Modal test and model modification of spiral bevel gears
To accurately extract spiral bevel gears'modal parameters and construct an accurate dynamic model,a combination of experimental and simulation methods were used to conduct modal tests using the moving force hammer method to extract modal parameters;an accurate simulation model was established based on measured data and modal analysis was conducted;the elementary rotation transformation method was used to correct the simulation mode shapes,and the accurate confidence of the test and simulation modes was obtained to improve the analysis accuracy;taking the experimental modal frequency as the target,the response surface method was used to correct the material parameters of the model.After the correction,the maximum relative error of natural frequency was reduced from 0.83％to 0.353％,which improved the accuracy of the simulation model.The experimental and simulation frequency response analysis results showed that the frequency shift phenomenon and acceleration amplitude error caused by inaccurate simulation models were effectively controlled,verifying the accuracy of the dynamic model.The research method lays the foundation for further structural optimization and vibration reduction and avoidance of spiral bevel gears.
万方数据
维普
