Learning Forum

[Basit Khan]

Actually I am  working on a project involving the dynamic analysis of wave springs( 2 different design). I will obtain the damping ratio from experimental measurements using methods like the logarithmic decrement and half bandwidth method.

But I am planning to perform both modal and random vibration analyses in ANSYS to further understand the damping and stiffness characteristics of the wave springs. I have a few questions regarding the relationship between the experimental damping ratio and the results obtained from numerical analyses:

1. How can I relate the damping ratio obtained from experimental measurements to the damping characteristics inferred from modal and random vibration analyses in ANSYS( Which Damping characteristics i would get from thes two analsys - MODAL & RV?

2. Are there specific parameters or results from modal and random vibration analyses, such as natural frequencies, mode shapes, PSD plots, and RMS values, that can directly correlate with the experimental damping ratio?

3. How can I validate the accuracy and reliability of my numerical simulations using the experimental damping ratio as a reference.

I would appreciate any guidance, insights, or suggestions on how to approach this comparative analysis and validation between experimental and numerical damping characteristics in ANSYS.

Thank you in advance for your help.
-Basit