CFRP薄壁管空间伸展臂模态与影响参数分析及试验  

Experiments and Parametric Influence Analysis on Modal for CFRP Thin-Walled Tube Space Boom

作　　者：刘靖[1] 周伟[1] 

机构地区：[1]长安大学公路学院,陕西西安710064

出　　处：《东华大学学报（自然科学版）》2013年第5期577-582,共6页Journal of Donghua University(Natural Science)

摘　　要：通过单向拉伸测试和理论计算得到4层(45°/-45°/45°/-45°)铺设碳纤维增强复合材料(CFRP)的弹性模量,作为数值分析的材料参数.由激光测振系统测试了CFRP薄壁管空间伸展臂自振模态,得到自振频率和振型.利用ABAQUS建立了CFRP薄壁管空间伸展臂自振模态有限元模型,分别采用分层和整体材料参数分析了自振模态,得到的自振频率和振型与试验结果吻合较好,进而计算分析得到CFRP薄壁管空间伸展臂线刚度(EI/L)和刚度线密度比(EI/m)对频率的影响关系.研究结果对CFRP薄壁管空间伸展臂设计和深入研究具有重要参考价值.Elastic modulus of carbon fiber-reinforced polymer （CFRP） laminate which is four-ply （45°/ -45°/45°/-45°） lay-up is obtained from the uniaxial tensile test of strip and theoretical calculation through composite material mechanics respectively, and it can be used as material parameters in numerical simulation. Modal test is subsequently carried out for lenticular CFRP thin-walled tube space boom through laser vibrometer system, natural frequencies and modes are obtained. By using ABAQUS package, the three-dimensional finite element models are built to calculate the modal of the CFRP thin- walled space boom. Material parameters of both single-ply and composite laminate are used respectively to calculate the modal, whose natural frequencies and modes are consistent with the experiment results. Finally, the influences of linear stiffness （EI/L） and stiffness to linear mass ratio （EI/m） on natural frequency are investigated respectively. The numerical procedure and experimental results are valuable for the optimization design of space boom and the future research.

关 键 词：透镜式CFRP薄壁管 空间伸展臂 激光测振系统 模态测试 刚度线密度比 

分 类 号：V214[航空宇航科学与技术—航空宇航推进理论与工程]