The cross-sectional forms of SFT are significant control indicators, with wave load being a primary control factor. As wave height increases and wave period decreases, the pressure amplitude and pressure difference values for all three cross-section types (circular, elliptical, and octagonal) rise correspondingly, showing enhanced variation characteristics. The ranking for pressure distribution uniformity is circular > elliptical ≈ octagonal; for absolute pressure value, the order is circular > octagonal > elliptical; and for pressure difference, the order is elliptical > octagonal > circular.