| 摘要: |
| 介绍了一种UHF波段的对数周期天线的结构优化设计。为了提高天线的整体刚度，使用张紧绳索优化天线结构。采用有限元方法分别对无绳索、张紧绳索加固的两种对数周期天线结构进行模态分析，结果发现，采用张紧绳索加固的天线结构刚度有了大幅度提升。通过计算得到了张紧绳索加固的天线结构在低量级振动条件下的加速度响应，并通过低量级振动试验进行了验证，证明了结构优化设计的合理性，为后续组合馈源阵的设计奠定了基础。 |
| 关键词: 对数周期 结构优化 张紧绳索 有限元 振动试验 |
| 基金项目:国家自然科学基金（U1737207） |
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| Structure Optimization and Mechanical Analysis of A Log-Periodic Antenna |
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Li Dongying He Kuishang Kong Lingbing Sun Ruifeng Liu Liangyu
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Shanghai Aerospace Electronic Technology Institute, Shanghai 201109
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| Abstract: |
| The structure optimization of a log-periodic antenna in UHF wave is introduced. To improve the holistic stiffness of the antenna, the structure is optimized by tension ropes. The modal analysis of two kinds of log-periodic antenna structures without rope and with tension ropes is carried out. The results show that the stiffness of the antenna structure strengthened by tension ropes has been greatly improved. The low-grade vibrate acceleration response of the antenna structure strengthened by tension ropes is analyzed and verified by low-grade vibration test, which provide the rationality of the structure optimization design and lay basis for follow-up combined design. |
| Key words: log-periodic structure optimization tension ropes FEM vibration test |
