Wave Loading Calculator

Calculate wave forces on cylindrical structures using the Morison equation with linear (Airy) wave theory, including drag and inertia components.

Design wave height (m)

Wave period (s)

Water depth (m)

Member diameter (m)

Evaluation depth (m)

Drag coefficient Cd

Inertia coefficient Cm

Seawater density (kg/m³)

Tab to move between fields

Drag force (N/m)

969.92

Inertia force (N/m)

2,008.51

Combined force SRSS (N/m)

2,230.44

Max particle velocity (m/s)1.23

Max particle acceleration (m/s²)0.96

Wavelength (m)96.05

Keulegan-Carpenter number8.17

How to Use This Calculator

Enter design wave height (m), wave period (s), and still water depth (m).
Enter structural member diameter (m) and evaluation depth (m below surface, enter as negative).
Read wave kinematics: horizontal velocity (m/s), acceleration (m/s2), and wavelength (m).
Review inline force (kN/m) from the Morison equation — drag and inertia components.
Use peak force for structural design load cases and compare drag vs. inertia dominance.

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