Shouwei Hu, Yong Zhang, Yuefei Wang, You Wang. Concept design for the main structure of 30 m Chinese Future Giant Telescope[J]. Opto-Electronic Engineering, 2022, 49(6): 210402
- Opto-Electronic Engineering
- Vol. 49, Issue 6, 210402 (2022)
Fig. 1. Rendered images for the extremely large telescopes. (a) Thirty Meter Telescope; (b) Extremely Large Telescope; (c) Giant Magellan Telescope
Fig. 2. Design and optimization of trussed supporting structure for the primary mirror of TMT
Fig. 3. Steel frame bridge supporting structure for the primary mirror of E-ELT
Fig. 4. Sheet metal welding support structure for the primary mirror of GMT
Fig. 5. Concept design for the main truss structure of 30 m CFGT
Fig. 6. Concept design for the primary M1 cell structure of 30 m CFGT telescope
Fig. 7. Mode shapes for pointing to zenith. (a) Mode 1, 2.3 Hz; (b) Mode 2, 2.4 Hz; (c) Mode 3, 2.5 Hz
Fig. 8. Mode shapes for pointing to horizon. (a) Mode 1, 2.1 Hz; (b) Mode 2, 2.2 Hz; (c) Mode 3, 2.4 Hz
Fig. 9. Original elevation lateral bearings hydraulic whiffletree
Fig. 10. Latest elevation lateral bearings hydraulic whiffletree arrangement
Fig. 11. Gravitational deformation distributions pointing at zenith and horizon. (a) Pointing to zenith; (b) Pointing to horizon
Fig. 12. Relative deformation along Z-axis and equivalent stress for the trussed supporting structure of the primary mirror M1. (a) Relative deformation along the Z-axis; (b) Equivalent stress
Fig. 13. Displacement distribution due to temperature and static wind for configuration. (a) Temperature gradient of 0.12 °C/m along the Z-axis; (b) Static wind 10 m/s
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Table 1. Spring stiffnesses used in finite element model
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Table 2. Eigenfrequencies for the CFGT telescope pointing at zenith
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Table 3. Eigenfrequencies for the CFGT telescope pointing at horizon
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Table 4. Comparison about dominant modal eigenfrequencies for the extremely large telescopes
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