How to properly set the G parameter in GRAV bulk data entry?

mansin

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.

Unable to find an attachment - read this blog

Simon Križnik

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



mansin

Thank you.