外文翻譯--使用ansys對sst-1真空容器和低溫恒溫容器裝配體進行熱結構分析

1、Fusion Engineering and Design 84 (2009) 1708–1712Contents lists available at ScienceDirectFusion Engineering and Designjournal homepage: www.elsevier.com/locate/fusengdes Thermal structural analysis of SST-1 vacuum ve

2、ssel and cryostat assembly using ANSYSProsenjit Santra a,? , Vijay Bedakihale a , Tata Ranganath ba Institute for Plasma Research, Bhat, Gandhinagar 382428, Gujarat, India b Tractebel Engineers fax: +91 7923962277.

3、E-mail address: prosenjit@ipr.res.in (P. Santra).the inner wall of VV, ICR and ports. The hot nitrogen enters the sys- tem through two inlet headers, covers different part of VV/ICR/ports and exits through two outlet h

4、eaders.1.2. Cryostat (CS)SST-1 cryostat is a 16-sided polygon shaped outer VV made of SS 304L which encloses plasma chamber (VV) TF/PF coils and LN2 thermal radiation shields. Cryostat provides high vacuum barrier arou

5、nd plasma VV and surrounding cold mass and isolates super conducting coils from ambient pressure and temperature. Cryostat has openings for 16 radial ports, and 32 vertical ports of SST-1. It is mounted on a base fram

6、e and provides structural support for VV, in-vessel components, cooling circuits and cold mass.2. SS 304L material property detailsThe details of the structural material SS 304L of which the SST-1 VV/CS is made of are m

7、entioned in Table 1. As a post-fabrication FE analysis is being attempted with existing material test reports, tensile/yield stress, elongation values, from material test reports are considered here.0920-3796/$ – see

8、front matter © 2009 Elsevier B.V. All rights reserved. doi:10.1016/j.fusengdes.2009.01.042P. Santra et al. / Fusion Engineering and Design 84 (2009) 1708–1712 1709Fig. 1. Iso metric cut view of SST-1.3. Solid and f

9、inite element (FE) model of VV/CSThe thermal structural analysis of SST-1 VV/CS was carried out using finite element package ANSYS [3]. As SST-1 VV/CS is symmetric in toroidal direction (16 identical ports/cryostat) wit

10、h symmetric loadings, only 1/16th [4,5] is modeled for coupled thermal structural analysis taking advantage of mirror symme- try thereby reducing model size and minimum use of computer resources. Only the portion

11、 of the baking channels welded to the VV/ring is considered for analysis. 3D thermal Shell 57 and 3D Shell 41 were chosen for thermal analysis and structural analysis for meshing areas. 3D Link 34 for thermal convecti

12、on analysis and 3D Beam 4 were chosen for structural analysis of baking channels. The 1/16th solid model (Fig. 2a) has 463 key-points, 654 lines and 231 areas while the 1/16th FE model (Fig. 2b) has 8948 nodes and 1

13、6,379 elements. The thickness of various components of VV/CS as input for real constants of shell and beam in ANSYS elements is mentioned in Table 2.4. Boundary and loading conditions4.1. Boundary conditions (BC)As 1/1

14、6th is modeled for FE analysis therefore symmetric BC was applied at outer most edges of ICRs, lip joints, cryostat and support column. Symmetric BC implies that in plane rotations and out of plane translations are zer

15、o. Also the base and top of inner wall ofTable 1 Material properties of SS 304L.SI. no. Material specifications Typical valuesFig. 2. (a) Solid model of SST-1 VV/CS and (b) FE model of SST-1 VV/CS.cryostat and column ba

16、se are completely restrained in all DOF to prevent any un-constrained movement. Baking channels in rings and vessel sector are completely restrained in all DOF to prevent any unconstrained movement.Table 21 Young’s Mo

17、dulus (N/mm2 )196200 Thickness of various VV/CS components of SST-1.SI. no. Component/geometry name Thickness (mm)2 Poissions ratio 0.293 Density (kg/mm3 ) 0.8E-05 1 Vessel sector 104 Coefficient of thermal expansion (

18、mm/mm/? C)5 Thermal conductivity (W/mm K)17 × 10?060.0163 and 0.0214 at 25 ? C and 500 ? C2 Vessel port bed 063 Vessel port flange 304 Vessel top and bottom port 065 Vessel interconnecting ring 106 Lip joint 036

19、Specific heat (J/kg K) 500 and 563 at 25 ? C and 400 ? C7 Emissivity 0.11 (polished surface)8 Tensile strength (MPa) 554 (from material test certificate)9 Yield strength (MPa) 281 (from material test certificate)10 Elong