Infrared and Laser Engineering, Volume. 51, Issue 11, 20220232(2022)
New lightweight design method and application of main support structure in airborne infrared imaging system
Figures & Tables(20)
Fig. 2. Schematic diagram of position relation of main optical system
Fig. 3. Lightweight main support structure of titanium alloy material
Fig. 9. (a) First order mode shape; (b) Second order mode shape; (c) Third order mode shape
Fig. 10. (a) Curve of vibration analysis result; (b) Stress figure of sine vibration analysis
Fig. 11. Forming process flow chart of new lightweight main support structure
Table 1. The material parameters
View tableView in ArticleTable 1. The material parameters
Material Density/ 103 kg·m−3 Elastic modulus/GPa Poisson's ratio Linear expansion coefficient/10−6 K−1 SiC 3.05 400 0.18 2.5 Glass-ceramics 2.53 91 0.24 0.05 4J36 8.1 141 0.25 0.05 ZTC4 4.40 112 0.29 8.9 ZL114 2.80 70 0.33 23.6
Table 2. Comparison of physical and mechanical properties of modified cyanate resin castings
View tableView in ArticleTable 2. Comparison of physical and mechanical properties of modified cyanate resin castings
Performance Unmodified cyanate esters Modified cyanate esters Bending strength/MPa 90 127 Bending modulus/GPa 3.8 3.2 Tensile strength/MPa 52 73 Tensile modulus/GPa 3.4 3.2 Elongation at break 1.2% 3.4% Impact strength/kJ·m−2 7.3 16.4
Table 3. Performance parameters of M40 carbon fiber composites
View tableView in ArticleTable 3. Performance parameters of M40 carbon fiber composites
Performance Value Longitudinal modulus/GPa 90 Transverse modulus/GPa 3.8 Shear modulus/GPa 52 Poisson’s ratio 3.4 Density/103 kg·m−3 1.6 Axial linear expansion coefficient/10−6 K−1 0.76 e-6
Table 4. Weight of mass points
View tableView in ArticleTable 4. Weight of mass points
Name Weight/kg Image preprocessor 4.5 Third and fourth mirrors 3.0 Reflective optical system 14.5 Detector assembly 4.5
Table 5. Result of modal analysis
View tableView in ArticleTable 5. Result of modal analysis
Item Value First order frequency/Hz 415 Second order frequency/Hz 610 Third order frequency/Hz 793
Table 6. Conditions of sine vibration analysis
View tableView in ArticleTable 6. Conditions of sine vibration analysis
Frequency/Hz Magnitude (Y direction)/g 5−500 0.2
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Yanwei Li, Longhai Yin, Yulong Li, Xinwang Xie, Jingguo Zhang, Hongbo Xie. New lightweight design method and application of main support structure in airborne infrared imaging system[J]. Infrared and Laser Engineering, 2022, 51(11): 20220232
Paper Information
Category: Optical design
Received: Mar. 31, 2022
Accepted: --
Published Online: Feb. 9, 2023
The Author Email: Yin Longhai (ylh761208@163.com)
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