Diagnosing Malfunctions on Water-Based Machinery
Dr. Xi Wu
Mechanical Engineering
Using a cracked and asymmetric rotor with two disks representing a turbine and generator, Professor Xi Wu studies the vibrations due to imbalance and side load. Her numerical simulations demonstrate how the variations of rotor parameters affect the vibration response. Bode, spectrum, and orbit plots are used to show the differences between the vibration signatures associated with cracked shafts versus asymmetric shafts. Analyzing the plots reveal distinct vibration characteristics of both cracked and asymmetric rotors, including reverse vibration components. The mathematical model utilized in the study of the rotors predicted critical speeds and vibration orders for the commonly reported diagnostic symptoms.
This research is funded by the Department of the Navy, Office of Naval Research and Donald E. Bently Center for Engineering Innovation at California Polytechnic State University.
Contact: Dr. Xi Wu
Phone: 805-756-5114
Email: xwu@calpoly.edu