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eng STABILITY ANALYSIS FOR TRIMARAN PONTOON ARRAY IN WAVE ENERGY CONVERTER – PENDULUM SYSTEM (WEC - PS)
Hantoro, Ridho; Septyaningrum, Erna; Hudaya, Yusuf Rifqi; Utama, I Ketut Aria Pria
Brodogradnja Vol. 73, No. 3, 2022
Ocean waves are a renewable energy source with abundant reserves in Indonesia. With the vast waters of Indonesia, the development of a sea wave power plant needs to be developed. This research focuses on the development of easy-operated and maintained ocean wave converter–pendulum system (OWC – PS). The numerical simulation and experimental analysis were conducted to obtain the relation between the motion response of the pontoon array and its pendulum. The pontoon used is the trimaran type, which consists of a cylindrical pontoon as the main hu...
Hrčak ID: 281056


eng Structural Design of a Composite Trimaran
Plenča, Stipe; Zamarin, Albert
Pomorski zbornik Vol. Special edition, No. 2, 2018
This paper presents a project of a composite trimaran structure, designed and built for competing at the Hydro Contest 2016 competition at Geneva Lake. Concept of the contest is to raise the awareness of tomorrow’s engineers, industrialists, opinion leaders and the public of what is at stake with regard to energy efficiency in the sea transportation of goods and passengers. In addition, to be the laboratory of tomorrow’s boats, particularly enabling the most innovative ideas to be developed in collaboration with the industrial partners. Designe...
Hrčak ID: 199113


eng PREDICTION OF RESIDUAL RESISTANCE OF A TRIMARAN VESSEL BY USING AN ARTIFICIAL NEURAL NETWORK
Yildiz, Burak
Brodogradnja Vol. 73, No. 1, 2022
Trimaran hull forms have been popular recently in both commercial and military usage due to reduction in resistance at high speeds, better stability, and greater deck area compared to conventional monohull vessels. Determination of the location of the side hulls is most critical to get higher hydrodynamic performance. Therefore, many studies in the literature are related to defining the location of the side hulls for trimaran vessels. Most of the studies have been carried out experimentally or numerically. In this study, an artificial neural ne...
Hrčak ID: 272817


eng The Resistance and EEDI Analysis of Trimaran Vessel with and without Axe-bow
Luhulima, Richard Benny; Sutiyo, Sutiyo; Utama, I Ketut Aria Pria
NAŠE MORE Vol. 69, No. 3, 2022
Efforts to reduce emission of toxic gases into the atmosphere by sea transportation have been consistently carried out by the International Maritime Organisation (IMO) since 2009. IMO has introduced a regime known as energy efficiency design index (EEDI) to monitor and quantify the emission of CO2 because of its global climate impact. A comparison was conducted between trimaran hull forms without and with Axe-Bow on the main-hull with S/L=0.3 and 0.4, as well as a comparison with a monohull of comparable displacement. The CFD method was used to...
Hrčak ID: 283854


eng EXPERIMENTAL STUDY ON HEAVE AND PITCH MOTION CHARACTERISTICS OF A WAVE-PIERCING TRIMARAN
Vakilabadi, Karim Akbari; Khedmati, Mohammad Reza; Seif, Mohammad Saeed
Transactions of FAMENA Vol. 38, No. 3, 2014
Dynamic behaviour of a trimaran vessel is investigated in this study. The body of the trimaran is composed of a centre hull with a quite slender wave piercing bow profile (a length-to-width ratio of 12.96) and two outriggers with Wigley mathematical body forms. Several seakeeping tests are conducted on the model of the trimaran vessel in a towing tank in order to study its heave and pitch motions at different Froude numbers of 0.2, 0.37, and 0.51. Generated waves in the towing tank are of regular type with the wave length changing from 0.6 m to...
Hrčak ID: 129609


eng A LID APPROACH FOR PREDICTING WAVE INDUCED MOTIONS OF TRIMARAN IN REGULAR WAVES
Jiang, Zongyu; Gao, Yun; Liu, Jie
Brodogradnja Vol. 70, No. 2, 2019
The wave induced motions of a trimaran sailing in regular head waves were predicted by using the three dimensional boundary integral method. Large wave elevation on the free surface in between the trimaran’s main-hull and the outriggers occurred at some specific frequencies in the numerical model. The large wave elevation also induced large heave and pitch motions of trimaran. However, the large wave elevation and corresponding large motions were not observed during towing tank tests. A lid approach was introduced in this paper by placing lid o...
Hrčak ID: 220207


eng DESIGN AND MODEL TEST OF STRUCTURAL MONITORING AND ASSESSMENT SYSTEM FOR TRIMARAN
Tang, Haoyun; Ren, Huilong; Zhong, Qi
Brodogradnja Vol. 70, No. 2, 2019
Due to the unique structural design of multihull, the structural response on trimaran is often more complex than the response of monohull in navigation. In order to ensure the safety of trimaran navigation and predict the potential damage of local structure, the structure monitoring technology is applied. According to the structural characteristics of trimaran, structural monitoring and assessment system for multihull is designed and introduced in detail, and corresponding model test is taken to demonstrate its effectiveness. The self-propelled...
Hrčak ID: 219694


eng SHORT-TERM PREDICTION AND ANALYSIS OF WAVE-INDUCED MOTION AND LOAD RESPONSES OF A WAVE-PIERCING TRIMARAN
Askarian Khoob, Abolfath; Ketabdari, Mohammad Javad
Brodogradnja Vol. 71, No. 2, 2020
In this paper, we used a statistical short-term analysis in order to determine the wave-induced motions and loads responses of a trimaran ship with three side hull configurations including symmetric, inboard and outboard types. The calculation of these wave-induced loads was carried out using MAESTRO-Wave, a seakeeping analysis code. A rule-based design for the hull was created based on the American Bureau of Shipping (ABS) rules followed by building a global FEM model of the ship with MAESTRO to predict the wave-induced motion and load respons...
Hrčak ID: 240262


eng NONLINEAR ROLLING STABILITY AND CHAOS RESEARCH OF TRIMARAN VESSEL WITH VARIABLE LAY-OUTS IN REGULAR AND IRREGULAR WAVES UNDER WIND LOAD
Zhang, Yihan; Wang, Ping; Liu, Yachong; Hu, Jingfeng
Brodogradnja Vol. 72, No. 3, 2021
The trimaran vessel rolls strongly at low forward speed and may capsize in high sea conditions due to chaos and loss of stability, which is not usually considered in conventional limit-based criteria. In order to perfect the method of measuring roll performance of trimaran, a set of nonlinear roll motion stability analysis method based on Lyapunov and Melnikov theory was established. The nonlinear roll motion equation was constructed by CFD and high-order polynomial fitting method. The wave force threshold of rolling chaos in regular waves is c...
Hrčak ID: 263071