Wind Load

Overview

Engineering reference data for Wind Load in mechanics.

Key Formulas

Newton's Second Law

$F = ma$

Force = mass × acceleration.

Work

$W = Fd\cos\theta$

Work = force × displacement × cos(angle).

Kinetic Energy

$E_k = \frac{1}{2}mv^2$

Energy of motion.

Potential Energy

$E_p = mgh$

Gravitational potential energy.

Variables

Wind Load Data Table

Example Calculation: Hurricane Wind Load

A hurricane with a wind speed of 35 m/s acts on a wall with an area of 10 m².

Using the formula: $F_w = \frac{1}{2} \rho v^2 A = \frac{1}{2} (1.2 \, \text{kg/m}^3) (35 \, \text{m/s})^2 (10 \, \text{m}^2) = 7350 \, \text{N} = 7.35 \, \text{kN}$

Using the data table: The wind load per square meter at 35 m/s is 735 N/m². The total force is: $F_w = (735 \, \text{N/m}^2) \times (10 \, \text{m}^2) = 7350 \, \text{N}$

This force is equivalent to the weight of approximately 750 kg.

Practical Notes and Unit Conversions

• Air Density: The calculations above assume a standard air density of ρ = 1.2 kg/m³. Actual density varies with temperature, humidity, and altitude.
• Wind Speed Conversions:
  • 1 m/s = 3.6 km/h
  • 1 m/s = 2.237 mph
  • 1 m/s = 196.85 ft/min
• Pressure Unit Conversions:
  • 1 Pa = 1 N/m²
  • 1 Pa = 1.4504×10⁻⁴ psi (lb/in²)
• Engineering Reality: In practice, wind force on a real object creates more complex effects like aerodynamic drag, lift, and vortex shedding, which are not captured by the simple formula above.

Interactive Charts

References

• Original Source