Prestress Analysis of Flat Steel Ribbon-Wound Vessel

1993 ◽  
Vol 115 (2) ◽  
pp. 171-176 ◽  
Author(s):  
P. S. Huang ◽  
G. B. Zhu ◽  
R. Barron
Keyword(s):  
Theoretical Model ◽  
Pressure Vessel ◽  
Inner Core ◽  
Full Scale ◽  
Experimental Results ◽  
New Type ◽  
Flat Steel ◽  
Thin Walled ◽  
Steel Ribbon

The flat steel ribbon-wound vessel is a relatively new type of wound pressure vessel. This type of vessel consists of a thin-walled inner core and helically wound flat steel ribbons. The outstanding safety in service of this type of vessel is due, in part, to the large circumferential and axial prestresses introduced during the ribbon-winding process. This paper presents a model for determination of prestresses in such a vessel. The model considers the fabrication procedures producing the prestress in the vessel. Experimental results from tests using full-scale vessels are presented. Agreement between the theoretical model and the experimental results is excellent.

Construction of Pressure Vessel Using Thin Inner Shell Wound Cross-Helically by Interlocking Strips

2009 ◽  
Author(s):  
Chen Ping
Keyword(s):  
Pressure Vessel ◽  
Thin Shell ◽  
Steel Strip ◽  
Cost Effective ◽  
Traditional Structure ◽  
New Type ◽  
Flat Steel ◽  
Manufacturing Methods ◽  
Type Pressure ◽  
Steel Ribbon

This paper describes the construction of a new type pressure vessel using thin shell cross-helically wound interlocking steel strip, based on the technologies of interlocking strip-wound developed by Germany and flat steel ribbon wound by China which are code cases listed in ASME BPVC. Analysis and comparison between the new and the traditional structure types, and discussion on issues such as their stress characteristics, operation safety and manufacturing methods etc. are presented. It shows this new method of pressure vessel construction is feasible, cost effective, and well deserved of further studies.

A more accurate method for predicting the stresses in a flat steel ribbon wound pressure vessel

1999 ◽  
Vol 213 (8) ◽  
pp. 787-793 ◽  
Author(s):  
J Y Zheng ◽  
P Xu ◽  
L Q Wang ◽  
G H Zhu
Keyword(s):  
Pressure Vessel ◽  
Accurate Method ◽  
Pressure Vessels ◽  
Friction Model ◽  
Interfacial Friction ◽  
Division 1 ◽  
Helical Winding ◽  
Section Viii ◽  
Flat Steel ◽  
Steel Ribbon

Flat steel ribbon wound pressure vessels have been adopted by the ASME Boiler and Pressure Vessel Code, Section VIII, Division 1 and Division 2. An excellent safety and service record has been built up in the past 34 years. Based on the interfacial friction model proposed by Zheng [1], a more accurate method for predicting the stresses in a flat steel ribbon wound pressure vessel is offered in this paper, taking account of the axial displacement, the change in the helical winding angle, the interfacial friction between ribbon layers and the effect of lamination. Comparison between experimental results of five test vessels with an inside diameter varying from 350 to 1000 mm, four different helical winding angles (18, 24, 27 and 30°), two width—thickness ratios of the ribbon (20 and 22.86) and results of calculation using the stress formulae available demonstrates that the method in this paper is more accurate and that interfacial friction gives a marked strengthening contribution to the axial strength of the vessel.

The mixed phase of gearbox synchromesh operation

2000 ◽  
Vol 214 (2) ◽  
pp. 157-165 ◽  
Author(s):  
B Paffoni ◽  
R Progri ◽  
R Gras
Keyword(s):  
Theoretical Model ◽  
Friction Coefficient ◽  
Axial Force ◽  
Mixed Phase ◽  
Experimental Results ◽  
Second Stage ◽  
Initial Values ◽  
Variable Friction ◽  
Three Stages

Earlier studies allowed the present authors to divide the period of synchronization into three stages of operation: viscous, mixed and dry. Expressions for estimating the pressure, axial, force, torque and friction coefficent were obtained. This investigation allows the determination of the initial values necessary for the study of the second stage presented here. The second stage occurs in the presence of a variable friction coefficient for which a model is proposed. The influence of the variable friction coefficient on the velocity and duration of synchronization is presented. The theoretical model is compared with experimental results.

Analysis of Controllable Stress Distribution and Optimal Design of Flat Steel Ribbon Wound Pressure Vessel

2000 ◽  
Vol 122 (2) ◽  
pp. 186-191 ◽  
Author(s):  
Zheng Chuanxiang
Keyword(s):  
High Pressure ◽  
Optimal Design ◽  
Stress Distribution ◽  
Pressure Vessel ◽  
Vessel Wall ◽  
High Pressure Vessel ◽  
Flat Steel ◽  
Winding Angle ◽  
Steel Ribbon

Stress distribution of high pressure vessel wall is not even. How to appropriately distribute stresses on high pressure vessel wall is our goal. It can be realized in flat steel ribbon wound pressure vessel (FSRWPV). The paper shows that stress can be distributed in someway on FSRWPV wall by controlling prestress and winding angle of its flat steel ribbon. An example is given at the end. [S0094-9930(00)00902-1]

scholarly journals Silver nanoparticles enhanced fluorescence for sensitive determination of fluoroquinolones in water solutions

2019 ◽  
Vol 17 (1) ◽  
pp. 884-892 ◽  
Author(s):  
Hongling Wang ◽  
Xuejing Si ◽  
Tunhua Wu ◽  
Ping Wang
Keyword(s):  
Silver Nanoparticles ◽  
Experimental Results ◽  
Separate Determination ◽  
Enhanced Fluorescence ◽  
Toxic Compounds ◽  
Water Solutions ◽  
Fluorescence Methods ◽  
New Type ◽  
Sensitive Determination

AbstractA new type of silver nanoparticle (AgNPs) was prepared with simple and fast methods and low-toxic compounds. With the addition of different concentrations of AgNPs, the effects of AgNPs on the fluorescence properties of three different kinds of fluoroquinolones (enrofloxacin ENR, lomefloxacin LMF and norfloxacin NOR) in water solutions were studied, respectively. The experimental results demonstrated that the fluorescence intensity for each of the fluoroquinolones (FQ)was firstly enhanced and then quenched with the increased concentration of AgNPs in water solutions. The possible mechanisms about the AgNPs on the fluorescence behaviors of each FQ were also investigated, respectively. In addition, new silver enhanced nanoparticles materials fluorescence methods were established for the separate determination of ENR, LMF and NOR in water solutions. As compared with the identical control fluorimetric methods with no addition of AgNPs, the new enhanced fluorimetic methods were also investigated, respectively. The experimental results indicated that the new enhanced methods could detect lower concentrations of ENR, LMF and NOR in water solutions. Moreover, the newly enhanced fluorimetric methods were validated and successfully applied for the quantitative assay of ENR, LMF and NOR in different kinds of medicinal preparations, respectively.

Heat-transfer analysis of flat steel ribbon-wound cryogenic high-pressure vessel

2008 ◽  
Vol 222 (9) ◽  
pp. 1745-1751
Author(s):  
Z P Chen ◽  
C L Yu ◽  
J Y Zheng ◽  
G H Zhu
Keyword(s):  
Heat Transfer ◽  
High Pressure ◽  
Pressure Vessel ◽  
Heat Transfer Process ◽  
Heat Transfer Analysis ◽  
Experimental Investigations ◽  
Transfer Model ◽  
High Pressure Vessel ◽  
Flat Steel ◽  
Steel Ribbon

In the past 40 years, more than 7000 layered vessels using flat ribbon-wound cylindrical shells have been manufactured in China. Theoretical as well as experimental investigations show that there are distinct economical and engineering advantages in using such vessels. In this paper, based on the analysis of the heat transfer process in a flat steel ribbon-wound liquid hydrogen high-pressure vessel, a heat transfer model of the walls of the shell and head has been set up. The temperature difference among the interfaces, the heat transfer through the shell and head, and the evaporation rate of the vessel under a steady heat-flow condition has been calculated. The numerical calculations show that such a structure meets the design requirements.

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