耦合板结构振动波传递及能量分布可视化研究

摘要

利用振动声强及能量可视化技术研究板结构中振动波传递及分布特性.首先介绍了结构振动声强分量的计算和流线可视化的相关理论以及振动能量流的计算公式;基于MATLAB与APDL语言编写了集成可视化计算程序,并介绍了程序实现流程.在数值计算中,先验证了可视化程序的有效性;以L形耦合板为例,实现振动波能量传递和分布的可视化,证明了计算程序的实用性和创新性;同时初步讨论了不同激励频率对能量传递及分布的影响,得到了一些有益的结论.振动波传递和分布可视化技术为进行合理优化的振动噪声控制提供了科学的依据.%The visualization of vibration wave flow in plate structures is analyzed based on the structural vibration intensity method. Firstly, the formulations for vibration intensity calculations and streamline representation, and formulations for energy are presented. After validation of the visualization method, numerical results of L-shape plate models with harmonic point force excitation are calculated by finite element approach to predict the vibration intensity’s components.Then,the streamline map and energy distribution visualization carried out by MATLAB are used to indicate the location of vibration energy and the sinking position where the energy is dissipated. Furthermore, the change of frequency on the changes of wave flow patterns and energy concentration characteristics are discussed. Visualizing energy flow provides a more accurate scientific basis to the analysis of structural vibration wave transmission in a complex structure for the further implementation of active/passive vibration control.