• INFRARED
  • Vol. 45, Issue 12, 26 (2024)
Yang-wen ZHANG, Xing SHEN, Xiao-mai HONG, Hai-ling CHENG..., Ren-xin CUI, Cheng-peng JIANG, Zhuo ZENG, Zhen-hua XU, Ming-chang LI, Xin LIU and Li HUANG*|Show fewer author(s)
Author Affiliations
  • Wuhan Guide Infrared Co, Ltd, Wuhan 430205, China
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    DOI: 10.3969/j.issn.1672-8785.2024.12.004 Cite this Article
    ZHANG Yang-wen, SHEN Xing, HONG Xiao-mai, CHENG Hai-ling, CUI Ren-xin, JIANG Cheng-peng, ZENG Zhuo, XU Zhen-hua, LI Ming-chang, LIU Xin, HUANG Li. Optimization Design Method of Cantilever Beam Structure ofInfrared Detector-Dewar Assembly[J]. INFRARED, 2024, 45(12): 26 Copy Citation Text show less

    Abstract

    In high-level vibration application scenarios, the cantilever beam structure of the infrared detector-dewar assembly is easily damaged. A non-contact helical spring support ring structure is designed. Between the dewar shell and the cold finger, the dewar heat leakage increased by the traditional strengthening scheme is greatly reduced through a non-contact method, and the vibration energy is converted into elastic potential energy, thereby reducing the stress impact of high-level vibration on the cold head. After simulation analysis and optimization with Ansys software, the maximum deformation of the platinum-iridium wire is 1.7 mm, which is 57.5% lower than the conventional structure; the maximum stress decreases by 52% to 307 MPa. Experimental results show that the average heat leakage after optimization increased by only 1%, while having significantly improved vibration resistance. The assemblies with conventional structures would experience platinum-iridium wire breakage after enduring 15 grms durable random vibration, while the optimized assemblies can withstand 15 grms durable random vibration and 17.6 grms short-term high-level random vibration. The optimized assemblies keep the detector focal plane temperature stable during 17.6 grms random vibration without affecting their normal operation.
    ZHANG Yang-wen, SHEN Xing, HONG Xiao-mai, CHENG Hai-ling, CUI Ren-xin, JIANG Cheng-peng, ZENG Zhuo, XU Zhen-hua, LI Ming-chang, LIU Xin, HUANG Li. Optimization Design Method of Cantilever Beam Structure ofInfrared Detector-Dewar Assembly[J]. INFRARED, 2024, 45(12): 26
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