Vibration Characteristics of Carbon Fiber Composite Blades Under Different Excitation Forces
In order to reduce the damage caused by vibration of blades in service,high strength carbon fiber composite was used as blade matrix to study the vibration characteristics of blades.Based on vibration analysis theory,the vibration characteristics of carbon fiber composite blades were studied by ANSYS Workbench software in this paper.Firstly,Solidworks software was used to establish the blade high-fidelity model.Secondly,the natural frequencies and modes of free vibration of carbon fiber composite blades were obtained based on modal analysis,and the vibration response characteristics of blades were studied.Thirdly,different excitation forces were applied to the blade tips to obtain the vibration displacement responses of the blade tips in all directions.Finally,according to the natural frequencies of blades at different speeds,the Cambel diagram was drawn to obtain the vibration characteristics of carbon fiber composite blades.The results show that the main vibration form of the blade is bending vibration,and the frequencies corresponding to the amplitude peaks in all directions shift to the left with the increase of the excitation force.According to Campbell diagram,there are three resonance points in the working speed range of the blade.
BladeCarbon fiber compositesVibration characteristicsExcitation force
万方数据
维普
