复合材料层合板的振动模态试验研究

采用逐点激励单点测试（SISO）的方法,在自由状态和一端固支状态下对无损伤和含开孔损伤的复合材料层合板进行了模态试验和模态识别.根据测量得到的试验件的频率、阻尼和振型等模态参数,分析了层合板在不同边界条件下开孔损伤位置和开孔损伤大小对层合板的振动特性的影响.结果表明：复合材料层合板具有优越的阻尼特性;试验获得的振动特性与相关文献中的结果一致;开孔损伤位置和开孔损伤大小对层合板的振动特性有明显影响.

Research of Vibration Modal Experiment for Composite Laminates

The modal experiment and modal identification of composite laminates with no damage and a hole damage were performed in the free state and the end fixed supported state by the method of point by point to excite and one point to test (SISO). The influence of opening damage location and damage size on the vibration performance of composite laminates was analyzed in different boundary conditions based on the modal parameters i.e. frequency, damping and modal shape. The experimental results show that composite laminates has superior damping characteristics, and its vibration characteristics are also consistent with the results in the literature