Please wait.'

Page is loading'


Home  > Raw materials & technologies  > Investigating the dynamic characteristics...

Monday, 16 September 2019
pdf
Raw materials & technologies

Investigating the dynamic characteristics of a rotor system with surface coatings

Monday, 5 September 2016

A Jeffcott rotor system with surface coatings capable of describing the mechanical vibration resulting from unbalance and rub-impact is formulated in a study. The findings could be interesting for the aerospace industry.

Investigating the dynamic characteristics of a rotor system with surface coatings. Source: Grey59/pixelio.de

Investigating the dynamic characteristics of a rotor system with surface coatings. Source: Grey59/pixelio.de

A contact force model proposed recently to describe the impact force between the disc and casing with coatings is employed to do the dynamic analysis for the rotor system with rubbing fault.

Surface coatings keep rotor system running stably

Due to the variation of penetration, the contact force model is correspondingly modified. Meanwhile, the Coulomb friction model is applied to simulate the friction characteristics. Then, the case study of rub-impact with surface coatings is simulated by the Runge-Kutta method, in which a linear interpolation method is adopted to predict the rubbing instant. Moreover, the dynamic characteristics of the rotor system with surface coatings are analysed in terms of bifurcation plot, waveform, whirl orbit, Poincaré map and spectrum plot. And the effects of the hardness of surface coatings on the response are investigated as well. Finally, compared with the classical models, the modified contact force model is shown to be more suitable to solve the rub-impact of aero-engine with surface coatings.

The study is published in: Mechanical Systems and Signal Processing, Volume 84, Part A, 1 February 2017, Pages 469–484

top of page
Comments (0)
Add Comment

Post comment

You are not logged in

register