CST04 - Radial Subsynchronous Vibration Caused by Axial Vibration

Abstract

This case study presents a presence of radial subsynchronous vibration during mechanical running tests of High Pressure Compressor following API 617 requirement. During the tests it was investigated how the lateral vibration behaved while the rotor speed, oil pressure and flow to thrust bearing, load and torque were varied. After some tests, vibration analysis and literature revised, it was concluded that the main cause of radial subsynchronous vibration observed during mechanical running test (MRT) was due to axial vibration of the rotor.