Thanks guys its been useful. The application was a high pressure turbine disc. I wasnt expecting a significant load bias but its something to think about.
I havent been able to isolate a mode and a high component of direct forceing due to gas loads might possibly explain the load bias.
TTFN
Does anyone have experience of the symmetry (or lack thereoff) for time history plots of the pk-pk total mV from a strain gauges?
Does a non symrmetrical, e.g strong positive bias in the total mV pk-pk time history plot, indicate a possible poor gauge reading? I do not mean a dc offset where...