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Midship Section of Double Hull Tanker 

Midship Section of Double Hull Tanker 

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Figure 1: Geometry of Y-stiffener 
Figure 2: Midship Section of Double Hull Tanker 
Figure 6: Lighter weight midship section with Y-stiffeners 
Figure 7: Midship section with some Y-stiffeners in the deck structure 
+5 Table 7 : Results for the different case studies of Y-Stiffeners with...
A New Quantitative Fatigue Life Assessment using Alternative Stiffened Panels in Midship Section
Article
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  • Dec 2012
The objective of this work is to estimate the hull girder fatigue life for an unconventionally stiffened midship section stiffened with Y-stiffeners. Specific dimensions of the Y-stiffener are obtained starting from the actual T-stiffener aiming at a higher section modulus whilst at the same time achieving lighter or same weight. Using AutoCAD soft...
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... midship section of the vessel is shown in Figure ...

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... Finally, Bitner-Gregersen et al. (1995) used spectral fatigue to examine the effect of different stiffener types on hull girder strength and consequently fatigue life in the Aframax tanker. On the other hand, Abd El-Kader (2012) and Badran & Abd El-Kader (2012) used the same approach of spectral fatigue assessment but on a beam theory of the overall midship section of an Aframax tanker operated in the red sea. ...
Spectral fatigue analyses comparison study: Suez Canal vs. Cape of Good Hope Arab Academy for Science, Technologies and Maritime Transport (AASTMT)
Article
Full-text available
  • Jan 2019
Suez Canal is one of the shortest navigational routes between east and west. Vessels that transit the Canal should normally save distance, time and operating cost. During the current economic recession and low fuel prices, longer shipping routes may be chosen to avoid the Canal transit fees. Harsh weather conditions may be encountered along these lengthy routes resulting in higher stresses and structural fatigue damage on ship’s hull, which would impact structural safety and affects the cost of ship maintenance. This paper quantifies ship structural fatigue damage along the routes: Suez Canal transit versus the Cape of Good Hope. Several voyages of an Aframax tanker along these routes are selected and evaluated for fatigue damage using a route-specific spectral fatigue damage assessment approach. Fatigue accumulation during the tanker lifetime, for each trade route, is computed as the sum of all the encountered sea states having caused fatigue damage along that route. Results are presented as fatigue damage and fatigue life for each trade route. Results show that in addition to saving in distance and time, less accumulated fatigue is achieved along the Suez Canal route.
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