Comparison of component damping models
In MORe you can choose from different component damping models. To help you decide which to use, the following table gives you a description, advantages and disadvantages of the the different models.
Mass (alpha) and stiffness (beta) proportional damping
Approved method. Damping with just two parameters.
Useful damping values only in a limited frequency range. High frequency modes are highly (supercritically) damped.
Constant modal damping
All modes have a constant damping ratio
Easy to use
Weakly damped high frequency modes could slow down transient solver.
Segmented modal damping
Modes below “Max. eigenfrequency” from reduction settings have constant damping. Up to 2 times max. eigenfrequency the damping linearly increases to 100%.
Easy to use. High-frequency modes not over- or underdamped
Not the full control over granular damping adjustment.
Tabular modal damping
Each mode has an individual damping ratio
Full control. Applicable for large differences between in damping of different modes, e.g., caused by different materials such as rubber and metal in the same component.
Often missing evidence for granular damping adjustment. Table needs to be adjusted manually.
Tabular modal damping with import from ANSYS
Import of damping values from damped modal analysis in ANSYS
Full control. Applicable for large differences between in damping of different modes. Different materials can be configured with different damping properties in ANSYS.
Activate and adjust configure modal analyses in ANSYS. Damping values often unknown.