裂纹梁非线性响应分析

留言板

尊敬的读者、作者、审稿人, 关于本刊的投稿、审稿、编辑和出版的任何问题, 您可以本页添加留言。我们将尽快给您答复。谢谢您的支持!

姓名

邮箱

手机号码

标题

留言内容

验证码

Analysis of Nonlinear Response of Cracked Beams

Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institution of China, Chengdu, 610041, China

摘要: 基于Lagrange方程建立含裂纹两端铰支空心梁在简谐激励作用下的运动方程。运动方程考虑了几何非线性以及裂纹的张开闭合状态的交替变化。采用数值算法研究含裂纹空心梁在简谐激励作用下的超谐共振、次谐共振,所得结论与已有文献的结论一致。在较大简谐激励幅值条件下,深入探讨几何非线性对含呼吸裂纹梁响应的影响,为空心梁类结构的裂纹识别提供有益参考。
- 呼吸裂纹 /
- 几何非线性 /
- 谐激励
Abstract: Based on the Lagrange’s equation, the equation of motion for pinned-pinned cracked beam with hollow section is derived. The equation of motion takes account of the geometric nonlinearity and opening and closing of the crack. Based on a numerical method, the superand sub-harmonic resonances are studied when the cracked supported pipes conveying fluid are excited by a harmonic force and the conclusions are the same as the existed researches. Then the effect of the geometric nonlinearity on response of beam with hollow section under harmonic force with large amplitude are further studied. These researches are useful for the cracks detection in the beam with hollow section.
- Breathing crack /
- Geometric nonlinearity /
- Harmonic force