一种轻质大柔性索网结构模态测试技术

杜大华; 贺尔铭; 王辉; 黄红

doi:10.13433/j.cnki.1003-8728.20180113

一种轻质大柔性索网结构模态测试技术

doi: 10.13433/j.cnki.1003-8728.20180113

杜大华^1,2,
贺尔铭^1, ,,
王辉³,
黄红²

1.
西北工业大学航空学院, 西安 710072;
2.
液体火箭发动机技术国防科技重点实验室, 西安 710100;
3.
西安空间无线电技术研究所, 西安 710100

基金项目:

国家自然科学基金青年基金项目（11702204）与装备预研共用技术和应用基础项目（2017ZZB·

YY4001Da）资助

详细信息

作者简介:
杜大华(1977-),博士研究生,研究方向为结构强度、振动与可靠性,cascddh@sina.com

通讯作者:
贺尔铭,教授,博士生导师,heerming@nwpu.edu.cn

计量
- 文章访问数: 1098
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- 被引次数: 0
出版历程
- 收稿日期: 2017-07-02
- 刊出日期: 2018-08-05

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

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

摘要

摘要: 针对轻质大柔度空间索网天线的结构特点及其动力学特性，提出了一种适合于该类索网结构的模态测试技术。设计了一套适用于索网结构激励的非接触气动激振系统，采用三维扫描激光测振系统（3D SLDV）进行非接触振动测量，并利用随机减量技术（RDT）及Ibrahim时域法（ITD）识别结构的模态参数。研究表明，运用本试验方法成功进行了索网结构振动模态测试，拓展了常规的模态试验手段，具有广阔的推广应用价值。
- 非接触激励 /
- 三维扫描 /
- 激光测振 /
- 柔性索网 /
- 模态测试
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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参考文献(15)

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