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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.





Rayleigh damping

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.