Continuation techniques for analysis of whole aeroengine dynamics with imperfect bifurcations and isolated solutions

• DOI: 10.1007/s11071-016-3003-y
• Publication Date: 2016-08-10T15:59:13Z
• Authors: Loïc Salles; Bernard Staples; Norbert Hoffmann; Christoph Schwing...
• Keywords: Harmonic balance; Rubbing; Rotordynamics; Continuation; Numerical continuation

The analysis of whole engine rotordynamic models is an important element in the design aerojet engines. include gyroscopic effects and allow for rubbing contact between rotor stator components such as bladed discs casing. Due to nonlinearities inherent system, bifurcations frequency response may arise. Reliable efficient methods determine bifurcation points solution branches are required. For this purpose, a multi-harmonic balance approach presented that allows numerically detection calculation both continuous isolated functions. method applied test case derived from commercial aeroengine. A structure with observed studied paper. comparison time marching based on simulations shows accuracy numerical efficiency newly developed approach.