Turbomachinery blade vibration measurements with tracking LDV under rotation

I. A. Sever; A. B. Stanbridge; D. J. Ewins

doi:10.1117/12.693172

21 June 2006 Turbomachinery blade vibration measurements with tracking LDV under rotation

I. A. Sever, A. B. Stanbridge, D. J. Ewins

Proceedings Volume 6345, Seventh International Conference on Vibration Measurements by Laser Techniques: Advances and Applications; 63450L (2006) https://doi.org/10.1117/12.693172
Event: Seventh International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, 2006, Ancona, Italy

Abstract

A method of measuring vibration response on rotating components using an LDV and its application on bladed disks are presented. Understanding and controlling of vibration amplitudes of bladed disks has been a primary concern for aero-engine manufacturers for many years. The vibration amplitudes of these components are known to be significantly affected by break down of symmetry due to variations in dimensional or material properties. A bladed disk exhibiting these variations is said to be mistuned and considerable research effort is put into acquisition of prediction tools to calculate the effects of these variations. However, the validation of these tools against real measurements is often ignored because of the difficulties involved in application of appropriate excitation and measurement techniques in rotating conditions. In this paper we present successful use of non-intrusive measurement and excitation techniques towards achievement of this goal. These techniques are independent of rotational speed. The so-called self-tracking LDV measurement method used in this paper was introduced in a previous paper by the authors. Here the use of method for acquisition of high quality reference response data for validation of mistuned bladed disks and those fitted with under-platform friction dampers are given.

Citation Download Citation

I. A. Sever, A. B. Stanbridge, and D. J. Ewins "Turbomachinery blade vibration measurements with tracking LDV under rotation", Proc. SPIE 6345, Seventh International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, 63450L (21 June 2006); https://doi.org/10.1117/12.693172

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available