摘要
推导了管道中导波传播的有限元方程,使用ANSYS有限元软件建立了管道模型;对导波进行模态分析,得到了管道模型的一系列特征频率与振型,通过对管道振型的模态识别,提取了管道中各模态导波的模态特征,计算得到了管道中导波的频散曲线,该曲线与解析法所得到的频散曲线相吻合。该方法可以应用于周期性重复组合的任何结构(如横截面固定的杆、板、管)中导波的频散曲线计算。
The finite element formulation of guided wave propagation in the pipe is studied. A pipe model is established with software ANSYS, and a series of eigenfrequencies and modal shapes are obtained from the modal analysis. The discrimination of the modal shapes of the pipe model results in extracting the characteristics of different mode guided waves, and obtaining the dispersion curves through calculation. The curves match very well with those obtained from the analytical solution. This method is of practical value because it can be applied to any structures of periodic repeated combination （such as rods, plates and pipes with constant cross-section）.
出处
《海军工程大学学报》
CAS
北大核心
2014年第6期64-68,共5页
Journal of Naval University of Engineering
基金
中国博士后科学基金资助项目(20110491881)
关键词
导波
模态振型
频散曲线
模态分析
guided wave
mode shape
dispersion curves
modal analysis
