Pingchao Yu
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View article: Nonlinear Modeling and Vibration Response Analysis of a Dual-Rotor System with an Inter-Shaft Graphite Seal
Nonlinear Modeling and Vibration Response Analysis of a Dual-Rotor System with an Inter-Shaft Graphite Seal Open
The inter-shaft graphite seal is a common structure in the dual-rotor system, and may generate nonlinear lateral excitation when there is large relative angular motion at the seal position. This paper represents the first attempt to study …
View article: Modal analysis strategy and nonlinear dynamic characteristics of complicated aero-engine dual-rotor system with rub-impact
Modal analysis strategy and nonlinear dynamic characteristics of complicated aero-engine dual-rotor system with rub-impact Open
This paper aims to gain insight into the nonlinear modal characteristics and the possible influence of the modes on the responses for the practical dual-rotor system with rub-impact in aero-engine. The finite solid element method combined …
View article: Application of complex nonlinear modes to determine dry whip motion in a rubbing rotor system
Application of complex nonlinear modes to determine dry whip motion in a rubbing rotor system Open
Dry whip motion is an instability of rubbing rotor system and may cause catastrophic failures of rotating machinery. Up to now, the related mechanisms of the dry whip is still not well understood. This paper aims to build the relationship …
View article: Investigation on nonlinear lateral-torsional coupled vibration of a rotor system with substantial unbalance
Investigation on nonlinear lateral-torsional coupled vibration of a rotor system with substantial unbalance Open
Substantial unbalance may be caused by fan blade off during the operation period of gas turbine engines, and related dynamic problems are very critical to the safety design of rotor system in aero-engine. This article aims to understand la…
View article: Modal characteristics analysis for a flexible rotor with non-smooth constraint due to intermittent rub-impact
Modal characteristics analysis for a flexible rotor with non-smooth constraint due to intermittent rub-impact Open
Intermittent rub-impact, during which the contact between rotor and stator is characterized by a “bouncing” or intermittent type of behavior, is one of the most common rubbing forms in rotating machinery. When the intermittent rub-impact o…