Wind Pressure acting on Lower Part of Vessel Calculator

Wind Pressure Formula:

\[ p1 = \frac{Plw}{k1 \times kcoefficient \times h1 \times Do} \]

Wind Load acting on Lower Part of Vessel:

Coefficient depending on Shape Factor:

Coefficient Period of One Cycle of Vibration:

Height of Lower Part of Vessel:

Outside Diameter of Vessel:

Wind Pressure acting on Lower Part of Vessel (Pa):

1. What is Wind Pressure acting on Lower Part of Vessel?

Definition: This is the wind load based on the size, shape and location of the structure, as well as the wind velocity and direction.

Purpose: It helps engineers determine the wind forces acting on the lower part of vessels and structures.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ p1 = \frac{Plw}{k1 \times kcoefficient \times h1 \times Do} \]

Where:

\( p1 \) — Wind Pressure acting on Lower Part of Vessel (Pa)
\( Plw \) — Wind Load acting on Lower Part of Vessel (N)
\( k1 \) — Coefficient depending on Shape Factor (±5%)
\( kcoefficient \) — Coefficient Period of One Cycle of Vibration (±5%)
\( h1 \) — Height of Lower Part of Vessel (m)
\( Do \) — Outside Diameter of Vessel (m)

Explanation: The wind load is divided by the product of shape factor, vibration coefficient, height and diameter to get the wind pressure.

3. Importance of Wind Pressure Calculation

Details: Proper wind pressure estimation ensures structural integrity, safety, and compliance with building codes.

4. Using the Calculator

Tips: Enter all required values with positive numbers. The coefficients typically have ±5% variability.

5. Frequently Asked Questions (FAQ)

Q1: What is the typical range for shape factor coefficient (k1)?
A: The shape factor typically ranges from 0.5 to 1.2 depending on the vessel's shape and surface roughness.

Q2: How is the vibration coefficient determined?
A: It's determined by the mass and stiffness of the vessel, as well as the damping characteristics and excitation frequency.

Q3: Why is height of lower part important?
A: The height affects the moment arm of wind forces and thus the overall pressure distribution.

Q4: How does diameter affect wind pressure?
A: Larger diameter increases the surface area exposed to wind, affecting total load and pressure distribution.

Q5: What units should be used for inputs?
A: Use Newtons (N) for wind load, meters (m) for height and diameter, and dimensionless values for coefficients.