Hi
i believe you should add up the square of the modal masses for the first N modes direction by direction, then it should get to the total mass, if you take enough modes.
What I do is to calculate the total mass by an variable and an integration of material.rho over all domain(s) and then I use the Derived Values - Global Evaluation to give
MPF_mod1.u^2 / TotalMass*100
to have the mass participation factors in % of the total mas (per direction, separately in u,v,w)
--
Good luck
Ivar
i believe you should add up the square of the modal masses for the first N modes direction by direction, then it should get to the total mass, if you take enough modes.
What I do is to calculate the total mass by an variable and an integration of material.rho over all domain(s) and then I use the Derived Values - Global Evaluation to give
MPF_mod1.u^2 / TotalMass*100
to have the mass participation factors in % of the total mas (per direction, separately in u,v,w)
--
Good luck
Ivar