摘要
木材模态特性是木材物理力学性质很重要的一个方面,尝试将有限元法引入到木材的模态分析中来,并用有限元分析软件来获取木材的振动频率。通过与FFT试验模态分析的结果比较可知:模拟结果偏低,但2种方法得出的频率较为接近,两者拟和效果较好,在软件分析中选取的支架桥面合一的材料模型是合理的,材料单元的选取和网格的划分也是可行的。
The vibration frequency of wood was obtained with the help of finite element analysis software by applying the finite element method to the modal analysis of wood. Result shows that the simulation result is not so good compared with that by FFT modal analysis, but the frequencies calculated by the two methods are close, showing a good agreement. It demonstrates that the orthotropic model selected for determining the natural frequency of wood is reasonable, and the material element selection and grid-partition are feasible.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2008年第4期24-25,共2页
Journal of Northeast Forestry University
关键词
有限元法
模态分析
木材
无损检测
Finite element method
Modal analysis
Wood
Non-destructive testing
