Evaluation of the Hydrodynamic Performance of Planing Boat with Trim Tab and Interceptor and Its Optimization Using Genetic Algorithm

Sakaki, Abdollah; Ghassemi, Hassan; Keyvani, Shayan

doi:10.1007/s11804-018-0040-6

Cited by 14 publications

(6 citation statements)

References 18 publications

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“…Turning to research issues related to the solution quality and diversity improvement, attention will be paid on the implementation of a more robust diversity preventing strategy. To that purpose, special new exploration/exploitation schemes borrowed from both evolutionary computation and metaheuristics fields will be implemented and incorporated into the proposed GA (see for example the works of [32,33].…”

Section: Discussionmentioning

confidence: 99%

Ship Routing Using Genetic Algorithms

Charalambopoulos

Nearchou

2021

SN Oper. Res. Forum

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Section: Discussionmentioning

confidence: 99%

Ship Routing Using Genetic Algorithms

Charalambopoulos

Nearchou

2021

SN Oper. Res. Forum

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“…Interceptors, flaps, and trim-tabs are three other appendages that can be mounted on the aft of planing hulls to enhance running attitudes of a boat. Sakaki et al (2018) employed an optimization algorithm for designing interceptors and flaps for planing hulls in an optimized way. Suneela et al (2021) investigated how a hybrid interceptor-flap system differently changes the performane of a planing hull than an interceptor at the stern of the vessel.…”

Section: Introductionmentioning

confidence: 99%

Singular and Simultaneous Effects of Step and Stern Wedge on High-speed Craft Behavior in Irregular Waves: Experimental and Statistical Assessment

Ghadimi,

Sajedi,

Ghadimi

2024

Preprint

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In the design process of high-speed craft, the motions and exerting acceleration on the craft in waves are of great importance. Due to the relatively small size of this type of vessel, they incur more intensive motions and higher accelerations in the presence of waves. In the current study, the behavior of five configurations of baseline, wedge-mounted, single-stepped, wedge-mounted single-stepped and double-stepped planing hulls in irregular waves were experimentally studied. All models have a length of 2.6 m, a beam of 55 cm, and weigh 86 kg. The considered irregular wave was generated using the JONSWAP spectrum and had a characteristic height of 12 cm and a peak period of 1.6 s. These models were towed at Froude numbers ranging from 2.15 to 3.44. The analysis of heave and pitch motions of these models demonstrated that simultaneous use of a single-step and a stern wedge can reduce the heave and pitch double-amplitudes of the planing hull up to 33% and 60%, respectively. That’s while, the double-stepped model was the least successful model in heave and pitch motions reduction, by a maximum of 27% and 18% reduction for heave and pitch motions, respectively. Regarding the acceleration of these vessels, the wedge-mounted single-stepped hull experienced 34% and 16% lower accelerations in its center of gravity and bow than what the baseline model experienced. However, using two steps could only reduce these two types of acceleration by 10% and 4%, respectively.

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“…They stated that the height of the interceptor should be between 0.1 and 0.6 times the boundary layer thickness at the stern of the planing boat. Sakaki et al [23] evaluated the hydrodynamic performance of a boat with a trim tab and interceptor attachment using a genetic algorithm (GA). In their study, they generated planing boats with a trim tab and an interceptor by using Savitsky's equations with GA. Optimization by changing the deadrise angle showed that the total resistance decreased at different deadrise angles.…”

Section: Introductionmentioning

confidence: 99%

Untitled

2023

brod

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Nowadays, interceptors are often used to decrease total resistance and enhance comfort by reducing dynamic trim for high-speed planing vessels. They can be controlled manually as well as automatically by using a suitable closed-loop control system. Thus, in the present study, an automatically controllable system is presented to minimize the total resistance by reducing the dynamic trim in calm water. To reach this aim, a mathematical model which can represent the 2 degree of freedom vertical motion of a prismatic planing vessel is presented. The coefficients used in the model are calculated by using the Savitsky method. The standard dynamic trim angle and the optimum ones in terms of resistance are calculated by using the same method. For control action, a linear full state feedback control strategy (linear quadratic regulator) is applied, and instantaneous blade heights are found considering the change in forward speed. Therefore, the control-oriented model is able to change the blade height to reach the optimum trim angle in terms of the total resistance of the vessel for different forward speeds and speed profiles. The results show that the designed linear quadratic regulator control strategy is successful for reference trim tracking problems.

show abstract

Evaluation of the Hydrodynamic Performance of Planing Boat with Trim Tab and Interceptor and Its Optimization Using Genetic Algorithm

Cited by 14 publications

References 18 publications

Ship Routing Using Genetic Algorithms

Ship Routing Using Genetic Algorithms

Singular and Simultaneous Effects of Step and Stern Wedge on High-speed Craft Behavior in Irregular Waves: Experimental and Statistical Assessment

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