2021-10-06T23:26:41Z

Simcenter 3D

---------------

How does "MODAL_DAMPING" calculated in .rmd file during flexible body motion

analysis.

MODEL_DAMPING = CRITICAL_DAMPING * (VISCOUS_DAMPING_RATIO + 0.5 *

HYSTERETIC_DAMPING_RATIO)

CRITICAL_DAMPING=2 * SQRT(MASS * STIFFNESS) = 2 * MASS * FRQUENCY

The frequency in the formula is the angular frequency, it is 2*PI times of

the frequency which is displayed in the UI.

**Notes**

Acoustics
Additive Manufacturing
Assembly FEM
Correlation and Updating
Durability
Electromagnetics (High Frequency)
Electromagnetics (Low Frequency)
Flexible Pipe
Laminate Composites
Margin of Safety
Motion
Multiphysics
NX Open
Nonlinear
Optimization
Pre/Post
Response Dynamics
Rotor Dynamics
Samcef Environment
Simulation Process Management
Thermal / Flow