Water jet propulsion ship wake quantitative evaluation method based on pulsating pressure

The invention belongs to the field of ship water power, and discloses a pulsating pressure-based water jet propulsion ship wake quantitative evaluation method. Comprising the following steps: 1) acquiring wake field pulsating pressure; 2) acquiring time domain pulsating pressure of a specified position below the water surface; (3) the obtained time domain pulsating pressure is changed into frequency domain pulsating pressure, and the wake pulsating pressure spectrum characteristics of the water jet propulsion ship are obtained; 4) calculating a ship wake characteristic frequency f1 = V0/L; (5) the jet flow frequency f2 = Vj/Dj is calculated; (6) the pulsating pressure amplitude delta p1i (pa) within the frequency band range of 0.9 f1-1.1 f1 is extracted; (7) the pulsating pressure amplitude delta p2i (pa) within the frequency band range of 0.9 f2-1.1 f2 is extracted; and 8) calculating a pressure coefficient # imgabs0 # imgabs1 # based quantitative evaluation method for the wake of the water jet propulsion sh