外形隐身技术是提高舰船生存力的重要手段，为研究对舰船电磁散射特性的影响，以典型舰船为基础，建立了考虑外形隐身前后的舰船电磁模型A，B，提出了RCS算术均值相对增值的概念。采用物理光学法，计算了不同俯仰角、不同入射频率下的RCS曲线，分析了2种舰船模型RCS曲线分布特点、俯仰角和频率变化关系，研究了外形隐身改进的电磁散射特性影响。结果表明，RCS曲线分布形式决定于舰船外形结构特点，俯仰角变化将导致散射波峰幅值和位置发生变化，频率增加时曲线震荡性增加且幅值减小；外形隐身改进主要影响前向角域，频率增加时相对增值增加，俯仰角变化相对增值呈震荡趋势。研究结果对舰船外形隐身设计有参考意义。
Shaping stealth technology is an important means to improve the warship’s survivability. In order to study the impact on electromagnetic scattering characteristics of the warship, two warship electromagnetic models A and B were established with consideration of shaping stealth. The definition of relative value based on RCS arithmetic mean was proposed. The RCS curves in different pitch angles and incident frequencies were calculated by Physical Optics method. The relationship among RCS curves’ distribution characteristics with pitch angle and frequency variation of two models was analyzed, and the influence of improved shaping stealth on electromagnetic scattering characteristics was also studied. The results show that the RCS curves distribution is determined by warship’s shape and structure. The variation of pitch angle can lead to the change of scattered wave’s amplitude and position, and the curve concussion improves and its amplitude decreases with the increase of frequency. Improved shaping stealth mainly affects the angle domain in nose direction. The relative value increase with increase of frequency, and the value oscillates when pitch angle increases. The research results have reference meaning to the design of warship's shaping stealth.
2020,42(7): 120-124 收稿日期：2019-02-01
DOI：10.3404/j.issn.1672-7649.2020.07.025
分类号：TN011;U662
基金项目：国家自然科学基金资助项目(11702255)；航空科学基金资助项目(2016ZA55001，2015ZD55005)；河南省科技攻关计划资助项目(182102210444，162102210089，152102210137)；郑州航空工业管理学院青年骨干教师资助计划资助项目(2017-12)；郑州航空工业管理学院校青年科研基金资助项目(2017153003)
作者简介：刘战合(1977-),男,博士,副教授,主要从事飞行器隐身设计
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