Quasi modal test of large flexible structure based on electromagnetic dry wind tunnel

HOU Yingyu; LIU Ziqiang

doi:10.7638/kqdlxxb-2018.0162

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Quasi modal test of large flexible structure based on electromagnetic dry wind tunnel

更新时间：2026-05-28

- Quasi modal test of large flexible structure based on electromagnetic dry wind tunnel
- Vol. 37, Issue 1, Pages: 115-120(2019)
- 作者机构：
  
  中国航天空气动力技术研究院,北京,100074
- 作者简介：
- 基金信息：
- DOI：10.7638/kqdlxxb-2018.0162
  CLC： V211.3
- Published：2019
- 稿件说明：
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侯英昱, 刘子强. 基于电磁干风洞的大柔性结构准模态试验研究[J]. 空气动力学学报, 2019, 37(1): 115-120.

HOU Yingyu, LIU Ziqiang. Quasi modal test of large flexible structure based on electromagnetic dry wind tunnel[J]. 2019, 37(1): 115-120.
侯英昱, 刘子强. 基于电磁干风洞的大柔性结构准模态试验研究[J]. 空气动力学学报, 2019, 37(1): 115-120. DOI： 10.7638/kqdlxxb-2018.0162.

HOU Yingyu, LIU Ziqiang. Quasi modal test of large flexible structure based on electromagnetic dry wind tunnel[J]. 2019, 37(1): 115-120. DOI： 10.7638/kqdlxxb-2018.0162.

摘要

结构的频率是结构的重要动力学特性，对于飞行器来说，当机翼等大型结构在非定常气动力作用下发生变形时，其频率也会发生变化。本文介绍了一种地面电磁干风洞试验方法，利用电磁场和安培力实现气动力的模拟，在不接触模型的情况下对模型进行静动态加载。基于这种新的试验技术，建立了一种地面电磁干风洞实验方法，利用电磁场和安培力实现气动力的模拟，可有效实现对模型结构的非接触式静态和动态气动力跟随加载。利用该实验系统，研究了静动态条件下，结构质量、刚度分布对飞机内载荷的影响；结构变形对结构动力学特征的影响。结果表明，结构的弯曲变形会影响结构的弯曲和扭转频率，结构的质量和刚度分布会对结构内载荷产生较大影响。这种新的试验方法有利于研究大柔性结构的气动弹性特性，对新型飞机的设计和研制具有重要意义。

Abstract

The frequency of structures is an important dynamic characteristic. For aircrafts

when the wing and other large scale structures deform under the action of unsteady aerodynamic forces

its frequency correspondingly changes. For large structural flexible aircraft represented by high altitude long endurance UAVs

it is very important to explore the variation rules of the structural dynamic characteristics of the aircraft to develop the design technology and improve the design method. This paper introduces a test method of a ground electromagnetic dry wind tunnel. A principle experiment method of the ground electromagnetic dry wind tunnel is established. The electromagnetic field and Ampere force are used to realize the simulation of aerodynamics force

and the model is statically and dynamically loaded without touching the model. Based on this new test technique

a series of experiments were carried out by using the experimental system

and the influence of the structural quality and stiffness distribution was analyzed on the internal load of the aircraft under static and dynamic conditions. The results show that the bending deformation affects the bending and torsion frequencies of the structure

and the dynamic characteristics of the structure. This new test method is conducive to the study of aeroelastic characteristics of large flexible structures

and is of great significance for the design and development of new aircraft.

关键词

Keywords

references

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