Time-Frequency Characteristics of Fluctuating Pressure on the Bottom of the Stilling Basin with Step-Down Floor Based on Hilbert–Huang Transform

Figure 6

Marginal spectra of characteristic points: (a) Q = 30 m³/s; (b) Q = 50 m³/s; (c) Q = 70 m³/s; (d) Q = 90 m³/s.

(a)

(b)

(c)

(d)