Pre-conceptual design of DEMO upper port duct bellows

•Pre-conceptual study of the DEMO upper port duct bellows.•Bellows geometry and interface identification based on 2015 DEMO CAD model.•Identification and verification of load cases through FE thermal expansion analysis.•Development of bellows optimization tool based on available analytical procedure...

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Bibliographic Details
Published in:Fusion engineering and design 2018-11, Vol.136, p.1130-1134
Main Authors: Costa Garrido, Oriol, Končar, Boštjan, Brown, Richard, Bachmann, Christian
Format: Article
Language:English
Subjects:
Bellows
Computer simulation
Conceptual design
DEMO
Design
Design codes
Design optimization
Design standards
Expansion joints
Finite element
Finite element analysis
Finite element method
Mathematical analysis
Nuclear reactors
Parameter estimation
Parameter identification
Preliminary designs
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Summary:•Pre-conceptual study of the DEMO upper port duct bellows.•Bellows geometry and interface identification based on 2015 DEMO CAD model.•Identification and verification of load cases through FE thermal expansion analysis.•Development of bellows optimization tool based on available analytical procedures.•FE simulations of simple and complex bellows. This paper describes the first study on the DEMO upper port duct bellows. It aims at establishing the basis for their pre-conceptual design through available standardized analytical procedures and identify the bellows features where the analytical procedures fail and the detailed finite element (FE) analyses are required. The available analytical procedures have been found insufficient for the specific bellows design, considering the rather challenging size, load cases and non-standard trapezoidal shape of the DEMO upper port duct bellows. Although a properly verified design of the bellows cannot be provided at this stage, the development of an optimization tool has been initiated to identify a valid range of bellows parameters that fulfill the design constraints while optimizing their mass or length. The preliminary design results are presented and the shortcomings of the analytical tool identified through FE analyses of bellows performed with the ABAQUS code.
ISSN:0920-3796
1873-7196
DOI:10.1016/j.fusengdes.2018.04.088