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拖曳天线在空中的构型及垂直度是检验天线能否正常发射甚低频信号的主要依据,是设计人员必须着重考虑的因素。通过对其运动状态及其受力进行分析,建立机载甚低频拖曳天线动力学模型。针对其稳态动力学模型,运用Newton-Raphson迭代进行求解,计算出了天线垂直构型和天线的张力分布情况。通过与AD报告计算结果进行比较,证明所建立的动力学模型是可信的。最后分析了空气系数和天线末端质量对天线垂直构型和天线张力分布的影响。
The configuration and verticality of the towing antenna in the air are the main basis for testing whether the antenna can normally transmit very low frequency signals and are the factors that designers must pay attention to. By analyzing the state of motion and its force, the dynamic model of airborne very low frequency towed antenna is established. According to the steady-state dynamics model, the Newton-Raphson iteration is used to solve the problem. The vertical configuration of the antenna and the tension distribution of the antenna are calculated. By comparing with the result of AD report, it is proved that the established dynamic model is credible. Finally, the influence of the air coefficient and antenna tip quality on the antenna vertical configuration and antenna tension distribution is analyzed.