【摘要】 提出采用一种新的基于非线性输出频率响应函数(NOFRFs)的方法,进行转子系统碰摩故障的定位识别。NOFRFs由非线性系统的Volterra级数理论发展起来,对多自由度振动系统中的非线性环节具有定量的检测能力。对不同碰摩位置的转轴横向振动进行有限元仿真,进而计算NOFRF函数的值,用于对碰摩所处的区间位置进行判定。更多还原

【Abstract】 A novel method for locating rub-impacts along a rotor shaft is proposed based on the concept of Nonlinear Output Frequency Response Functions (NOFRFs). As one of the most common damaging malfunctions of rotating machineries, the rub - impacts in a rotor system are often modeled as a nonlinear problem and the identification of their locations is important in industrial applications. The NOFRFs were developed based on the Volterra series theory of nonlinear systems and found to be effective in detecting nonlinear components in a multi -DOF vibrating system. The simulations of shaft node transverse vibrations are carried out with finite element method for different rub-impact positions along the shaft. And then the NOFRFs are calculated and their values are used to indicate the possible range where there exist rub-impacts.更多还原