scholarly journals ANOTHER BLOW ON THE TORN DOWN WALL-THE INCLINING EXPERIMENT

Brodogradnja ◽  
2019 ◽  
Vol 70 (2) ◽  
pp. 135-153
Author(s):  
Selahattin Ozsayan ◽  
◽  
Metin Taylan
Keyword(s):  
Inclining Experiment

The Development and Performance Analysis on Static Experiment System of Ship Models

2013 ◽  
Vol 740 ◽  
pp. 374-381
Author(s):  
Yong Ma ◽  
Shi Zhou You ◽  
Guang Li Zhou ◽  
Liang Zhang
Keyword(s):  
Relative Error ◽  
Standard Error ◽  
Performance Test ◽  
Experimental System ◽  
Vertical Coordinate ◽  
Experiment System ◽  
Ship Model ◽  
Free Decay ◽  
Static Experiment ◽  
Inclining Experiment

To conduct ship model inclining experiments and floating state adjustment experiments, a static experiment system is developed, including research and development of hydrostatic flume, connecting frame, attitude instrument and data acquisition and analysis processing module. And the work principle of the system is discussed. Furthermore, ship model inclining experiment, floating state adjusting experiment, and roll, pitch, heave free decay experiment are conducted to analyse the performance of this system. Results of the experimental indicate that the system has a satisfactory testing precision. In the model inclining experiments, relative error of vertical coordinate of center of gravity of the ship model is 1.5%, relative error of the longitudinal coordinate is 0.18%; in the floating state adjusting experiment, standard error of transverse inclination is 0.06 degree, standard error of longitudinal inclination is 0.03 degree, standard error of heaving measurement is 0.15mm; the free decay experiment proofs that the experiment system can realize dynamic measurement of roll, pitch and heave. This experimental system with high precision has a good application prospect which can be used in ship model inclining experiment, floating state adjusting experiments, as well as model hydraulic performance test study.

Reliability analysis of GM and KG of ships from the inclining experiment

2020 ◽  
Vol 234 (4) ◽  
pp. 803-809
Author(s):  
Metin Taylan
Keyword(s):  
Uncertainty Analysis ◽  
Reliability Analysis ◽  
Confidence Level ◽  
Calculation Procedure ◽  
International Maritime Organization ◽  
Alternative Methods ◽  
Ongoing Debate ◽  
Margin Of Error ◽  
Intact Stability ◽  
Inclining Experiment

It is of paramount importance to determine the lightship characteristics of a newly built vessel correctly. Conventionally, an inclining experiment is performed after the ship is launched in order to determine the lightship GM and in turn KG values. However, there has been an ongoing debate about the validity of the results since it bears some assumptions during the test and calculation procedure. Although the inclining experiment is mandatory by the Intact Stability Code of International Maritime Organization, there emerged various alternative methods recently claiming to reveal better results. In this study, an uncertainty analysis has been carried out on GM and KG values of various sample vessels. Based on the results on the uncertainty analysis, a cumulative margin of error from various sources has been determined within a specified confidence level. Finally, the outcome for the sample vessels was detailed and evaluated in reference to that of the actual inclining experiment reports.

EXPERIMENTAL AND NUMERICAL STUDY ON PROGRESSIVE FLOODING IN FULL-SCALE

2021 ◽  
Vol 152 (A4) ◽  
Author(s):  
P Ruponen ◽  
P Kurvinen ◽  
I Saisto ◽  
J Harras
Keyword(s):  
State Of The Art ◽  
Numerical Study ◽  
Comprehensive Analysis ◽  
Full Scale ◽  
Numerical Results ◽  
Simulation Tool ◽  
Discharge Coefficients ◽  
The Stability ◽  
Inclining Experiment ◽  
Air Compression

A series of full-scale flooding tests was performed with a decommissioned fast attack craft. Various flooding scenarios were investigated and the floating position and progress of the floodwater were carefully measured. Also air compression inside a flooded tank was studied. The results were used to validate a state-of-the-art numerical flooding simulation tool. A comprehensive analysis of the experimental and numerical results is presented. A good correlation is found, especially when the applied permeabilities and discharge coefficients are properly selected. Finally, the stability of the flooded ship was studied by comparing the results of an inclining experiment and calculations with the lost buoyancy method.

scholarly journals Kajian Kecepatan Dan Kestabilan Pada Beberapa Bentuk Kapal Pukat Cincin (Small Purse-Seiner) Di Sulawesi Utara (Study on the boat speed and stability of several Small Purse-seiner in North Sulawesi)

2017 ◽  
Vol 2 (5) ◽  
Author(s):  
Revols D. Ch. Pamikiran ◽  
Frangky E. Kaparang ◽  
Heffry V. Dien
Keyword(s):  
Length Ratio ◽  
Stability Calculation ◽  
International Maritime Organisation ◽  
Experiment System ◽  
North Sulawesi ◽  
Calculation Results ◽  
Speed Stability ◽  
Inclining Experiment ◽  
Resistance Value ◽  
Boat Speed

This study was aimed at analyzing theboat technical characteristics covering shape and size, analyzing the boat speed and stability-related capability, and evaluating the speed and stability values based on the present standard. Boat speed determination was done based on the speed length ratio (SLR), andits valuation was based upon the boat resistance value and the boat thrust estimation. The boat stability determination was based on inclining experiment system and the static and dynamic stability calculation. Results showed that three small pure-seiners from Bitung, Manado, and Molibagu had specific shapes, U-button (Bitung) and Round-Button (Manado and Molibagu). The best boat speed achievement, based on shape, resistance, and thrust, was recorded in Manado boat. All small purse seiners had stable balance condition, but only Manado and Bitung boats met the International Maritime Organisation (IMO) standard. Keywords: Speed, Stability, Purse Seiner, North Sulawesi Abstrak Penelitian ini bertujuan untuk: menganalisis kharakteristik teknis yang mencakup bentuk dan ukuran kapal,menganalisis kemampuan  dalam hal kecepatan dan kestabilan kapal, dan mengevaluasi nilai kecepatan dan kestabilan kapal berdasarkan pada standart yang ada. Penentuan kecepatan kapal dilakukan berdasarkan SLR (speed length ratio), dan penilaiannya dilakukan berdasarkan nilai tahanan kapal dan estimasi daya dorong kapal.Penentuan kestabilan kapal dilakukan berdasarkan teknik momen system (inclining experiment) dan perhitungan stabilitas statis dan dinamis. Hasil penelitian menunjukkan bahwa: Tiga kapal pukat cincin (small pure-seiner) dari daerah Bitung, Manado, dan Molibagu memiliki bentuk yang spesifik yaitu U-button (kapal Bitung) dan Round-Button (kapal Manado dan Molibagu); Capaian kecepatan kapal terbaik berdasarkan bentuk, tahanan, dan daya dorong kapal dicapai oleh kapal dari daerah Manado.Ketiga kapal objeksmall purse seiner memiliki kondisi keseimbangan yang stabil, namun demikian hanya kapal Manado dan Bitung memenuhi standard IMO (International Maritime Organisation). Kata-kata kunci : Kecepatan, Stabilitas, Kapal Pukat Cincin, Sulawesi Utara.

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