Damping ratio for the Modal Bodies in Motion

Gabriel Messager
Gabriel Messager Member, Employee Posts: 54
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edited June 2023 in Structures

How to define a damping ratio for the Modal Bodies (instead of the Stiffness Proportional Ratio)?

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  • Gabriel Messager
    Gabriel Messager Member, Employee Posts: 54
    10 Comments 5 Likes Name Dropper First Anniversary
    ✭✭✭✭
    image.png
    image.png 


    ksi = 0.01  # damping ratio
motionObjects = ExtAPI.DataModel.GetUserObjects("ANSYSMotion")
for mybp in motionObjects:
    if mybp.Name == "BodyProperties":
        modes =  mybp.AllProperties[13]
        frequency = modes.Value['Definition/Modes/Frequency']
        stiff_prop_ratio = modes.Value['Definition/Modes/StiffnessProportionalRatio']
        for i in range(6,len(stiff_prop_ratio)):
            stiff_prop_ratio[i] = 2*ksi /(frequency[i]*2*pi)
        modes.ValidState = ValidStateEnum.StateValid
ExtAPI.DataModel.Tree.Refresh()
    image.png


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