How to properly set the G parameter in GRAV bulk data entry?
Hi,
I have been confused by the parameter G in GRAV bulk data entry. I think this parameter is the acceleration of gravity. If I use the unit system of “kg, N, mm, MPa”, Should the parameter G be set to 9810 ？ I found that If I set G to 9810, the displacement of the structure in the case of gravity is too large.
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Thank you.
Hi,
“kg, N, mm, MPa” is not a set of consistent units, but “tonne, N, mm, MPa” is. Convert the material density from kg to tonne (it should be 1.54e-009).
http://altairuniversity.com/wp-content/uploads/2012/04/Student_Guide_55-57.pdf