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梁的破损对频率振型及振型曲率的影响
引用本文:袁向荣.梁的破损对频率振型及振型曲率的影响[J].振动.测试与诊断,1994,14(2):40-44,50.
作者姓名:袁向荣
作者单位:南京航空航天大学振动所
摘    要:本文用欧拉梁振动理论,改变简支梁中某一小段的高度以模拟破损。仿真结果表明,破损对某些阶频率、振型的影响不大,对振型曲率的影响较大.用振型曲率监测简支梁的破损优于用频率或振型的监测方法。

关 键 词:破损检测,频率,振型,振型曲率

The Damage Effect of Frequencies, Mode Shapes and Curvature Mode Shapes of Beams
Yuan Xiangrong.The Damage Effect of Frequencies, Mode Shapes and Curvature Mode Shapes of Beams[J].Journal of Vibration,Measurement & Diagnosis,1994,14(2):40-44,50.
Authors:Yuan Xiangrong
Abstract:n this paper, the depth of a little section of a beam is changed to imitate the beam damage. Damage simulation using Eulerian beam theory is introduced. It shows through theory and computor simulation that the changes of some frequencies and mode shapes caused by beam damage are not evident, the changes of curvature mode shapes are obvious. Damage detection of beams using test curvature mode shapes is valid.
Keywords:damage detection  frequency  mode shape  curvature mode shape  
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