Transient Vibration Analysis of a Multi-packet Blade System Excited by Nozzle Jet Forces

摘要: A modeling method for the modal and transient vibration analysis of a multi-packet blade system excited by nozzle jet forces is presented in this paper. Blades are idealized as cantilever beams elastic structures like disc shroud connecting blades modeled coupling stiffnesses. modified Campbell diagram proposed to identify true resonance frequencies system. Different from SAFE that employs three dimensional space, Proposed study plane find frequencies. To verify existence frequencies, periodic were performed with method.