Open AccessNumerical Analysis of Rotor Dynamics of Dredge Pump Shafting
Author(s) -
Liming Zhai,
Lihong Cao,
Jingwei Cao,
H. M. Lei,
Soo-Hwang Ahn,
F. N. Chen,
Yudong Luo,
Yanni Xiao,
Z. W. Wang
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/627/1/012015
Subject(s) - critical speed , stiffness , bearing (navigation) , rotor (electric) , vibration , natural frequency , engineering , structural engineering , control theory (sociology) , mechanical engineering , physics , computer science , acoustics , control (management) , artificial intelligence , astronomy
The operating condition of dredge pump is highly complicated, a technical issue is the shaft vibration problems, which has great effects on the operation safety and stability of pumps. This paper introduces a mathematical model of rotor dynamics for the dredge pump, which is used to numerically investigate critical speeds and mode shapes of the pump shaft under different bearing stiffness and damping. The effects of bearing stiffness and damping on shafting vibration characteristics are considered. The results show that the stiffness has great effect on 1 st and 3 rd order critical speed and the damping effect can be ignored. The stiffness has little effect on shafting axial and torsional natural frequency, but has great effect on lateral natural frequency. The analysis method of rotor dynamics dealt with in this paper can provide a foundation for the design of dredge pump shafting.