空间薄壁CFRP豆荚杆模态试验及分析

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摘要空间薄壁CFRP豆荚杆工作时处于悬臂状态，为掌握其结构动态响应，对10m长的超长薄壳豆荚杆在下端刚接约束下进行模态试验，得到了其模态和频率。利用有限元软件ADINA对试验模型在不考虑和考虑空气的情况下进行数值模拟分析，得到其在下端刚接约束下的模态和频率。数值模拟与试验结果对比分析表明：对于本文的试验研究对象，沿弱轴方向的基频，不考虑和考虑空气的计算结果和试验的误差分别为38.40%和4.7%，因此在地面试验和数值分析的过程中需要考虑空气与结构耦合的影响。进一步对豆荚杆的杆长进行参数化分析，得到了3m-10m豆荚杆的基频在不考虑空气和考虑空气影响下的偏差。本文对悬臂薄壁CFRP豆荚杆的设计、应用具有重要参考价值。

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	康雄建1
	陈务军1
	邱振宇1
	余征跃2
	谢超3
	曹争利3

关键词 ：空间薄壁CFRP豆荚杆, 模态试验, 流固耦合, 数值模拟

Abstract：The thin-walledlenticular CFRP (Carbon Fiber Reinforced Plastic)space as cantilever. The two symmetry axils of cross section are taken as neutral axils respectively.Modal Testing is performed in order to obtain the natural frequency of the boom, which plays an important role in dynamic analysis. FEM model of the CFRP boom is built by ADINA, and the conditions without air and with air surrounded around are taken into consideration respectively. Thenumerical simulation results, compared with the Modal Testing results, indicate that it is necessary to concern the influence of air when the test object is a thin-walledlenticular CFRP boom which has a length of 10 meters. Parametric analysis is done to evaluate the deviation of the natural frequency under the condition of air surrounded and no-air surrounded, such as the length of the boom.The presented work is valuable to the optimization design of thin-walled lenticular CFRP boom.

Key words： Thin-walled lenticular CFRP boom Modal Testing Fluid-structure interaction FEM

收稿日期: 2016-01-29 出版日期: 2017-07-28

引用本文:

康雄建1，陈务军1，邱振宇1，余征跃2，谢超3，曹争利3. 空间薄壁CFRP豆荚杆模态试验及分析[J]. 振动与冲击, 2017, 36(15): 215-221.
KANG Xiong-jian1, CHEN Wu-jun1, QIU Zhen-yu1, YU Zheng-yue2, XIE Chao3, CAO Zheng-li3. Modal Experiment and Analysis of the Thin-walled Lenticular CFRP Space Boom. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(15): 215-221.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2017/V36/I15/215

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