斜掠气梁充气翼湿模态分析与试验  

Wet modal analysis and tests for inflatable wing with swept air-beams

作　　者：孟繁敏 马诺 马文朝 孟军辉 李文光[1] MENG Fanmin;MA Nuo;MA Wenchao;MENG Junhui;LI Wenguang(School of Aerospace Engineering,Beijing Institute of Technology,Beijing 100081,China;Key Laboratory of Dynamics and Control of Flight Vehicle of Ministry of Education,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]北京理工大学宇航学院,北京100081 [2]北京理工大学飞行器动力学与控制教育部重点实验室,北京100081

出　　处：《航空学报》2023年第2期222-236,共15页Acta Aeronautica et Astronautica Sinica

基　　金：国家自然科学基金(11902029)。

摘　　要：参考气动弹性剪裁思想,通过将充气翼内部气梁沿展向偏转一定角度设计一种新型斜掠气梁充气翼。针对充气翼结构动力学特性研究需要对考虑周围空气影响的湿模态进行分析,在考虑空气附加质量影响和流场对于系统刚度贡献的前提下,发展了一种针对柔性充气结构湿模态快速建模分析的附加质量-刚度法。在柔性充气管算例验证了所提方法有效性的基础上,完成了对传统直梁充气翼和斜掠气梁充气翼湿模态的仿真研究,并与地面振动试验(GVT)结果进行对比分析。结果表明,3种充气翼湿模态仿真结果与试验结果均吻合较好,充气翼结构固有频率随充气内压上升而增加,同时相比于传统直梁充气翼,斜掠气梁充气翼第1阶与第2阶模态具有更低的固有频率之比,且弦向模态能够显著消除,对改善充气翼飞行器的气弹性能具有重要意义。Based on the idea of aeroelastic tailoring,a new type of inflatable wings with swept air-beams is designed by deflecting the air beam inside the inflatable wing along the spanwise direction.The wet mode concerning the influence of ambient air is necessary for the research on the dynamic characteristics of inflatable wings,and a method named added mass-stiffness method considering the added mass and stiffness contribution of air is proposed to rapidly model and precisely analyze the wet mode of flexible inflatable structures.The proposed method is verified by an inflatable tube example,and applied to the traditional baffled inflatable wings and the new type with swept air-beams.The comparison between the simulation and Ground Vibration Test(GVT)results shows that the simulation results of three inflatable wings are in good agreement with the test results.The natural frequencies of the inflatable wings are on the rise with the increasing internal pressure,and for the new type of inflatable wings with swept air-beams,the natural frequency ratio of Mode 1 and Mode 2 is lower than that of the traditional baffled type,while the chordwise bending mode is also eliminated,which is valuable for improving the aeroelasticity of inflatable wings.

关 键 词：充气翼 动力学特性 湿模态 附加质量-刚度法 地面振动试验 

分 类 号：V216.21[航空宇航科学与技术—航空宇航推进理论与工程]