Int J Performability Eng ›› 2020, Vol. 16 ›› Issue (7): 991-998.doi: 10.23940/ijpe.20.07.p1.991998

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Optimization of High Speed Rotor-Bearings System to Assess the Reliability using XLrotor

Murgayya S Ba,*, Suresh H Na, Madhusudhan Nb, and Saravanabavan Dc   

  1. aDepartment of Automobile Engineering, Dayananda Sagar College of Engineering, Bengaluru, 560078, India;
    bVibration Analyst, Diagnostic Engineers, Bengaluru, 560040, India;
    cSchool of Mechanical Engineering, Dayananda Sagar University, Bengaluru, 560114, India
  • Submitted on ; Revised on ; Accepted on
  • Contact: * E-mail address:

Abstract: The research work is focused on the behavior of the Nelson rotor with bearings in order to predict the dynamic forces (critical speeds, vibration levels, and load on bearings at peak amplitude) acting on it, which tends to decrease reliability. The reliability of the rotor system not only depends on static stress, but also dynamic stress which directly affects the performance. This work is mainly focused on the computation of a rotor system using the XLrotor tool. The tool effectively computes the results with the least acceptable error compared to other simulation techniques. The primary failure in the rotor assemblies is due to imbalance, which leads to misalignment, looseness, bent shafts, and bearing faults. The imbalance is an inherent property of rotors which leads to an increase in the centrifugal force of rotors. The Nelson rotor with a bearing configuration (Isotropic, Orthotropic and Fluid film Bearings) is modeled in XLrotor to analyze the rotor performance to determine Undamped Critical Speeds (UCS), Damped Critical Speeds (DCS), and Vibration Levels at Imbalance and Load acting on Bearings at peak amplitude. The rotor is optimized and suggests a reliable model using the XLrotor.

Key words: rotordynamics, reliability analysis, vibration monitoring and XLrotor