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采用有限元软件ANSYS对斗轮堆取料机行走驱动轴进行建模,采用2种不同的边界约束进行模态分析,即把轴承分别看作刚性约束与弹性约束,计算结果表明,边界条件的不同处理对驱动轴的模态分析结果影响很大,为了提高计算的精度,有必要根据实际情况确定边界条件。2种边界方法处理得到轴的临界转速均远大于轴的实际转速,行走部分不会因共振而出现“啃轨”现象。
The finite element software ANSYS was used to model the bucket wheel stacker reclaimer driving shaft. Two kinds of boundary constraints were used to analyze the modal analysis. The bearings were regarded as the rigid constraint and the elastic constraint respectively. The calculation results show that the boundary conditions Different treatments have a great influence on the modal analysis results of the drive shaft. In order to improve the calculation accuracy, it is necessary to determine the boundary conditions according to the actual situation. The critical speed of the shaft obtained by the two kinds of boundary methods is much larger than the actual speed of the shaft, and the traveling part does not appear “gnawing” phenomenon due to resonance.