cylinder division,the peak value will shift to higher frequency as the number of division increases,above 1.6 kHz,a 10 sub-cylinder division in the axial direction has a difference of 1.8～2.6 dB with the single cylinder division.