Frequency-Domain Analysis Techniques Developed For SPATE Response Signals

Neil Harwood; William M. Cummings

doi:10.1117/12.952914

31 July 1989 Frequency-Domain Analysis Techniques Developed For SPATE Response Signals

Neil Harwood, William M. Cummings

Proceedings Volume 1084, Stress and Vibration: Recent Developments in Industrial Measurement and Analysis; (1989) https://doi.org/10.1117/12.952914
Event: Sira/Stress and Vibration: Recent Developments in Measurement and Analysis, 1989, London, United Kingdom

Abstract

This paper discusses digital signal analysis techniques suitable for the measurement, by thermoelastic techniques, of full-field surface stress distributions on structures subjected to loading conditions which may not be of a uniform cyclic nature. A computer-aided test system has been programmed to acquire and analyse both sinusoidal and non-periodic signals from a SPATE 8000 infra-red scanning radiometer. The use of the system to measure stress and estimate damping under modal conditions is described. Sinusoidal data analysed by a digital technique together with results from a standard SPATE system are presented. The digital technique produced a clear reduction in edge effect compared with the data from the SPATE 8000 analogue instrumentation. Signal analysis procedures are presented which are suitable for the estimation of the quasi-static and modal behaviour of structures subjected to non-periodic, variable-amplitude loading. Stress patterns pre-dicted by the finite element method are also displayed for two simple structures and compared with thermoelastic data measured using wide-band random loading.

Citation Download Citation

Neil Harwood and William M. Cummings "Frequency-Domain Analysis Techniques Developed For SPATE Response Signals", Proc. SPIE 1084, Stress and Vibration: Recent Developments in Industrial Measurement and Analysis, (31 July 1989); https://doi.org/10.1117/12.952914

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