Figure6

Figure 6. Auto-power spectra and coherence functions of fluctuating wind velocities at P1, P2 and P3. For ease of analysis, the roof is divided into 18 sub-regions (6 sub-regions $$ \times $$ 3 sub-regions) of the same size (36 m $$ \times $$ 30 m) that are sequentially labeled Z1 to Z18. The three representative points on the roof are P1, the center point of sub-region Z9; P2, the center point of sub-region Z10; and P3, the center point of sub-region Z4. (A) Auto-power spectra at P1, P2 and P3; (B) coherence function of P1 and P2; (C) coherence function of P1 and P3; (D) coherence function of P2 and P3