Infrared and Laser Engineering, Volume. 49, Issue 8, 20200060(2020)
Cold head supporting structure of Dewar used in large infrared focal plane
Figures & Tables(11)
Fig. 7. Random vibration curve of glass fiber support structure (5 Grms)
Table 1.
Stiffness parameter of glass giber support structure
玻璃纤维束支撑结构的刚度参数
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Stiffness parameter of glass giber support structure
玻璃纤维束支撑结构的刚度参数
Tensile stiffness/N Bending stiffness /N·m2 Glass fiber 1.963×105 0.012 2
Table 2.
Capability of fibers
纤维材料性能
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Capability of fibers
纤维材料性能
Thermal conductivity/ W·(m K)−1 Tensile strength/ GPa Glass fiber 0.046 2.43 Polyimide fiber 0.35 3.6 Carbon fiber (M40) 20 4.43
Table 3.
Thermal resistance of different support structures of cold head
冷指不同支撑结构的热阻
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Thermal resistance of different support structures of cold head
冷指不同支撑结构的热阻
Length /mm Area /mm2 Thermal conductivity /W·(m K)−1 Thermal resistance /K·W−1 Glass fiber support structure 40 0.785 0.046 1 107 726.39 Metal pole support structure 40 8.635 15.6 296.94
Table 4.
Mechanical analysis results of Dewar
杜瓦组件力学分析结果
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Mechanical analysis results of Dewar
杜瓦组件力学分析结果
Frequency/Hz Magnification Stress of pulse tube/MPa Glass fiber support structure 370 4.2 1.08 Metal pole support structure 231 4.9 18
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Fang Chen, Chao Gao, Shikui Luo. Cold head supporting structure of Dewar used in large infrared focal plane[J]. Infrared and Laser Engineering, 2020, 49(8): 20200060
Paper Information
Category: 红外技术及应用
Received: Feb. 5, 2020
Accepted: --
Published Online: Dec. 31, 2020
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