05 - dnvs hull str for ww - hull str - cargo area - intro
TRANSCRIPT
DNV’sHull Structure course for
World Wide Shipping
5 - Hull Structure – cargo areaIntroduction
16.03.2004Slide 2
Contents
1. Introduction
2. Hull structural breakdown – function of hull elements:
• Side
• Bottom
• Deck
• Longitudinal bulkhead
• Transverse bulkhead
• Web frames
16.03.2004Slide 3
Characteristics for Oil tankers Any proposals?
- High number of tanks – good capability of survival - Low freeboard, green seas on deck- Pollution / public attention / fire explosion hazards - Fatigue - Liquid cargo – sloshing in wide tanks and stability aspect - Fully utilizes BM limits hogging/sagging (double hull tankers)
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Single Skin Oil Tanker
- Build up to 1993
Ship data:L = 310mB = 56m
D = 31,4m284,497 DWT
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Single bottom with side ballast tanks
- Built in the 80’s’
Ship data:L = 236mB = 42m
D = 19,2m88,950 DWT
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Double Hull – Two Longitudinal Bulkheads
- Common VLCC design of today
Ship data:L = 320mB = 58m
D = 26,8m298,731 DWT
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Double Hull – CL Longitudinal Bulkhead
- Common Aframax and Suezmax design of today
Ship data:L = 264mB = 48m
D = 23,2m159,681 DWT
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Double Hull – no CL bulkhead
- Older design
Ship data:L = 218mB = 32,2mD = 19,7m
63,765 DWT
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Structural breakdown of hull
-A vessel’s hull can be divided into different hull structuralelements
- Each element has its own function contributing to the integrityof the hull
- In order to assess the structure of an oil tanker, one needs to understand the function of each structural element
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Hull Structural Breakdown
1. SideBottomDeck
Transverse bulkheadLongitudinal bulkheadWeb frames
2.
3.
4.
5.
6.
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Questions ?