Normal Modes, mass density or weight density?
Normal Modes, mass density or weight density?
(OP)
In a normal modes analysis, do you use PARAM WTMASS all the time or are there instances where you choose to use weight density?
Param WTMASS is generally set to 1/386.4 in english units. It converts the material densities to mass density when you use weight density in the material definition.
I was told it is always best to use mass density for normal modes.
Param WTMASS is generally set to 1/386.4 in english units. It converts the material densities to mass density when you use weight density in the material definition.
I was told it is always best to use mass density for normal modes.
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RE: Normal Modes, mass density or weight density?
f = sqrt(K/m) , where m = mass NOT weight.
RE: Normal Modes, mass density or weight density?
www.stressebook.com
Stressing Stresslessly!