MickMack
Subscriber

Many thanks for that, i have highlighted the fact that ¤ëiis the natural circular frequency of mode i, where as i used the natural frequency from the modal analysis. ¤ëiis Also referred to as the angular frequency.
Do you think the inclusion of damping is making the equations/calculations more difficult to converge? Hence the analysis is failing to converge at a lower time than an undamped model.
Regards Michael