蒙皮裂纹点阵夹芯梁振动特性分析及裂纹识别

陈建恩, 施月奇, 刘 军, 葛为民, 王肖锋

振动与冲击 ›› 2018, Vol. 37 ›› Issue (5) : 155-162.

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振动与冲击 ›› 2018, Vol. 37 ›› Issue (5) : 155-162.
论文

蒙皮裂纹点阵夹芯梁振动特性分析及裂纹识别

  • 陈建恩, 施月奇, 刘 军, 葛为民, 王肖锋
作者信息 +

Vibration characteristics analysis and crack identification for a truss core sandwich beam with skin crack

  • CHEN Jian-en, SHI Yue-qi, LIU Jun, GE Wei-min, WANG Xiao-feng
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文章历史 +

摘要

主要研究了含蒙皮呼吸裂纹金字塔型点阵夹芯梁的振动特性。基于夹芯结构折线理论,考虑呼吸效应引起的刚度周期性变化,推导出系统的动力学方程。分析裂纹深度和裂纹位置对裂纹夹芯梁固有频率的影响,运用频率响应曲线、波形图和相图研究了裂纹参数对夹芯梁强迫振动响应的影响。研究结果显示,超谐共振响应对裂纹参数的变化较为敏感,可以利用其相图的几何特征识别裂纹参数。

Abstract

Vibrations of a pyramidal truss core sandwich beam with a skin breathing crack were investigated. Based on the zig-zag theory of sandwich structures, considering stiffness’s periodic variation due to breathing effect of crack, the system’s dynamic equations were derived. The effects of crack’s depth and location on the system’s natural frequencies were analyzed, and the influences of crack parameters on forced vibration responses of the sandwich beam were investigated with frequency response curves, waveforms and phase diagrams. The results indicated that super-harmonic responses of the sandwich beam are sensitive to crack parameters; geometric features of phase diagrams can be used to identify crack parameters.



关键词

振动分析 / 点阵夹芯结构 / 呼吸裂纹 / 附加柔度

Key words

 vibration analysis / truss core sandwich structure / breathing crack / additional flexibility

引用本文

导出引用
陈建恩, 施月奇, 刘 军, 葛为民, 王肖锋. 蒙皮裂纹点阵夹芯梁振动特性分析及裂纹识别[J]. 振动与冲击, 2018, 37(5): 155-162
CHEN Jian-en, SHI Yue-qi, LIU Jun, GE Wei-min, WANG Xiao-feng. Vibration characteristics analysis and crack identification for a truss core sandwich beam with skin crack[J]. Journal of Vibration and Shock, 2018, 37(5): 155-162

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