• Title/Summary/Keyword: Oil Tank Analysis

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A Case Study on the Method to Improve on the Structure of Oil Tank (유류탱크 수명과 구조 개선 방안에 대한 사례연구)

  • Yoon, Tae Gook;Lee, Song
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.10 no.2
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    • pp.185-190
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    • 2006
  • This study carried out an evaluation of an oil tank that was defective in structure. This paper is divided into two sections which are analysis for the working process and suggestion for improving on the structure of the oil tank. As stated above, it has three major factors as to an improvement, such as the life cycle of structure (especially physical life cycle), and the many factors related to the duration years of the oil tank and analysis result. Based on this study, the improvement of oil tank was established. For example, the ground investigation needs before design and construction of oil tank, and constructing the oil tank by retaining wall type tank is good for maintenance. Also, it is important that the system for drainage is related to maintenance.

Static load test and dynamic characteristics analysis of bogie and body structures of an oil tank (유조화차의 대차 및 구조체 하중시험과 동특성 해석 연구)

  • 홍재성;함영삼;백영남;오택열;김길동
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2003.06a
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    • pp.780-783
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    • 2003
  • In this study, As The Tae Yang Metal company manufactured oil tank inserts welding structure bogie, it is Contributed in stability security of freight car of oil tank through static load test, dynamic characteristics analysis. vibration performance test etc. to verify intensity of bogie frame & body structure

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Seismic response analysis of an oil storage tank using Lagrangian fluid elements

  • Nagashima, Toshio;Tsukuda, Takenari
    • Coupled systems mechanics
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    • v.2 no.4
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    • pp.389-410
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    • 2013
  • Three-dimensional Lagrangian fluid finite element is applied to seismic response analysis of an oil storage tank with a floating roof. The fluid element utilized in the present analysis is formulated based on the displacement finite element method considering only volumetric elasticity and its element stiffness matrix is derived by using one-point integration method in order to avoid volumetric locking. The method usually adds a rotational penalty stiffness to satisfy the irrotational condition for fluid motion and modifies element mass matrices through the projected mass method to suppress spurious hourglass-mode appeared in compensation for one-point integration. In the fluid element utilized in the present paper, a small hourglass stiffness is employed. The fluid and structure domains for the objective oil storage tank are modeled by eight-node solid elements and four-node shell elements, respectively, and the transient response of the floating roof structure or the free surface are evaluated by implicit direct time integration method. The results of seismic response analyses are compared with those by other method and the validation of the present analysis using three-dimensional Lagrangian fluid finite elements is shown.

A Comparative Study of Numerical and Theoretical Predictions of Oil Outflows from Damaged Ships (손상 선박 기름 유출량 추정을 위한 수치해석과 이론식의 비교 연구)

  • Yo-Seop, Moon;Je-In, Kim;Il-Ryong, Park;Seong-Bu, Suh;Seung-Guk, Lee;Hyuek-Jin, Choi;Sa-Young, Hong
    • Journal of the Society of Naval Architects of Korea
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    • v.59 no.6
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    • pp.400-412
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    • 2022
  • This paper provides the results of numerical and theoretical predictions of oil outflows from damaged single-hull and double-hull ships.Theoretical equations derived from the unsteady Bernoulli equation and a CFD method for multi-phase flow analysis were used to estimate the oil outflow rate from cargo tank. The predicted oil outflow rate from a single-hull cargo tank damaged due to grounding and collision accidents showed a good agreement with the available experimental results in both numerical and theoretical analyses. However, in the case of the double-hull conditions, the time variation of the amount of water and oil mixture inside the ballast tank predicted by the theoretical equation showed some different behavior from the numerical results. The reason was that the interaction of the oil flow with the water inflow in the ballast tank was not reflected in the theoretical equations. In the problems of the initial pressure condition in the cargo and ballast tanks, the oil outflow and water inflow were delayed at the pressure condition that the tanks were sealed. When the flow interaction between the oil and water in the ballast tank was less complicated, the theoretical and the numerical results showed a good agreement with each other.

FEM analysis of the tank car for carrying hazardous materials (위험물 수송용 탱크화차에 대한 유한요소 해석)

  • Lim, C.H.;Goo, B.C.
    • Proceedings of the KSR Conference
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    • 2007.05a
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    • pp.1540-1545
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    • 2007
  • In these days, many kinds of tank car such as Oil tank car, Asphalt tank car, Sulfuric Acid tank car and Propylene tank car are used for carrying hazardous materials. Although they have a lot of dangerous possibilities when they meet with accidents examples of collisions and derailments there are not prescribed methods or standards for structural analysis using FEM. In this study, the structural stress analysis for an Asphalt tank car(Non-pressurized tank) and a Propylene tank car(Pressurized tank) was performed using the FEM refer to the test method in JIS E 7102(Design Methods for Tanks of Tank Cars). And then we suggested the tank car analysis procedures and considered the results.

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Development of Water Wheel Type Oil Skimmer (수차형 유회수기의 개발)

  • 노준혁;박안진;강상훈;이영식;김종현;윤범상
    • Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
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    • 2000.10a
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    • pp.123-128
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    • 2000
  • The ocean is now increasingly suffering from pollution mainly caused by oil spill accidents roil increasing marine transportation. It cause not only the deterioration of ocean resources but also critical damage on the ocean ecosystem. Present study is an experimental one for the development of the oil skimmer which can collect spilled-oil actively and effectively from the sea surface. As an effort of achieving it, a new type of water wheel attached nil skimmer was devised, based upon the concept of orifice. The shapes of the water wheel, blades and oil storing tank are found to be very important factors on the oil skimming performance through systematic experimental analysis. Real oil recovery test was also carried out in square tank using the oil skimmer with their optimal shapes. Quite satisfactory result are obtained from the test which showed 99% and 98% recovery rates for light oil and heavy oil in still water condition, respectively.

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A Study on the Prevention of Spill of Fuel Oils and Lubricating Oils for Sunken Ships

  • Han, Won-Heui;Ju, Hae-Ji
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.21 no.3
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    • pp.309-314
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    • 2015
  • A sunken ship often involves an oil spill. This paper was carried out to minimize environmental and cost damages stemming from oil spil of sunken shipl. Through the analysis of both the standards of the oil tank system and installation, we have identified potential oil spill sites and proposed a remedy of prevention. The result of study, the air pipes of the oil tank are a vulnerable point for oil spill. Also, the remote control devices of emergency shut-off valve have poor accessibility at abandon ship, making it difficult to shut off the emergency shut-off valve. Thus, we propose the addition of a remote quick closing valve in the air pipe and the building of a central control system.

Oil Storage Tank Inspection using 3D Laser Scanner (3D 레이저스캐너를 활용한 유류 저장탱크의 검사)

  • Park, Joon-Kyu;Lee, Keun-Wang
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.21 no.12
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    • pp.867-872
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    • 2020
  • Oil storage tanks are a major structure in chemical industrial complexes. Damage to the structure due to natural disasters or poor management can cause additional damage, such as leakage of chemicals, fire, and explosion, so it is essential to understand the deformation. In this study, data on oil storage tanks were acquired using a 3D laser scanner, and various analyzes were performed for storage tank management by comparing them with design data. Modeling of the oil storage tank was performed using the data and design drawings acquired by a 3D laser scanner. An inspection of the oil storage tank was effectively performed by overlapping. In addition, cross-sectional and exploded views of the deformation were produced to generate visible data on the deformation of the facility, and it was suggested that the oil storage tank had a maximum deformation of -7.16mm through quantitative analysis. Data that can be used for additional work was obtained by producing drawings to be precisely inspected for areas with large deformation. In the future, an inspection of oil storage tanks using 3D laser scanners is quantitative and visible data on oil storage tank deformation. This will greatly improve the efficiency of facility management by rebuilding it.

Study on Vibration Characteristics of Fluid Tank Structure for Ship (유체 탱크 구조물의 접수 진동 특성에 관한 연구)

  • Seo, Myeng-Kab;Seok, Ho-Il;Lee, Chul-Won
    • Special Issue of the Society of Naval Architects of Korea
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    • 2013.12a
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    • pp.85-89
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    • 2013
  • In the engine room and the aft body, there are so many fluid tanks such as fresh water tank and oil tank. The vibration analysis for the fluid tank structures has to consider the added mass effect due to the fluid. However, it is known that the result of the fluid tank has the difference according to the boundary condition of the fluid field such as infinite fluid and finite fluid. In this paper, a numerical case study is carried out for the research about the vibration characteristics of the fluid tank with various fluid field. In addition, an experimental study is carried out to verify the validity of the vibration analysis for the fluid tank structure.

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Cause Analysis of Cone Roof Tank Collapse during Plant Construction (플랜트 공사 중 발생한 Cone Roof Tank 붕괴 사고 원인 분석)

  • Kim, Seung-Han;Kim, Byung-Suk
    • Journal of the Korea Safety Management & Science
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    • v.18 no.3
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    • pp.71-80
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    • 2016
  • This study is on safety improvement measures through analysis of accident cases during plant storage tank construction. Storage tank is a general term for artificial ground facility constructed to store oil, water, gas, and other chemicals. Some companies have clustered storage tanks (tank farm). The construction methods vary according to the component and types of fluids. Because most of the construction procedures include lifting heavy weight materials using heavy construction equipment and are carried out at high places, storage tank construction contains more risk factors than normal aerial construction. Recently, major accidents such as storage tank collapse have occurred often, and cost many lives due to the characteristics of the structure. In this study we would like to analyze the cause of these accidents and propose measures to improve safety.