Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan最新文献_第3页

Criticality Analysis for Research Vessel Machinery System Maintenance Strategy. Study Case: RV. Baruna Jaya 科考船机械系统维修策略的临界性分析。研究案例:RV。Baruna Jaya

Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Pub Date : 2023-01-17 DOI: 10.14710/kapal.v20i1.49351

M. Muryadin, F. Noor, D. F. Prasetyo, Rio Dwi Sakti Wijaya

{"title":"Criticality Analysis for Research Vessel Machinery System Maintenance Strategy. Study Case: RV. Baruna Jaya","authors":"M. Muryadin, F. Noor, D. F. Prasetyo, Rio Dwi Sakti Wijaya","doi":"10.14710/kapal.v20i1.49351","DOIUrl":"https://doi.org/10.14710/kapal.v20i1.49351","url":null,"abstract":"In recent years, marine survey operations such as survey operations for underwater communication cables and tsunami early warning systems have become an annual activity involving research vessels in Indonesia. Along with the increasing age of the ship, it will be followed by a decrease in the performance of the machinery system. Maintenance of the machinery system is carried out to maintain the desired performance by ship users. However, with a large number of machinery system equipment and limited resources, an analysis is needed to prioritize which equipment or components need regular maintenance and monitoring activity. By classifying all assets into a hierarchical form and performing a risk-based criticality analysis, equipment will be prioritized based on the probability of failure and the level of consequence. By determining the probability of failure of a component based on historical data and reference failure data, and determining the consequences for health safety (HS), production (P), Environment (E), and Containment (Cn), the risk would be obtained. From this analysis obtained as many as 766 equipment and components consisting of 38 rotary equipment, 45 static equipment, 196 piping components, and 487 instruments. The risk analysis obtained as many as 23 (3%) of equipment in H (high), 138 (18%) in the M (medium) condition, and 605 (79%) in the L (low) condition. The criticality results determined that 161 (21%) equipment in H & L conditions would be carried out planned maintenance and 605 (79%) equipment in low condition would be carried out unplanned maintenance.","PeriodicalId":396367,"journal":{"name":"Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115699716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical Analysis of Submarine Hydrodynamic Force Near the Seabed 水下近海床水动力数值分析

Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Pub Date : 2023-01-15 DOI: 10.14710/kapal.v20i1.49471

Muhamad Ridwan Utina, Rina Rina, E. Suwarni, Putri Virliani, Widodo Widodo, Dian Purnama Sari

引用次数: 0

Failure Analysis of Fuel System Main Engine Fishing Vessel (Case Study : KM. Sumber Mutiara) 渔船燃油系统主机故障分析(以KM为例)。Sumber Mutiara)

Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Pub Date : 2023-01-12 DOI: 10.14710/kapal.v20i1.48530

R. I. Yaqin, Mohamad Akmal, Juniawan Preston Siahaan, Mega Lazuardi Umar, B. Priyambodo, Yuniar Endri Priharanto

{"title":"Failure Analysis of Fuel System Main Engine Fishing Vessel (Case Study : KM. Sumber Mutiara)","authors":"R. I. Yaqin, Mohamad Akmal, Juniawan Preston Siahaan, Mega Lazuardi Umar, B. Priyambodo, Yuniar Endri Priharanto","doi":"10.14710/kapal.v20i1.48530","DOIUrl":"https://doi.org/10.14710/kapal.v20i1.48530","url":null,"abstract":"Failure analysis on the fishing vessel's main engine is one of the works that must be completed because it is crucial for the operation of the ship. Analysis of determining the cause and effect of the failure main engine fuel system is the goal of this study. FMEA (Failure Mode and Effect Analysis) is a method used to determine priority components in failure. The use of Pareto diagrams is an additional method of analysis. RCFA (Root Cause Failure Analysis) is used to analyze the root cause of the failure of the main engine fuel system. The results obtained are the injector component (168) is the component that has the highest RPN value and is the largest contributor to failure according to the Pareto diagram. The root of the failure identified is the lack of checking before operating. The results of the recommendations obtained are the use of corrective maintenance based on the RPN value and the use of a clean filter for the fuel system. The injector is a component that needs to be maintained so as not to experience a fuel system failure on the main engine. The impact of the results of this study is that it becomes a scientific finding using FMEA and RCFA as a method of analyzing failures in the main engine fuel system on fishing vessels","PeriodicalId":396367,"journal":{"name":"Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125031446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical Analysis on Added Resistance of a Crew Boat with Variation of Wave Period 波浪周期变化下乘员艇附加阻力的数值分析

Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Pub Date : 2022-12-27 DOI: 10.14710/kapal.v20i1.48615

Dita Adhelia Putri, M. H. N. Aliffrananda, S. Riyadi, S. Sutiyo, I. Utama

{"title":"Numerical Analysis on Added Resistance of a Crew Boat with Variation of Wave Period","authors":"Dita Adhelia Putri, M. H. N. Aliffrananda, S. Riyadi, S. Sutiyo, I. Utama","doi":"10.14710/kapal.v20i1.48615","DOIUrl":"https://doi.org/10.14710/kapal.v20i1.48615","url":null,"abstract":"Crew boat is a type of vessels used for the mobility of offshore workers and logistical supply needed for the offshore platform. Crew boat KCT-1901 is categorized as a planning boat with hard chine body. KCT-1901 requires an added power when it is sailing through a seaway. The reason behind this is because when a ship sails through a seaway, the ships experienced a heave and pitch motion resulted in added resistance and hence added power. The goal of the investigation is to estimate added resistance and added power of the crew boat using computational fluid dynamic (CFD) method and tested in calm water and in waves with several Froude numbers (Fr) and wave periods. A method developed by Savitsky is used for verification at high-speed mode. The largest total resistance using CFD in calm water is 38.98 kN and using Savitsky method is 39.00 kN obtained at Fr 0.72. Both are in good agreement and the discrepancy is less than 0.1%. Comparative study was carried out against experimental test in a towing tank. The drag forces tested at Fr 0.12 and 0.24, between the two approaches, showed a discrepancy of about 4%. Further CFD test was conducted on wave pattern analysis, which demonstrated that as the Fr increases the becomes clearer and stronger and tests in waves condition at lower wave period showed that the transverse wave becomes more apparent. Therefore, overall can be said that the CFD simulation showed such a good agreement with empirical Savitsky method and experimental tank test.","PeriodicalId":396367,"journal":{"name":"Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129603154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On-Bottom Stability Analysis of Subsea Pipelines Based on DNVGL RP F109 基于DNVGL RP F109的海底管道海底稳定性分析

Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Pub Date : 2022-11-06 DOI: 10.14710/kapal.v19i3.48398

Asfarur Ridlwan, Moehamad Syarif Hidayatullah, Elsa Rizkiya Kencana

{"title":"On-Bottom Stability Analysis of Subsea Pipelines Based on DNVGL RP F109","authors":"Asfarur Ridlwan, Moehamad Syarif Hidayatullah, Elsa Rizkiya Kencana","doi":"10.14710/kapal.v19i3.48398","DOIUrl":"https://doi.org/10.14710/kapal.v19i3.48398","url":null,"abstract":"Subsea pipeline must be design as stable as possible to prevent failure, considering the external forces from current, wave and soil conditions. Based on these problems, the on-bottom stability analysis needs to be considered in the design of the subsea pipeline by referring to the requirements set out in the DNVGL RP F109 2017. The results of the analysis are the value of hydrodynamic force in the horizontal direction which are 99,916 N/m and 204,358 N/m for installation and operating conditions respectively, while the hydrodynamic force in the vertical direction for installation conditions is 46,852 N/m and operating conditions is 192,232. N/m. The result of absolute lateral static stability analysis, the pipe with a concrete coating thickness of 40 mm both in installation and operating conditions is stable, because it has met the criteria. The result of generalized lateral stability analysis, in installation conditions, the displacement of 0,5 and 10 times of pipe diameter have reached the safety factor. Meanwhile, in operating conditions, the displacement of 0,5 times of pipe diameter has not reached the safety factor, while for displacement of 10 times the pipe diameter is alright. Therefore, the concrete ballast thickness needs to be added to become 44 mm. Modeling using ANSYS CFX software was carried out to obtain the value of hydrodynamic forces acting on the pipe. The result of pipe modeling in installation conditions are 83,578 N/m and 57,13 N/m for hydrodynamic forces in the horizontal and vertical directions. The model is verified and categorized as a good numerology and modeling due to the simple data and information as an input in ANSYS CFX.","PeriodicalId":396367,"journal":{"name":"Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121759610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Integrity Assessment of Wall Distorted of Buried Gas Pipeline 埋地输气管道管壁变形完整性评价

Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Pub Date : 2022-11-01 DOI: 10.14710/kapal.v20i1.48231

Wira Herucakra, L. Adnyani, Lukytoardi Megantoro

{"title":"Integrity Assessment of Wall Distorted of Buried Gas Pipeline","authors":"Wira Herucakra, L. Adnyani, Lukytoardi Megantoro","doi":"10.14710/kapal.v20i1.48231","DOIUrl":"https://doi.org/10.14710/kapal.v20i1.48231","url":null,"abstract":"In the oil and gas industry, the pipeline is the main mode to transport the product and can be applied for long-distance transportation; hence some pipe segments may be buried underground. Buckling as the main cause of pipeline deformation and failure is often found at the in-service buried pipeline during inspection activity. Changes in laying conditions such as design and operational parameters, human activity and geological movement can affect the redistribution of deformation that may lead to pipe buckling. This paper presents a methodology that integrates inspection results and finite element analysis for the distorted wall of the pipeline. Inspection reported anomaly cases of wall distorted at buried gas pipeline, and the result will be used to do stress analysis using finite element analysis. Three different conditions within the different treatment of bedding conditions were assessed: pipe buried on uncompacted soil, pipe buried with rock bedding, and pipe buried in compacted soil. The result shows that the deteriorated pipe can be considered acceptable when buried in compacted soil. This condition may be used for further action and consideration, such as a mitigation strategy to maintain the safety and integrity of the deteriorated pipe.","PeriodicalId":396367,"journal":{"name":"Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116916012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Design of a Semi-Submersible Tourism Ship for Bunaken Underwater Recreation in Manado, Indonesia 为印度尼西亚万鸦老布纳肯水下娱乐设计的半潜式旅游船

Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Pub Date : 2022-09-13 DOI: 10.14710/kapal.v19i3.46629

W. Aryawan, M. H. N. Aliffrananda, D. Utama, H. Hasanudin, Y. A. Hermawan

引用次数: 2

CFD Simulation Verification Processes at Planing Hulls using An Interceptor 使用拦截器进行船体规划的CFD模拟验证过程

Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Pub Date : 2022-08-28 DOI: 10.14710/kapal.v19i3.48319

Budi Utomo, Samuel Samuel, S. Yulianti, G. Rindo, M. Iqbal, A. Fathuddiin

{"title":"CFD Simulation Verification Processes at Planing Hulls using An Interceptor","authors":"Budi Utomo, Samuel Samuel, S. Yulianti, G. Rindo, M. Iqbal, A. Fathuddiin","doi":"10.14710/kapal.v19i3.48319","DOIUrl":"https://doi.org/10.14710/kapal.v19i3.48319","url":null,"abstract":"Experimental test is one of the methods for predicting drag ships using towing tank. This method has a good level of accuracy but requires quite complex equipment and costs. With the advancing technology of computing, the CFD method has emerged as an alternative for problem-solving, especially in hydrodynamics analysis. This study aims to ensure the accuracy of Computational Fluid dynamics (CFD) by verifying experimental data on high-speed vessel using an interceptor. The Interceptor system generates a hydrodynamic lift force by intercepting the flow of water under the hull. Comparison of experimental results and numerical simulations will involve analysis of drag, heave and trim. Numerical simulations were carried out using ITTC recommendations as testing standards. This research uses the grid independence study method to ensure the accuracy of the mesh. CFD simulations were carried out using the overset mesh method and the k-epsilon to solve turbulence flow. The Dynamic Fluid Body Interaction (DFBI) module is employed to resolve the dynamic motion of the ship in order to assess hull movements based on by fluid forces and moments. There can be two degrees of freedom in the heave and pitch directions. All simulations are performed in calm water condition. Verification is carried out by reviewing the condition of the ship without an interceptor and with an interceptor. 100% stroke and 60% interceptor were used as variations of the verification of this study. The results of this study indicate that the CFD analysis has been verified by the experimental method with a maximum error range of 10.7%. Planing hull is a type of fast ship that has quite complex hydrodynamic characteristics. This study also shows that the use of interceptors is proven to improve the performance of the planing hull ship. ","PeriodicalId":396367,"journal":{"name":"Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128585024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Investigation of Hull Design Modifications on Fuel Consumption and Energy Efficiency Design Index (EEDI) 基于燃油消耗和能效设计指数(EEDI)的船体设计修改研究

Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Pub Date : 2022-08-16 DOI: 10.14710/kapal.v19i3.47029

Betty Ariani, R. C. Ariesta, Rembo Prasetya, Marista Oktaviani, Mohammad Hanifuddin Hakim

{"title":"Investigation of Hull Design Modifications on Fuel Consumption and Energy Efficiency Design Index (EEDI)","authors":"Betty Ariani, R. C. Ariesta, Rembo Prasetya, Marista Oktaviani, Mohammad Hanifuddin Hakim","doi":"10.14710/kapal.v19i3.47029","DOIUrl":"https://doi.org/10.14710/kapal.v19i3.47029","url":null,"abstract":"Currently, efforts are focused on reducing emissions to support carbon neutrality by 2050 through green technology. Green technology applies to the ship's design, port, engine selection, fuel, and operation. This study modified the hull to reduce drag and improve fuel efficiency. Changes were made based on variations in the deadrise angle, which were analyzed using numerical simulation. In the current situation, the deadrise angle is changed from 9° to 10°, 15°, and 20°. On the angle variation, the effects of changes in ship drag, fuel, and energy efficiency design index were analyzed (EEDI). The method simulates computational fluid dynamics with a Holtrop calculation method validation approach. At 12 and 6 knots above the current deadrise, resistance is reduced by 8.2% and 6.8%, respectively. The fuel efficiency achieved is 6.9% at 6 knots and 8.2% at 12 knots, resulting in monthly fuel savings of 2.43 tonnes. Furthermore, the phenomenon of the EEDI value at the lowest resistance and highest speed has a decreased performance value. Reducing the speed from 12 to 9 knots improves the performance of EEDI by 66%","PeriodicalId":396367,"journal":{"name":"Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129873106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparative Analysis of Slamming Phenomenon Prediction between U and V Hulls using Strip Theory Method 用条形理论方法预测U型和V型船体撞击现象的比较分析

Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Pub Date : 2022-08-09 DOI: 10.14710/kapal.v19i3.46805

M. L. Hakim, A. Firdaus, G. M. Ahadyanti, T. Yulianto

{"title":"Comparative Analysis of Slamming Phenomenon Prediction between U and V Hulls using Strip Theory Method","authors":"M. L. Hakim, A. Firdaus, G. M. Ahadyanti, T. Yulianto","doi":"10.14710/kapal.v19i3.46805","DOIUrl":"https://doi.org/10.14710/kapal.v19i3.46805","url":null,"abstract":"Choosing the right hull shape is important in designing a ship, for example, a U-section or V-section of the hull. The hull shape will affect various aspects, such as design, resistance, seakeeping, structure and production. The ship hull must be properly designed so that it can operate according to the ship’s mission. From the seakeeping aspect of the ship's motion at sea, the difference in the hull shape will result in different motions and dynamic effects such as the slamming phenomenon. Based on the difference in the hull shape cases, this study analyzed the difference in the probability of slamming between the U and V hulls. Both hulls were made based on Formdata and almost all parameters were made the same. Parameters that cannot be forced to be the same are WSA (wetted surface area), (coefficient of waterplane area), and (distance of keel to buoyancy), where those parameters determine the difference in the results. The calculation of RAO (operator amplitude response) was obtained using the strip theory method which assisted by Maxsurf Motion software. The results became the input for the calculation of the slamming probability. The study results show that the U hull has a higher probability of slamming occurrence than that of the V hull, with the difference in values ranging from 20% to 35%. Therefore, the U hull will get more frequent slamming loads, so it has the potential to have a higher structural failure (fatigue) than that of the V hull.","PeriodicalId":396367,"journal":{"name":"Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan","volume":"122 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124438982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0