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卫通平板天线被广泛应用于高机动性移动载体平台上,与传统天线结构布局方案相比,新型结构一体化设计方案优势明显。其在满足天线的使用功能要求的同时,提升了天线的结构性能。利用MSC软件建立天线的力学分析模型,对新型天线结构强度进行了校核。新型方案对其他站型天线的一体化设计具有一定的指导意义。 相似文献
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Effects of Raw Material Content on Efficiency of TiN Synthesized by Reactive Ball Milling Ti and Urea
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Ti and urea mixed according to the molar ratios of 2:1, 3:1 and 4:1 axe milled under the same condition. The structures of the as-synthesized powders are analyzed by an x-ray diffractometer (XRD). The decomposed temperature of the urea and the products decomposed are characterized by differential scanning calorimetry (DSC) and thermogravimetry analysis-Fourier transform infrared (TG-FTIR) spectrometry. The results show that the reaction progress is a diffusion reaction. The efficiency of TiN synthesized by reactive ball milling can be increased by increasing the content of Ti. The reactive ball milling time decreases from more than 90 h to 40 h correspond- ing to the content ratio between Ti and urea increasing from 2:1 to 4:1. Ammonia gas (NH3) and cyanic acid (HNCO), the decomposed products of urea, react with the refined Ti to form TiN. The grain refinement of Ti has a significant effect on the efficiency of reactive ball milling. 相似文献
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