JOURNAL BEARING DYNAMIC RESPONSE.
Abstract
The response of a rigid-bearing, simple-rotor system subjected to an impact load applied to the rotor or pedestal support is analyzed. The problem assumes the bearing-rotor system to be initially under steady-state pressure conditions before the impact load is applied. The solution is realized upon obtaining the transfer function between the applied load and the dynamic displacement of the system and converting this function to the time domain. This inverse transform can be reduced to a line integral along the imaginary axis when considering stable systems. The linearized 'ph' solution represents the model for the finite, plain journal bearing, and the linearized 'p' solution represents the model for the finite, spiral-grooved journal bearing. These solutions are used to generate the transfer function, or admittance matrix. The perturbed equations of motion are derived for shock loads applied to either the pedestal or the rotor. The shock loadings are characterized by either impulse, unit step, or finite duration pulse forcing functions. Some frequency response and transient response results showing the effect of L/D, epsilon, lambda and mass parameter, are presented and discussed for the plain journal and spiral-grooved journal bearings. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1967
- Accession Number
- AD0661823
Entities
People
- D. E. Dougherty
- S. B. Malanoski