单闭室复合材料薄壁梁的结构阻尼

任勇生;杜向红;孙双双;腾祥萌

振动与冲击 ›› 2012, Vol. 31 ›› Issue (3) : 141-146.

PDF(1316 KB)
PDF(1316 KB)
振动与冲击 ›› 2012, Vol. 31 ›› Issue (3) : 141-146.
论文

单闭室复合材料薄壁梁的结构阻尼

  • 任勇生1,杜向红1,孙双双2,腾祥萌1
作者信息 +

Structure damping of thin-walled composite one-cell beams

  • Ren Yong-sheng1; Du Xiang-hong1; Sun Shuang-shuang2; Teng Xiang-meng1
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摘要

研究单闭室复合材料薄壁梁的结构阻尼特性。基于变分渐进法(VAM) 和Hamilton原理,分别建立薄壁梁的截面力位移关系和运动方程;采用Galerkin法对薄壁梁进行自由振动分析;在获得薄壁梁振动模态矢量的基础上,根据最大应变能理论,对薄壁梁的模态阻尼性能进行预测,并且将阻尼预测的结果与现有的有限元计算结果进行对比,验证了本文阻尼分析模型的有效性。进一步针对周向均匀刚度配置(CUS)和周向反对称刚度配置(CAS)两种构型复合材料薄壁箱形梁以及一个翼型截面梁,进行阻尼计算,揭示了纤维铺层角和截面宽高比等参数的影响

Abstract

This paper presents a theoretical study of the damping of thin-walled composite one-cell beams.The equations of motion of the beams are derived using Hamilton’s principle. A variational asymptotically approach(VAM) is employed in the cross-sectional analysis. The Galerkin’s method is used in order to solve the coupled differential equations. Analytical formulas of the modal damping of the beam are derived on the basis of maximum strain energy theory. Comparison of the theoretical solutions has been made with the results obtained from the finite element method. Numerical results are obtained for two box beams: Circumferentially Uniform Stiffness(CUS) and Circumferentially Antisymmetric Stiffness (CAS), and one airfoil profile beam, respectively. The effects of fiber orientations, box section aspect ratio and length aspect ratio on modal damping are investigated.

关键词

结构阻尼 / 复合材料薄壁梁 / 颤振抑制

Key words

structural damping / thin-walled composite beams / flutter suppression

引用本文

导出引用
任勇生;杜向红;孙双双;腾祥萌. 单闭室复合材料薄壁梁的结构阻尼[J]. 振动与冲击, 2012, 31(3): 141-146
Ren Yong-sheng; Du Xiang-hong; Sun Shuang-shuang; Teng Xiang-meng. Structure damping of thin-walled composite one-cell beams[J]. Journal of Vibration and Shock, 2012, 31(3): 141-146

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