Modal Damping

The ModalDamping class implements modal damping, which applies specific damping factors directly to individual vibration modes.

Parameters

• numberofModes: Number of modes to consider for modal damping (integer greater than 0)

• dampingFactors: Comma-separated list of damping factors for each mode (values between 0 and 1)

Usage

from femora.components.Damping import DampingManager

damping_manager = DampingManager()
modal_damping = damping_manager.create_damping(
    'modal',
    numberofModes=3,
    dampingFactors="0.02,0.03,0.04"
)

Notes

• The length of dampingFactors must match the numberofModes parameter

• Each damping factor must be between 0 and 1

• Modal damping allows more precise control of damping characteristics compared to Rayleigh damping

References

• OpenSees Modal Damping

• Be Careful with Modal Damping

• Modal and Stiffness Proportional Damping