|
| Abstract: |
| The transient proper orthogonal decomposition (TPOD) method is used to study dynamic behaviors of the reduced rotor-bearing models, and the fault-free model is compared with the models with looseness fault. A 22 degree of freedoms (DOFs) rotor model supported by bearings is established. Both one end and two ends pedestal looseness of the liquid-film bearings are studied by analyzing the time history and the frequency-spectrum curves. The effects of the initial displacement and velocity values to frequency components of the original systems and the dimension reduction efficiency are discussed. Moreover, the effects of variation of initial conditions on the efficiency of the TPOD method are studied. Reduced models can provide guidance significance from the perspectives of the theory and numerical simplification to discuss the characteristics of pedestal looseness fault. |
| Key words: dimension reduction TPOD method rotor-bearing Pedestal looseness high-dimensional initial values |
| DOI：10.11916/j.issn.1005-9113.16205 |
| Clc Number:V231.96 |
| Fund: |
|
| Descriptions in Chinese: |
| 基于瞬态POD方法的带有松动的简化转子模型的动力学特性分析 路宽1，2，陈予恕1 （1.哈尔滨工业大学 航天学院, 哈尔滨 150001，哈尔滨； 2.爱荷华大学 工程学院，爱荷华 52242， 美国） 创新点说明：1） 应用TPOD方法研究了简化转轴模型的动力学特性，对比了无故障模型与松动故障模型的动力学特性。 2） 建立了22自由度轴承支承的转子系统模型，研究了单端松动与两端松动转子系统模型的时间历程和幅频曲线特性。 3） 分析了位移与速度初值对原始系统频率成分的影响，并验证了TPOD方法降维的有效性。 4） 研究了初始条件对TPOD方法降维有效性的影响。 关键词：降维；瞬态POD方法；转子-轴承；基础松动；高维；初值 |
