CB*/Z 301-1980 Calculation of wind pressure on ships

CB*/Z 301-1980 Ship wind pressure calculation CB*/Z301-1980 Standard download decompression password: www.bzxz.net

National Technical Committee for Ship Standardization
Guiding Technical Documents
Ship Wind Pressure Calculation
1. Symbol Definition
L: Total length of ship, m,
B: Ship width, m;
Side projection area of ​​the part above the waterline of the ship, m2; A
Z: The height of the centroid of the side projection surface A from the waterline, m; V: Wind speed corresponding to the centroid of the side projection surface, m/s; P: Air density, kg·s2/mt;
Cm: Wind pressure heeling moment system;
Mp: Wind pressure heeling moment relative to the waterline, kg·m. 2. Calculation of wind pressure for river ships
ov\Az kg·m
Mp=Cm·
Where:
Cm=0.453+1.48-
CB*/Z301-80
Replace CBZ301-77
For ships without side walls between two decks, without deckhouses or with only partial deckhouses, this formula should not be used for calculation. 3. Calculation of wind pressure for seagoing ships
Mp=Cm·pV\AZ
Where:
This method is applicable to the calculation of wind pressure for various types of transport ships at sea. BL
4. The wind speed V at different heights of the sea surface shall be selected from the table below or determined by interpolation according to the maximum wind speed Vmax of the navigation area designed for the ship. Height above sea level
V/Vmax
Relative wind speed
National Technical Committee for Ship Standardization
Approved on December 30, 1980
Drafted by Wuhan Institute of Water Transport Engineering
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National Technical Committee for Ship Standardization
Guiding Technical Documents
Ship Wind Pressure Calculation
1. Symbol Definition
L: Total length of ship, m,
B: Ship width, m;
A: Side projection area of ​​the part above the waterline of the ship, m2; Z: The height of the centroid of the side projection surface A from the waterline, m; V: Wind speed corresponding to the centroid of the side projection surface, m/ssp: Air density, kg·s2/m\;
Cm: Wind pressure heeling moment system;
Mp: Wind pressure heeling moment relative to the waterline, kg·m. 2. Calculation of wind pressure for river ships
-pV2AZkg·m
Cm = 0. 453+ 1.48 Z
Where:
CB*/Z301-80
Replaces CB／Z301—77
For ships without side walls between two decks, without deckhouses or with only partial deckhouses, this formula should not be used for calculation. 3. Calculation of wind pressure for seagoing ships
Where:
Cm=0.15.4
This method is applicable to the calculation of wind pressure for various types of transport ships at sea. 4. The wind speed V at different heights of the sea surface shall be selected from the table below or determined by interpolation according to the maximum wind speed Vmax in the navigation area designed for the ship. Height from sea surface
Relative wind speed
V/Vmax
Issued by the National Technical Committee for Ship Standardization
Approved on December 30, 1980bzxZ.net
Drafted by Wuhan Water Transport Engineering College
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