gravity load using concetrated mass
gravity load using concetrated mass
(OP)
hi all
I want to simulate the weight of a structure using concetrated mass at certain points of the mesh. However I am not so sure whether by applying inertial load over the entire model, by this way nastran takes under consideration the weight at those points. The procedure I used was teh following:
1)created an concetrated mass at a certain point of the structure 2) Applied an inertial load over the entire structure (with g=-1 in the y direction).
The rest of the structure is modelled with materials that have no density and shell elements (I thought that by this way the model would be computationally more efficient)
Was this the correct way?
Cheers
I want to simulate the weight of a structure using concetrated mass at certain points of the mesh. However I am not so sure whether by applying inertial load over the entire model, by this way nastran takes under consideration the weight at those points. The procedure I used was teh following:
1)created an concetrated mass at a certain point of the structure 2) Applied an inertial load over the entire structure (with g=-1 in the y direction).
The rest of the structure is modelled with materials that have no density and shell elements (I thought that by this way the model would be computationally more efficient)
Was this the correct way?
Cheers





RE: gravity load using concetrated mass
BJP
RE: gravity load using concetrated mass
true , may be I do not need gravity. But applying only a concetrated mass does this result in application of a force at a single point? I inserted the mass property for the conm2 element from the property set card. But when I view the results and the reaction forces, it seems that the solution doesn't consider the masses. Obviously I am doing something wrong!
Any help, anyone?
RE: gravity load using concetrated mass
http://www.mscsoftware.com/support/online_ex/Nastran/Nas105/appendix_C2.pdf
also, is the mass attached to the rest of the model?
BJP
RE: gravity load using concetrated mass
the answers seem to be different therefore by applying an inertial load of g=-1, the concetrated masses must be taken under consideration in the solution
RE: gravity load using concetrated mass
shlr
RE: gravity load using concetrated mass