机载拖曳体动力学建模及分析

在某些航空应用场景，需要通过飞行器拖曳功能性部件完成特定性任务，例如机载拖曳对潜通信天线等，在这些应用中，通过建立科学的模型和方法，准确地分析稳态、动态特性是保证拖曳体正常工作的前提条件。本文以对潜通信天线为例，建立考虑天线气动力、惯性力以及弹性力的多体动力学的机载天线动力学模型，并对该模型的稳态结果进行算例验证；对考虑载机非定常运动以及突风作用等扰动后的天线系统动态响应进行分析，并对天线断裂等极端情况进行评估。结果表明：本文所建立的模型在垂直度、天线张力等方面的分析结果较好，能够应用于航空拖曳体的稳态及动态特性分析，在对潜通信天线、加油管等系统的设计方面有一定的工程价值。

Dynamic modeling and analysis of airborne towed objects

In order to perform specific missions, functional components should be towed by aircrafts, such as airborne trailing submarine communication antenna, etc. In these applications, the establishment of scientific models and methods to accurately analyze the steady and dynamic characteristics is a prerequisite to ensure the normal operation of the towed objects. Dynamic model considering aerodynamic force, inertia force, and elastic force of airborne antenna system is established and verified through published steady state results. Dynamic response of the antenna system under disturbance of aircraft unsteady motion and gust is studied, and the extreme conditions such as antenna fracture are evaluated. The results indicate that the analysis results of verticality and tension of the model established in this paper are good, which can be applied to the analysis of the steady and dynamic characteristics of air towed objects, and has engineering value in the design of submarine communication antenna, refueling pipe and other systems.