转子动力学
参数统计
还原(数学)
弗洛奎特理论
有限元法
转子(电动)
Timoshenko梁理论
模态分析
振动
方位(导航)
情态动词
直升机旋翼
激发
工程类
理论(学习稳定性)
流离失所(心理学)
结构工程
控制理论(社会学)
非线性系统
数学
计算机科学
正常模式
作者
Yvon Briend,Mzaki Dakel,Eric Chatelet,Marie-Ange Andrianoely,Régis Dufour,Sophie Baudin
出处
期刊:Journal of Vibration and Acoustics-transactions of The Asme
日期:2019-12-01
卷期号:141 (6)
被引量:6
摘要
Abstract A new reduction method is proposed to investigate the behavior stability of rotor-bearing systems subject to a multifrequency rotational motion of their base. Combining the modal analysis and the construction of specific dynamic Ritz vectors, this method is able to deal with complex rotordynamics characteristics such as nonproportional damping, nonself-adjoint matrices, or time-varying parametric coefficients. This paper focuses first on assessing the accuracy and efficiency of the reduction method by computing time history and spectral responses of full and reduced models due to multifrequency base excitations. Its main potential is then highlighted in the parametric stability analysis through Floquet theory. The proposed numerical examples are composed with academic and industrial rotors, both modeled with one-dimensional Timoshenko beam finite element and supported by hydrodynamic journal bearings.
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