scholarly journals The design, construction, and testing of the vacuum vessel for the tandem Mirror Fusion Test Facility

1986 ◽  
Vol 4 (3) ◽  
pp. 1742-1748 ◽  
Author(s):  
Jerry W. Gerich
Author(s):  
Freddy L. Roberts ◽  
Louay N. Mohammad ◽  
Ludfi Djakfar ◽  
Amar Raghavendra

The Louisiana Transportation Research Center has recently completed the construction of a full-scale pavement test facility using the accelerated loading facility (ALF) machine. This facility contains nine pavement test sections, 12-m (38-ft) long and 3.66-m (12-ft) wide that are loaded by the ALF machine with loads ranging from 34.71 to 111.25 kN (7,800 to 25,000 lbf) on a dual-tire assembly. The advantage of this testing facility is its ability to cause a pavement to fail in a short period of time. In addition, the data acquisition methods and instrumentation used in this testing facility allow researchers to obtain reliable and representative performance data. The first test section has been loaded to failure and a preliminary analysis of the data is completed. VESYS 3A-M, a microcomputer version of the VESYS series, has been selected for the analysis due to its ability to predict damage and its flexibility. The analysis consists of the primary response analysis to determine strains, stresses, and deflection of the pavement and damage-prediction modeling that includes rutting, fatigue cracking, and roughness. The analysis was conducted by comparing the data obtained from field with that predicted by VESYS 3A-M. The performance data obtained from the field include fatigue cracking, rutting, and roughness. The analysis showed that VESYS 3A-M outputs are in good agreement with those obtained from the field.


1983 ◽  
Vol 4 (2P2) ◽  
pp. 206-211
Author(s):  
A. Suppan ◽  
I. N. Sviatoslavsky

1988 ◽  
Vol 13 (3) ◽  
pp. 503-509
Author(s):  
E. B. Hooper ◽  
Richard H. Bulmer ◽  
Larry L. Higgins
Keyword(s):  

Cryogenics ◽  
2017 ◽  
Vol 86 ◽  
pp. 22-29 ◽  
Author(s):  
T. Richter ◽  
S. Bobien ◽  
W.H. Fietz ◽  
M. Heiduk ◽  
R. Heller ◽  
...  

2017 ◽  
Vol 124 ◽  
pp. 558-561 ◽  
Author(s):  
K.A. Jadeja ◽  
S.B. Bhatt ◽  
Kulav Rathod ◽  
K.M. Patel ◽  
V.R. Prajapati ◽  
...  

Author(s):  
Jaydeep Joshi ◽  
Ashish Yadav ◽  
Roopesh Gangadharan ◽  
Mudalakeri Girish ◽  
Shino Ulahannan ◽  
...  

In the Indian Test Facility (INTF), a Vacuum Vessel is designed to house neutral beam components to provide transmission for length of ∼20 meters which enables characterization of neutral beam parameters. INTF Vacuum vessel is designed in cylindrical shape and has a detachable top-lid for mounting as well as removal of internal components during installation and maintenance phases of test facility. Principal challenges involved in this are designing the detachable top lid and positioning the appropriate stiffeners within the space available on the vessel for meeting functional and operational requirements of in-vacuum deflection to less than 5mm (0.196 in.) and it is limited to 1mm (0.039 in.) in certain areas on the vessel. Moreover, ASME code [3] does not have design formulation for this detachable top lid configuration directly, hence, there is a need to adopt the available recommendations ASME code [3], assess their applicability, adopt appropriate one, improvise and affect it and validate it by Finite Element Analysis (FEA). This paper presents the comprehensive design methodology adopted for INTF Vacuum Vessel design and optimization of various parameters to meet the operational and functional requirements within the constraints of other mandatory interfaces. This paper also presents its manufacturing plan, fabrication challenges and current status of vessel fabrication.


1989 ◽  
Vol 32 (5) ◽  
pp. 17-21
Author(s):  
Keith Maruya ◽  
Lorraine Ryan ◽  
Donald Fritz

To enhance its competitive edge in producing highly contamination-sensitive space systems, TRW has recently designed and constructed a large spacecraft assembly and test facility that is fully cleanroom compatible. Features of this facility include a large assembly and test area and a smaller support room that have HEPA-filtered vertical flow, dedicated staging areas for garment application, storage, and equipment preparation, and an automated cleanroom monitoring system (CRMS). A description of the design, construction, and certification process is given. Operational data from the CRMS and lessons learned are also presented.


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