A New Modal Testing Technique for Light-weight Large Flexible Cable-net Structure

Du Dahua; He Erming; Wang Hui; Huang Hong

doi:10.13433/j.cnki.1003-8728.20180113

Volume 37 Issue 8

Aug. 2018

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Article Navigation > Mechanical Science and Technology for Aerospace Engineering > 2018 > 37(8): 1267-1271

Du Dahua, He Erming, Wang Hui, Huang Hong. A New Modal Testing Technique for Light-weight Large Flexible Cable-net Structure[J]. Mechanical Science and Technology for Aerospace Engineering, 2018, 37(8): 1267-1271. doi: 10.13433/j.cnki.1003-8728.20180113

Citation:

Du Dahua, He Erming, Wang Hui, Huang Hong. A New Modal Testing Technique for Light-weight Large Flexible Cable-net Structure[J]. Mechanical Science and Technology for Aerospace Engineering, 2018, 37(8): 1267-1271. doi: 10.13433/j.cnki.1003-8728.20180113

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A New Modal Testing Technique for Light-weight Large Flexible Cable-net Structure

doi: 10.13433/j.cnki.1003-8728.20180113

Du Dahua^1,2,
He Erming^{1
,
,},
Wang Hui³,
Huang Hong²

1.
College of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China;
2.
National Key Laboratory of Science and Technology on Liquid Rocket Engine, Xi'an 710100, China;
3.
Xi'an Institute of Space Radio Technology, Xi'an 710100, China

Received Date: 2017-07-02
Publish Date: 2018-08-05

Abstract

Abstract

According to the structural features and dynamics characteristics of light-weight large flexible space cable-net antenna, a new modal testing technique is proposed in this study. A non-contact pneumatic excitation system is designed and applied to excite vibration, which is suitable for cable-net structure. The 3D scanning laser Doppler vibrometer (3D SLDV) is used to conduct non-contact vibration measurement. The structural modal parameters of cable-net antenna are identified based on the time domain modal analysis method of random decrement technique (RDT) combined with Ibrahim time domain method (ITD). As an extension to conventional modal test methods, the current technique has successfully obtained the vibration modes of a light-weight large flexible cable-net structure, showing a promising prospect of applications.
- Non-contact excitation,
- 3-D scanning,
- laser Doppler vibrometer,
- flexible cable-net,
- modal test

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References(15)

References

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