飞艇艇体与推进支架结构耦合动力学仿真分析

发布时间：2018-04-23 17:48

本文选题：飞艇 + 刚柔耦合结构　；参考：《计算机仿真》2016年11期

【摘要】：针对推进器支架安装在艇体两侧式布局的软式飞艇,研究飞艇艇体与推进支架结构的动力学特性。通过建立飞艇艇体与推进器支架结构的有限元模型,分析不同艇体内压下,艇体与推进支架结构系统的模态特性,以及结构系统在推进螺旋桨不同转速下的动力响应,最终得到艇体与推进支架结构的固有频率、振型及响应函数随艇体内压的变化关系。仿真结果表明飞艇艇体的存在使得整个结构系统的固有频率降低,产生耦合振动。最后结合分析结果对艇体与推进支架结构设计提出了建议。
[Abstract]:The dynamic characteristics of the airship and propulsive support structure were studied for the soft airship with propeller support mounted on both sides of the hull. By establishing the finite element model of the airship hull and propeller support structure, the modal characteristics of the hull and propulsive support structure system under different hull pressure are analyzed, and the dynamic response of the structure system under different speeds of propeller is analyzed. Finally, the relationship between the natural frequency, mode shape and response function of the hull and the propulsion support structure with the internal pressure of the hull is obtained. The simulation results show that the natural frequency of the whole structure system is reduced and the coupling vibration is produced by the existence of the airship hull. Finally, some suggestions on the structure design of the hull and propulsive support are put forward based on the analysis results.
【作者单位】：中国科学院光电研究院;中国科学院大学;
【分类号】：V274

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