The sea state characteristics of the wave system in Bonny location in offshore Nigeria is studied... more The sea state characteristics of the wave system in Bonny location in offshore Nigeria is studied. The wave data used in this study covers a duration of 1979 to 1982 and the data was analysed by means of statistical measures mainly focusing on the probability distributions, number of peaks and return cycle for extreme wave condition. Though the data for the study is not sufficiently large, the result of the work identified the Weibull distribution as reasonably appropriate for short term and long term prediction of the extreme wave heights which is relevant to most offshore designs and marine operations. Moreso, there was lack of evidence of low frequency Swell components in this location. Instead, a high frequency wave system with period not exceeding about 10 seconds is noted.
This research is primarily aimed at designing a rudder stock steering gear system that is capable... more This research is primarily aimed at designing a rudder stock steering gear system that is capable of moving the rudder from 35 port to 35 starboard and vice versa under deepest draft and maximum speed. The research involves creating a two ram type hydraulic steering gear system into a 3-D model using solid works. The model is constructed to demonstrate a typical marine rudder system and its application in the vessel. It discusses the modeling process of each component and their working principles.
Journal of Mechanical and Energy Engineering,, 2019
Hydrostatic parameters of a ship are very important in ship design. The importance of
the paramet... more Hydrostatic parameters of a ship are very important in ship design. The importance of the parameters compared to one another need to be revealed in realm of uncertainty, so as to avoid design error. In view of this, a fuzzy-analytical hierarchical process (Fuzzy-AHP) method is utilized in addressing the subject under investigation. The fuzzy logic is used to address uncertainty in pairwise comparison exercise, so as to facilitate the estimation of order of importance of hydrostatic parameters. In this research, the engineering judgements of three designers in analysis of importance of hydrostatic parameters are aggregated and processed using the Fuzzy-AHP methodology. The result produced in the study showed that hydrostatic parameters are importance in order of moments of inertia of vessels (MIV), mass displacement (MD), tons per centimeter immersion (TPCI), coefficients of form (CF), centers of buoyancy (CB), metacentric heights of vessels (MHV), ship waterplane area (SWA), longitudinal center of floatation (LCF), volume displacement (VD) and wetted surface area (WSA) with weight values of 0.218, 0.095, 0.078, 0.083, 0.074, 0.1, 0.46, 0.108, 0.209 and 0.028 respectively.
The sea state characteristics of the wave system in Bonny location in offshore Nigeria is studied... more The sea state characteristics of the wave system in Bonny location in offshore Nigeria is studied. The wave data used in this study covers a duration of 1979 to 1982 and the data was analysed by means of statistical measures mainly focusing on the probability distributions, number of peaks and return cycle for extreme wave condition. Though the data for the study is not sufficiently large, the result of the work identified the Weibull distribution as reasonably appropriate for short term and long term prediction of the extreme wave heights which is relevant to most offshore designs and marine operations. Moreso, there was lack of evidence of low frequency Swell components in this location. Instead, a high frequency wave system with period not exceeding about 10 seconds is noted.
This research is primarily aimed at designing a rudder stock steering gear system that is capable... more This research is primarily aimed at designing a rudder stock steering gear system that is capable of moving the rudder from 35 port to 35 starboard and vice versa under deepest draft and maximum speed. The research involves creating a two ram type hydraulic steering gear system into a 3-D model using solid works. The model is constructed to demonstrate a typical marine rudder system and its application in the vessel. It discusses the modeling process of each component and their working principles.
Journal of Mechanical and Energy Engineering,, 2019
Hydrostatic parameters of a ship are very important in ship design. The importance of
the paramet... more Hydrostatic parameters of a ship are very important in ship design. The importance of the parameters compared to one another need to be revealed in realm of uncertainty, so as to avoid design error. In view of this, a fuzzy-analytical hierarchical process (Fuzzy-AHP) method is utilized in addressing the subject under investigation. The fuzzy logic is used to address uncertainty in pairwise comparison exercise, so as to facilitate the estimation of order of importance of hydrostatic parameters. In this research, the engineering judgements of three designers in analysis of importance of hydrostatic parameters are aggregated and processed using the Fuzzy-AHP methodology. The result produced in the study showed that hydrostatic parameters are importance in order of moments of inertia of vessels (MIV), mass displacement (MD), tons per centimeter immersion (TPCI), coefficients of form (CF), centers of buoyancy (CB), metacentric heights of vessels (MHV), ship waterplane area (SWA), longitudinal center of floatation (LCF), volume displacement (VD) and wetted surface area (WSA) with weight values of 0.218, 0.095, 0.078, 0.083, 0.074, 0.1, 0.46, 0.108, 0.209 and 0.028 respectively.
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Papers by Fabian Idubor
the parameters compared to one another need to be revealed in realm of uncertainty, so as to
avoid design error. In view of this, a fuzzy-analytical hierarchical process (Fuzzy-AHP) method is
utilized in addressing the subject under investigation. The fuzzy logic is used to address
uncertainty in pairwise comparison exercise, so as to facilitate the estimation of order of
importance of hydrostatic parameters. In this research, the engineering judgements of three
designers in analysis of importance of hydrostatic parameters are aggregated and processed using
the Fuzzy-AHP methodology. The result produced in the study showed that hydrostatic
parameters are importance in order of moments of inertia of vessels (MIV), mass displacement
(MD), tons per centimeter immersion (TPCI), coefficients of form (CF), centers of buoyancy
(CB), metacentric heights of vessels (MHV), ship waterplane area (SWA), longitudinal center of
floatation (LCF), volume displacement (VD) and wetted surface area (WSA) with weight values
of 0.218, 0.095, 0.078, 0.083, 0.074, 0.1, 0.46, 0.108, 0.209 and 0.028 respectively.
the parameters compared to one another need to be revealed in realm of uncertainty, so as to
avoid design error. In view of this, a fuzzy-analytical hierarchical process (Fuzzy-AHP) method is
utilized in addressing the subject under investigation. The fuzzy logic is used to address
uncertainty in pairwise comparison exercise, so as to facilitate the estimation of order of
importance of hydrostatic parameters. In this research, the engineering judgements of three
designers in analysis of importance of hydrostatic parameters are aggregated and processed using
the Fuzzy-AHP methodology. The result produced in the study showed that hydrostatic
parameters are importance in order of moments of inertia of vessels (MIV), mass displacement
(MD), tons per centimeter immersion (TPCI), coefficients of form (CF), centers of buoyancy
(CB), metacentric heights of vessels (MHV), ship waterplane area (SWA), longitudinal center of
floatation (LCF), volume displacement (VD) and wetted surface area (WSA) with weight values
of 0.218, 0.095, 0.078, 0.083, 0.074, 0.1, 0.46, 0.108, 0.209 and 0.028 respectively.