【摘要】 针对某舰载天线在海洋大气环境中发生的渗水故障，通过湿热、盐雾及淋雨试验复现了故障现象。研究结果表明：原设计存在双重密封失效，外侧0.3 mm蒙皮因打磨修整导致微孔，内侧环氧胶因黏度过低未能封闭PMI泡沫微孔，二者耦合致使水分子沿孔隙渗入腔体。为此，提出了4项改进措施：采用环氧腻子封闭泡沫微孔，增厚侧棱蒙皮并设计专用工装，引入真空负压糊制工艺消除气泡，将漆面等级由Ⅲ级调整为Ⅳ级以避免过度打磨。经多批次生产与淋雨试验验证，改进后天线密封性能显著提升，未再发生渗水故障。该研究明确了渗水机理，提出的综合改进方案对同类装备防护设计具有重要参考价值。更多还原

【Abstract】 In response to the water seepage fault occurring on a certain shipborne antenna in marine atmospheric environment,the fault phenomenon was reproduced through damp-heat,salt spray and water spray tests.The research results showed that the original design presented dual sealing failure.The outer 0.3 mm covering generated micropores as a result of grinding and trimming,the inner epoxy adhesive failed to seal the micropores of PMI foam because of excessively low viscosity,and the coupling of the two made water molecules permeate into the cavity along the pores.For this purpose,four improvement measures were proposed:adopting epoxy putty to seal foam micropores,thickening the side edge covering and designing special tooling,introducing a vacuum negative pressure laminating process to eliminate air bubbles,and adjusting the paint surface grade from Grade III to Grade IV to avoid excessive grinding.After verification of multiple batches of production and water spray tests,the sealing performance of the improved antenna was significantly enhanced,and no water seepage faults occurred again.This study clarified the water seepage mechanism,and the proposed comprehensive improvement scheme possessed important reference value for the protection design of similar equipment.更多还原