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定轴旋转弹性梁的固有频率计算(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2001年05期
Page:
45-48
Column:
研究论文
publishdate:
1900-01-01

Article Info:/Info

Title:
The Precise Computation for Natural Frequency of the Elastic Beam Rotating Around a Fixed Axis
Article ID:
1000-2006(2001)05-0045-04
Author(s):
CHEN Ning
College of Mechanical Engineering Nanjing Forestry University ,Nanjing 210037,China
Keywords:
Rotating elastic beamMotion stiffingState equation Precise computation
Classification number :
TH113.22
DOI:
10.3969/j.jssn.1000-2006.2001.05.012
Document Code:
A
Abstract:
In the paper,the dynamics equation of the elastic beam rotating around a fixed axis is transferred to the state equation,based on the p recise computation of exponential matrix and direct integral of primitive functi on,a new computational scheme is presented to calculate the natural frequencies of the beam.The method has a higher precision than other methods previously adop ted and also can be applied to computing non-uniform beam with effecting of axi s force.In the given example,the first and second order natural frequencies with their stiffing coefficients are computed for rotating elastic beams which diffe rent mass on its free end.The result is shown that heavy mass has less effect on the first natural frequency than the light mass,but it is reverse on the second .

References

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Last Update: 1900-01-01