Strength Assessment on Support System of LNG Independent Type B Tank Under Sloshing Loads

2017 ◽  
Author(s):  
Wen Dong ◽  
Zhengyi Zhang ◽  
Jingxi Liu ◽  
De Xie
Keyword(s):  
Integral Model ◽  
Strength Analysis ◽  
Support Structures ◽  
Arbitrary Lagrangian Eulerian ◽  
Type B ◽  
Strength Assessment ◽  
Fine Mesh ◽  
Nodal Displacements ◽  
Lng Tank ◽  
High Level

A Liquefied Natural Gas (LNG) tank usually contains cryogenic cargo with free liquid surface and requires high level of safety. In this study, a two-step procedure has been developed for strength evaluation of support structures in LNG carriers with independent type B tank, which is partly loaded and under sloshing impact. First, an integral model containing a rigid tank and connectors is used to investigate the displacement and force response of supports in time domain. Then, several local models are used for the fine mesh stress analyses of support structures. The nodal displacements of connectors are extracted from integral model and applied to the local model as boundary conditions. The finite element method has been implemented in both steps. The arbitrary Lagrangian-Eulerian technique is applied for kinematical descriptions of the fluid domain in the direct sloshing analysis of type B tank in first step. The present numerical results are compared with previous experimental values, results of other numerical method and analytical solutions, which validates the reliability and accuracy of this method. It is noted that the proposed procedure can be utilized for strength analysis of other types of LNG tanks and helps to optimize their structural design straightforwardly.

scholarly journals High-level carbapenem resistance in a Citrobacter freundii clinical isolate is due to a combination of KPC-2 production and decreased porin expression

2008 ◽  
Vol 57 (3) ◽  
pp. 332-337 ◽  
Author(s):  
Rong Zhang ◽  
Lijiang Yang ◽  
Jia Chang Cai ◽  
Hong Wei Zhou ◽  
Gong-Xiang Chen
Keyword(s):  
Outer Membrane Proteins ◽  
Type A ◽  
Resistant Isolate ◽  
Pcr Analysis ◽  
Citrobacter Freundii ◽  
Type B ◽  
Chromosomal Dna ◽  
High Level ◽  
Level Resistance ◽  
M 14

An imipenem-resistant isolate of Citrobacter freundii ZJ163 (MIC 256 μg ml−1) isolated from a Chinese hospital was investigated. The C. freundii ZJ163 isolate exhibited high-level resistance to carbapenems, penicillins, cephalosporins, cefoxitin, aztreonam, quinolones and aminoglycosides. Isoelectric focusing (IEF) demonstrated three β-lactamases with pIs of 5.4 (TEM-1), 6.7 (KPC-2) and 7.9 (CTX-M-14). Two different transconjugants (types A and B) were obtained by conjugation studies. The type A transconjugant exhibited reduced susceptibility or resistance to penicillins, cephalosporins and aztreonam, but was susceptible to carbapenems, quinolones and aminoglycosides. The antimicrobial susceptibility patterns of the type B transconjugant were similar to that of type A, except for its significantly reduced carbapenem susceptibility (imipenem MIC 2 μg ml−1). IEF, specific PCRs and DNA sequence analysis indicated that the type A transconjugant produced CTX-M-14 β-lactamase with a pI of 7.9, that the type B transconjugant produced KPC-2 β-lactamase with a pI of 6.7 and that the β-lactamase with a pI of 5.4 was TEM-1. PCR analysis and sequencing confirmed the presence of the ampC gene in the chromosomal DNA from C. freundii ZJ163, although no activity of AmpC β-lactamase was detected by IEF. Urea/SDS-PAGE analysis of outer-membrane proteins revealed that the levels of the 41 and 38 kDa porins were decreased in C. freundii ZJ163. It was concluded that production of KPC-2 combined with decreased expression of porins contributes to high-level resistance to carbapenems in C. freundii ZJ163.

scholarly journals Karakteristik Fisiko-Kimia Konsentrat Protein Ikan Sunglir (Elagatis bipinnulatus)

Jurnal MIPA ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 164
Author(s):  
Frets Jonas Rieuwpassa ◽  
Eko Cahyono
Keyword(s):  
Amino Acids ◽  
Physicochemical Properties ◽  
Essential Amino Acids ◽  
Fat Content ◽  
Pelagic Fish ◽  
Animal Protein ◽  
Physical Analysis ◽  
Fat Absorption ◽  
Type B ◽  
High Level

Ikan merupakan sumber protein hewani yang memiliki daya cerna yang lebih baik dan jumlah kandungan asam amino essensial yang lebih banyak dibandingkan dengan sumber protein hewani lainnya. Ikan sunglir adalah jenis ikan pelagis yang banyak hidup diperairan Nusa Utara. Ekstraksi KPI umumnya dilakukan dengan menggunakan pelarut etanol. Penelitian ini bertujuan mengkarakterisasi sifat fisiko-kimia konsentrat protein ikan yang diekstrak dari ikan sunglir. Penggunaan etanol 90% dalam mengekstraksi konsentrat protein dari ikan sunglir menghasilkan rendemen berkisar 18-20%. Hasil Penelitian menunjukkan bahwa konsentrat protein ikan sunglir memiliki kandungan protein yang tinggi dan memiliki kadar lemak yang rendah. Konsentrat protein dengan kadar protein >65% dan kadar lemak <3% tergolong sebagai konsentrat protein Tipe B sesuai dengan standar Mutu FAO 1976 tentang KPI. Hasil pengujian fisik menunjukkan bahwa KPI memiliki kemampuan penyerapan air, lemak dan densitas kamba yang cukup baik untuk diaplikasikan ke dalam bahan panganFish serve as an important source of animal protein with better digestibility and higher content of essential amino acids than other sources of animal protein. Elagatis bipinnulatus or sunglir in Indonesian is a common pelagic fish caught in Sangihe Islands. FPC is commonly extracted with etanol. Therefore, this research aims to characterise the physicochemical properties of the FPC extracted from rainbow runner. The use of 90% ethanol for exraction of FPC from rainbow runner resulted in 18-20% yield. The result shows that the local rainbow runner contained FPC with high level of protein (77.34%) but low level of fat (1.22%), classified as type B on the basis of FAO’s standard on FPC Protein, which stipulated FPC with >65% protein and <3% fat content as Type B. In addition, physical analysis proved that FPC has appropriate water and fat absorption abilities as well as kamba density, suitble for food substitute or fortification

Strength Assessment of Jacket Offshore Wind Turbine Support Structure Accounting for Rupture1

2019 ◽  
Vol 142 (1) ◽  
Author(s):  
Baran Yeter ◽  
Yordan Garbatov ◽  
C. Guedes Soares
Keyword(s):  
Wind Turbine ◽  
Low Cycle Fatigue ◽  
High Stress ◽  
Offshore Wind ◽  
Offshore Wind Turbine ◽  
Small Scale ◽  
Support Structures ◽  
Support Structure ◽  
Strength Assessment ◽  
High Stress Concentration

The objective of the present work is to carry out the strength assessment of jacket offshore wind turbine support structures subjected to progressive rupture. A defect existing in a structure made during the fabrication may turn into a small-scale rupture and because of the high-stress concentration and low-cycle fatigue load. Therefore, the ultimate load-carrying capacity of the support structure is analyzed accounting for the progress of the rupture until the leg component experiences a full rupture along its circumference. The effect of imperfection severity is also investigated. The moment–curvature relationship of the structure concerning the studied cases is presented. Furthermore, the jacket support structures, at different water depths, are also analyzed and discussed. Finally, some of the leg components are removed one by one to study the redundancy of the jacket support structure at 80-m water depth.

Developing a Standard Code for Spent Fuel and High Level Waste Containment Baskets

2008 ◽  
Author(s):  
Donald Wayne Lewis
Keyword(s):  
Radioactive Material ◽  
High Level Waste ◽  
Plant Design ◽  
Support Structures ◽  
Spent Fuel ◽  
Waste Containment ◽  
Internal Support ◽  
Division 1 ◽  
High Level ◽  
And Storage

ASME Section III, Division 3, “Containments for Transportation and Storage of Spent Nuclear Fuel and High Level Radioactive Material and Waste” currently addresses the design of transportation and storage containment shells but it has yet to address the containment internal support structure that holds the spent fuel or high level waste in place. However, the code for internal support structures, hereafter referred to by its common name “basket”, has been under development by ASME for the past 2 years. Development of the new code, to be known as Subsection WD, “Internal Support Structures” was deemed necessary because current containment system basket construction is a piecemeal approach using ASME Section III, Division 1, Subsection NF, “Supports” and/or ASME Section III, Division 1, Subsection NG, “Core Support Structures” or some other engineering method. Approvals for the various combinations are granted from the regulatory authority. The piecemeal approach tries to capture the critical elements important for a containment basket. However, Subsections NF and NG are based on nuclear power plant design which has different design goals than for a spent fuel or high level waste containment. The issuance of Subsection WD will ensure standardization of future containment baskets, assist the regulatory agency in the review and approval of the baskets, and ensure that the essential criteria in the basket related to spent fuel and high level waste storage transportation and disposal is adequately addressed. The purpose of the basket is primarily to ensure that the radioactive components in the containment are supported in a way as not to create a criticality event. Current acceptance is typically based on a no yield design that the containment manufactures all say is too conservative and based on unreasonable criteria. What should the basket design be based on, how should Subsection WD address them, etc.? The purpose of this paper is to inform interested parties of the progress that has been made in development of Subsection WD, what construction provisions it will initially include and what is planned for it, and when is it scheduled to be issued.

Automated Assessment of Ultimate Hull Girder Strength

2003 ◽  
Vol 125 (3) ◽  
pp. 211-218 ◽  
Author(s):  
M. J. Smith ◽  
N. G. Pegg
Keyword(s):  
Ultimate Strength ◽  
Progressive Collapse ◽  
Three Dimensional ◽  
Strength Analysis ◽  
Cross Sectional ◽  
Strength Assessment ◽  
Hull Girder ◽  
Single User Interface ◽  
Interaction Curves ◽  
The Uk

An automated approach to ultimate hull girder strength assessment using DRDC’s ultimate strength analysis suite (ULTSAS) is described. The analysis suite improves the ability to perform rapid ultimate strength assessments by providing access to UK and Canadian analysis codes and databases under a single user interface. The interface also allows for automatic cross-sectional model generation from three-dimensional ship finite element models with the MGDSA program. The main features of the ULTSAS system are described, including cross-sectional modelling, and the use of load-shortening curve databases. The paper also provides a review of the progressive collapse method for determining ultimate strength, which is now used in both the UK and Canadian analysis codes. Two numerical approaches are described, one based on curvature incrementing and the other on moment incrementing. It is shown that the moment incrementing procedure produces more accurate bi-axial interaction curves in some instances. Results are obtained for two damage configurations of the HALIFAX class frigate.

Strength Analysis of Pressure Vessel with Big Openings

2012 ◽  
Vol 490-495 ◽  
pp. 2719-2722
Author(s):  
Yan Li Huang ◽  
Shi Jie Wang ◽  
Hai Peng Ru ◽  
Bing Ji Zhao
Keyword(s):  
Pressure Vessel ◽  
Complex Stress ◽  
Pressure Vessels ◽  
Complex Stress State ◽  
Strength Analysis ◽  
The Finite Element Method ◽  
Strength Assessment ◽  
Pressure Area ◽  
Force Characteristics ◽  
Special Process

Due to the special process requirements, sometimes the big openings are needed for pressure vessels, which will form a complex stress state in the opening edge. But there is not a perfect design specification accepted by international for the pressure vessels with big openings, therefore detailed stress analysis and strength assessment are absolutely necessary. In this paper, in order to ensure that the structure of a pressure vessel with big openings which is calculated by pressure area method is correct, the finite element method has been used to perform strength analysis. Force characteristics and stress distribution are obtained. The intensity evaluation result shows that the structure is correct.

scholarly journals CREDIT CAPACITY ASSESSMENT OF COMMERCIAL BANK BORROWER

2019 ◽  
pp. 93-100
Author(s):  
A. Bondarenko ◽  
M. Moiseienko ◽  
V. Gordienko ◽  
O. Dutchenko
Keyword(s):  
Credit Risk ◽  
Accurate Determination ◽  
Integral Model ◽  
Risk Indicator ◽  
Probability Of Default ◽  
Financial Condition ◽  
Wide Range ◽  
Banking Institution ◽  
High Level

The purpose of the article is to study the essence of solvency of the enterprise, to determine the approaches to assessment and analysis of solvency. Since the assessment of the borrower's solvency is the key to the successful functioning not only of the financial and credit institution, but also of the enterprise itself, so in the conditions of formation and development of market relations lenders need to have an accurate idea of the borrower's solvency. Relevance of the research topic is explained by the fact that today the solvency of the enterprise requires a thorough and comprehensive research in terms of the solvency of enterprises and the development of a scientific justification for a common algorithm that borrowers can use to calculate their credit obligations. Today, there is no single algorithm for determining a borrower's solvency. Each banking institution uses its own methodology, which, in its opinion, is the most effective and takes into account a wide range of financial indicators. According to the valuation specificity for the assessment of legal entities regulated by the NBU, determining the borrower's solvency involves analyzing its financial and economic characteristics Requirements of the Regulations on the determination of the size of credit risk by the banks of Ukraine established the calculation of the credit risk indicator, which provides for the definition of the integral indicator, calculation of the borrower's financial class and the probability of default. Within the limits of the given research the complex estimation of Technologia JSC solvency has been carried out, by results of which the quantitative indicators received as a result of construction of the integral model, are included into the range of values corresponding to the second class of the borrower. Calculation of the overall qualitative indicator confirmed the high level of solvency of the studied enterprise, with a minimum probability of default. In order to improve the quality of the solvency assessment of the borrower we propose, in further studies, to consider the competitiveness of the enterprise as a factor of more accurate determination of its financial condition and solvency. Keywords: solvency, borrower, financial standing, financial factors.

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