scholarly journals Analisa Intact Stability dan Damage Stability pada Kapal Ro-Ro Ukuran Besar di Perairan Indonesia Berdasarkan IS CODE 2008

Kapal ◽  
2019 ◽  
Vol 16 (2) ◽  
pp. 65-73
Author(s):  
M. Fikry Rizaldo ◽  
Deddy Chrismianto ◽  
Parlindungan Manik
Keyword(s):  
Intact Stability ◽  
Damage Stability ◽  
Probabilistic Concept

Kapal penumpang feri Ro-Ro merupakan moda transportasi yang cukup efisien dan efektif. Karena bisa mengangkut manusia, kendaraan, dan muatan secara bersamaan. Akan tetapi kapal jenis ini masih banyak memiliki kekurangan berupa kondisi kapal feri Ro-Ro yang saat ini beroperasi di indonesia, di mana kebanyakan geladak kendaraan tidak kedap air karena banyaknya bukaan yang ada di sekeliling kapal sehingga apabila dihitung stabilitasnya baik intact maupun damage akan berpengaruh dalam memenuhi kriteria sesuai ketentuan IMO. Metode yang digunakan untuk penelitian ini adalah menggunakan software komputasi numerik  yaitu maxsurf. Kriteria yang digunakan dalam analisa stabilitas intact dan damage menggunakan IS CODE 2008 MSC.267(85) Code on intacts stability Part B For Passengers dan SOLAS 2009 Chapter II-1 Resolution MSC.281 (85) (based on the probabilistic concept). Hasil  analisa intact stability untuk kapal Ro-Ro 1000 GT (61.30 m), dan 5000 GT (109.40 m) telah memenuhi kriteria pada 3 kondisi dengan max GZ melebihi dari 250. Analisa damage stability yang menggunakan konsep problabilistik dengan perhitungan indek subdivisi R (required subdivision index), dan A (attained subdivison index), di mana nilai indeks A harus lebih besar atau sama dengan nilai indeks R (A≥R). Nilai indeks R dipengaruhi oleh jumlah penumpang kapal dan panjang ls, sedangkan nilai indeks A dipengaruhi oleh faktor pi dan si. Hasil perhitungan pada kedua kapal yaitu, kapal Ro-Ro 1000 GT dengan indek R = 0,69405 dan indek A= 0,7207, dan kapal Ro-Ro 5000 GT dengan indek R = 0,71449 dan indek A = 0,8679. Hasil Problabilistic Damage Stability untuk kedua kapal telah memenuhi kriteria (A ≥ R).

A Review of the Ninth International Conference on the Stability of Ships and Ocean Vehicles (STAB 2006)

2008 ◽  
Vol 45 (03) ◽  
pp. 147-156
Author(s):  
Marcelo A. S. Neves ◽  
Vadim Belenky
Keyword(s):  
Rio De Janeiro ◽  
High Speed ◽  
International Conference ◽  
Intact Stability ◽  
Damage Stability ◽  
Operation Stability ◽  
The Stability

The paper gives a brief review of the papers presented at the Ninth International Conference on Stability of Ships and Ocean Vehicles that was held on September 25 to 29, 2006 in Rio de Janeiro, Brazil. The review covers the following stability-related subjects: stability regulations, intact stability, wind and waves, damage stability, stability in operation, stability of high-speed craft, and offshore vehicles.

SOLAS 2009 STABILITY REQUIREMENTS: IMPLEMENTATION

2021 ◽  
Vol 153 (A1) ◽  
Author(s):  
J Dodman
Keyword(s):  
Overall Design ◽  
Industry Standards ◽  
Damage Stability ◽  
Passenger Ships ◽  
The Future ◽  
Probabilistic Concept ◽  
Probabilistic Solution ◽  
Insight Into

January 2009 saw the introduction of substantial changes to SOLAS, commonly referred to as SOLAS 2009. Not only have significant parts of Chapter II-1 completely changed, but so have the methodologies for assessing survivability of certain ship types. This paper provides an overview of some of the main topics and how Lloyd’s Register is adapting to provide necessary industry solutions and support, immediately and into the future. It provides an insight into the probabilistic requirements, our approval processes, developments and our participation in defining industry standards. It is evident in this paper that the discussions predominantly revolve around passenger ships. This is due to their complexity and the conflict between the new regulations for survivability assessment moving from a restrained deterministic requirement to a risk-based probabilistic solution. It also highlights real issues over the difficulties of implementing this methodology. This conflict in overall design is less pronounced for dry cargo ships, which did not have to comply with a general damage stability standard until 1992 when the probabilistic concept was introduced for dry cargo ships only. Under SOLAS 2009, a modified requirement has been implemented. However, the fundamental issues remain the same.

scholarly journals A Model for Intact and Damage Stability Evaluation of CNG Ships during the Concept Design Stage

2019 ◽  
Vol 7 (12) ◽  
pp. 450 ◽  
Author(s):  
Francesco Mauro ◽  
Luca Braidotti ◽  
Giorgio Trincas
Keyword(s):  
Natural Gas ◽  
Design Process ◽  
Design Stage ◽  
Concept Design ◽  
Compressed Natural Gas ◽  
Hull Form ◽  
Intact Stability ◽  
Damage Stability ◽  
Marine Engineering ◽  
Feasible Solutions

To face the design of a new ship concept, the evaluation of multiple feasible solutions concerning several aspects of naval architecture and marine engineering is necessary. Compressed natural gas technologies are in continuous development; therefore, there are no available databases for existing ships to use as a basis for the design process of a new unit. In this sense, the adoption of a modern multi-attribute decision-based method can help the designer for the study of a completely new ship prototype. A database of compressed natural gas ships was generated starting from a baseline hull, varying six hull-form parameters by means of the design of experiment technique. Between the attributes involved in the concept design process, stability is for sure one of the most relevant topics, both for intact and damaged cases. This work describes two approaches to identify the compliance of a ship with the intact stability regulations based on the ship main geometrical quantities. Moreover, a metamodel based on the maximum floodable length concept (damage stability) allows determining the main internal subdivision of the ship. The metamodel outcomes were compared with results from direct calculations on a ship external to the database, highlighting the adequate accuracy given by the developed methods.

Concept Design of a New Non-Ship-Shaped FPSO

2012 ◽  
Vol 170-173 ◽  
pp. 2222-2227 ◽  
Author(s):  
Tian Ying Wang ◽  
Jian Zhang ◽  
Jin Kun Liu
Keyword(s):  
Frequency Domain ◽  
Potential Flow ◽  
Three Dimensional ◽  
Stability Margin ◽  
Hydrodynamic Performance ◽  
Concept Design ◽  
Intensive Study ◽  
Factors Affecting ◽  
Intact Stability ◽  
Damage Stability

In order to give full play to the advantages of FPSOs in the development of offshore oilfields, a new non-ship-shaped FPSO concept named IQFP is put forward through intensive study on various factors affecting the performance of FPSOs. Then, the optimized IQFP general design of a project case is presented based on the IQFP concept. The intact stability and damage stability of the IQFP are calculated and checked according to IMO rules. The hydrodynamic performance in frequency domain is simulated using the three-dimensional potential flow theory and compared with that of a ship-shaped FPSO with similar tonnage. The results indicate that the IQFP has a large stability margin and more excellent hydrodynamic performance than the ship-shaped FPSO. Through the research of this paper, the excellent characteristic of the new FPSO concept IQFP is verified and the basis and foundation are provided for the further studies.

NAVAL ARCHITECTURAL CONSIDERATIONS IN THE DESIGN OF FLOATING DOCK

2021 ◽  
Vol 159 (A2) ◽  
Author(s):  
G S Sundaresan ◽  
Sandeep Kumar Jain B ◽  
Srikanth A ◽  
M Abdul Shakeel
Keyword(s):  
Significant Role ◽  
Bending Moment ◽  
Optimization Techniques ◽  
Volume Reduction ◽  
Size Optimization ◽  
Transverse Bending ◽  
Intact Stability ◽  
Damage Stability ◽  
Lifting Capacity ◽  
Design Software

A brief introduction about floating docks, its advantages and types have been described. The naval architectural considerations which play a significant role in the design of floating dock have been explained. Typical ratios of L/B and L/D as a function of Dock’s lifting capacity have been presented. Empirical formulation for the same have also been indicated wherever applicable. Intact stability and its criterion as applicable for a floating dock have been described. Critical positions during evolution of docking operation and important considerations while performing stability calculations have been highlighted. Attention has also been drawn to the damage stability of floating dock. Aspects of longitudinal and transverse bending moment, which are the governing aspects in the scantling calculations have been described. Also typical methods for securing and mooring of floating dock, without compromising on flexibility for docking operations have been described. Methodology and consideration which has to be kept in mind while using design software (such as NAPA) have been indicated. Simple size optimization techniques which result in steel / ballast volume reduction have also been explained.

A unique application and point of truth for Naval Architecture Calculations

2015 ◽  
Author(s):  
Rodrigo Perez ◽  
Verónica Alonso
Keyword(s):  
Concept Design ◽  
Stability Criteria ◽  
Power Prediction ◽  
Naval Architecture ◽  
Complete Control ◽  
Intact Stability ◽  
Damage Stability ◽  
Cad Cam ◽  
The Stability ◽  
Definition Of

Many tools handle with the calculation of compartment definition, hydrostatics, intact and damage stability and power prediction, but these calculations are separated from the rest of ship CAD/CAM tools. Ship designers need to work closely with the shipyards, in a complex and distributed environment making necessary to have suitable tools at early design stages to ensure profitable projects. Naval architecture is handled in FORAN with a revolutionary approach, where integration and advanced features are the relevant characteristics in a single and complete set of applications that are used in conjunction to other disciplines, from concept design to operation. This new approach groups the former modules for naval architecture available in FORAN from many years, is intuitive and user-friendly. The information is stored in a database instead of a wide set of files. As regards this feature, there are two different alternatives depending on the scope of the project. If the ship designer wants to calculate only naval architecture calculations, the solutions is based on a SQLITE database suitable for a standalone application. This approach benefits a ship design office, in the study of different design alternatives very quickly but having a complete control of them. The other option is integrating the Naval Architecture with the rest of FORAN design disciplines, in a single database based in Oracle. In this case, the great benefit comes from the single truth of data from concept design to operation, which ensures dramatically the reduction of errors and re-work. After the definition of compartments in 3D, by using a very fast application, the module guides the user through the naval architecture calculations with a tree of elements very intuitive, with powerful key algorithms and with a solid representation of spaces. The definition of the necessary entities to make any kind of calculation is very fast. For the intact stability a set of standard stability criteria is provided. It is based in a quick definition of loading conditions, initial situations, flooding conditions and compartment subdivisions. And for the evaluation of the damage stability a set of standard stability criteria are also provided, following deterministic and probabilistic approaches. With these tools any naval architect is able to make very fast all the necessary studies to assure the stability regulations are complied with.

Naval Architectural Considerations in the Design of Floating Dock

2017 ◽  
Vol Vol 159 (A2) ◽  
Author(s):  
G S Sundaresan ◽  
Sandeep Kumar Jain B ◽  
Srikanth A ◽  
M Abdul Shakeel
Keyword(s):  
Significant Role ◽  
Bending Moment ◽  
Optimization Techniques ◽  
Volume Reduction ◽  
Size Optimization ◽  
Transverse Bending ◽  
Intact Stability ◽  
Damage Stability ◽  
Lifting Capacity ◽  
Design Software

A brief introduction about floating docks, its advantages and types have been described. The naval architectural considerations which play a significant role in the design of floating dock have been explained. Typical ratios of L/B and L/D as a function of Dock’s lifting capacity have been presented. Empirical formulation for the same have also been indicated wherever applicable. Intact stability and its criterion as applicable for a floating dock have been described. Critical positions during evolution of docking operation and important considerations while performing stability calculations have been highlighted. Attention has also been drawn to the damage stability of floating dock. Aspects of longitudinal and transverse bending moment, which are the governing aspects in the scantling calculations have been described. Also typical methods for securing and mooring of floating dock, without compromising on flexibility for docking operations have been described. Methodology and consideration which has to be kept in mind while using design software (such as NAPA) have been indicated. Simple size optimization techniques which result in steel / ballast volume reduction have also been explained.

A Review of the 8th International Conference on the Stability of Ship and Ocean Vehicles (STAB 2003)

2005 ◽  
Vol 42 (01) ◽  
pp. 21-30
Author(s):  
Luis Pérez Rojas ◽  
Vadim L. Belenky
Keyword(s):  
Environmental Modeling ◽  
Paper Briefly ◽  
International Conference ◽  
Regulatory Aspects ◽  
Water On Deck ◽  
Fishing Vessels ◽  
Intact Stability ◽  
Damage Stability ◽  
Design For Safety ◽  
The Stability

This paper briefly reviews the papers presented at the 8th International Conference on Stability of Ship and Ocean Vehicles that was held September 15–19, 2003, in Madrid, Spain. The review covers the following stability-related subjects: history, accident investigation, water on deck, extreme weather effects, stability of unconventional vessels, design for safety, damage stability, including large passenger vessels, para-metric roll, regulatory aspects, environmental modeling, human factors, safety in operations, nonlinear dynamics, unconventional problems, intact stability, antirolling devices, fishing vessels stability, and ship motion in waves, as well as several workshops on intact stability, damage stability, fishing vessels, and risk-based designs.

On the use of leading safety indicators in maritime and their feasibility for Maritime Autonomous Surface Ships

2021 ◽  
pp. 1748006X2110276
Author(s):  
Krzysztof Wróbel ◽  
Mateusz Gil ◽  
Przemysław Krata ◽  
Karol Olszewski ◽  
Jakub Montewka
Keyword(s):  
Literature Review ◽  
Current Practice ◽  
Scientific Literature ◽  
Research Effort ◽  
Holistic Approach ◽  
Research Directions ◽  
Safety Critical ◽  
Intact Stability ◽  
Conference Papers ◽  
Operational Aspects

Although the safety of prospective Maritime Autonomous Surface Ships will largely depend on their ability to detect potential hazards and react to them, the contemporary scientific literature lacks the analysis of how to achieve this. This could be achieved through an application of leading safety indicators. The aim of the performed study was to identify the research directions of leading safety indicators in three safety-critical operational aspects of Maritime Autonomous Surface Ships: collision avoidance, intact stability, and communication. To achieve this, literature review is performed, taking into account scientific documents including journal and conference papers. The results indicate that the need for establishing operational leading safety indicators is recognized by numerous scholars, who sometimes make suggestions of what the set of indicators shall consist of. Some leading safety indicators for autonomous vessels are readily identifiable in the scientific literature and used in current practice. However, the research effort is lacking a holistic approach to the issue.

scholarly journals Conception and Evolution of the Probabilistic Methods for Ship Damage Stability and Flooding Risk Assessment

2021 ◽  
Vol 9 (6) ◽  
pp. 667
Author(s):  
Dracos Vassalos ◽  
M. P. Mujeeb-Ahmed
Keyword(s):  
Risk Assessment ◽  
Probabilistic Method ◽  
Probabilistic Methods ◽  
Full Description ◽  
Safety Level ◽  
Probability Of Survival ◽  
Damage Stability ◽  
Passenger Ships ◽  
Flooding Hazards ◽  
Flooding Risk

The paper provides a full description and explanation of the probabilistic method for ship damage stability assessment from its conception to date with focus on the probability of survival (s-factor), explaining pertinent assumptions and limitations and describing its evolution for specific application to passenger ships, using contemporary numerical and experimental tools and data. It also provides comparisons in results between statistical and direct approaches and makes recommendations on how these can be reconciled with better understanding of the implicit assumptions in the approach for use in ship design and operation. Evolution over the latter years to support pertinent regulatory developments relating to flooding risk (safety level) assessment as well as research in this direction with a focus on passenger ships, have created a new focus that combines all flooding hazards (collision, bottom and side groundings) to assess potential loss of life as a means of guiding further research and developments on damage stability for this ship type. The paper concludes by providing recommendations on the way forward for ship damage stability and flooding risk assessment.

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