Marine Hydrodynamics Calculation Excel Template
A Marine Hydrodynamics Calculation Excel Template is a structured spreadsheet tool designed to perform standardized hydrodynamic computations relevant to marine and offshore engineering, such as wave forces, vessel motion responses, added mass, damping coefficients, and resistance estimation. It integrates empirical, semi-empirical, and analytical methods—often aligned with ITTC, DNV, or IMO guidelines—to support preliminary design, performance assessment, and regulatory compliance. The template typically features modular worksheets, input validation, unit conversion, and visual output (e.g., charts of RAOs or wave spectra).
📖 Overview
📑 Key Components
🎯 Applications
- ✓ Preliminary design of offshore platforms and floating wind turbines
- ✓ Vessel seakeeping and operability analysis for mission planning
- ✓ Regulatory compliance checks (e.g., DNV-RP-C205 for environmental loads)
📐 Key Formulas
Morison Equation (In-line Wave Force)
F = 0.5 * ρ * Cd * D * |u| * u + ρ * Ca * π * D² / 4 * du/dt
Computes total in-line hydrodynamic force on a slender cylindrical member due to wave-induced velocity (u) and acceleration (du/dt); includes drag (Cd) and inertia (Ca) components.
ITTC 1957 Standard Ship Resistance Line
C_T = C_F + C_R; C_F = 0.075 / (log10(Rn) − 2)^2; Rn = V * L / ν
Estimates total hull resistance coefficient (C_T) from frictional (C_F) and residual (C_R) components using Reynolds number (Rn), water kinematic viscosity (ν), ship speed (V), and length (L).
Linear Airy Wave Height–Period Relationship
c = √(g * L / (2π)) = g * T / (2π) * tanh(2π * d / L)
Relates phase speed (c), wave period (T), wavelength (L), water depth (d), and gravitational acceleration (g); used to compute dispersion and wave kinematics.