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nastran nx femap - mass point
- Thread starter Nevenick
- Start date
Hi,
Use a RBE3 element; connect independent nodes (only translational DOF checked) to where you mass is attached to the surface.
Use a CONM2 mass element at the CoG location and create a property with the right mass value.
That's all.
Seif Eddine Naffoussi, Stress Engineer
33650 Martillac û France
Use a RBE3 element; connect independent nodes (only translational DOF checked) to where you mass is attached to the surface.
Use a CONM2 mass element at the CoG location and create a property with the right mass value.
That's all.
Seif Eddine Naffoussi, Stress Engineer
33650 Martillac û France
- Thread starter
- #3
Dear Sir,
Thank you for your answer.
I am new NASTRAN user and I attempt to recreate what you propose, but I don't success.
I try to making it for the two points:
-- "Use a RBE3 element; connect independent nodes (only translational DOF checked) to where you mass is attached to the surface."
Is it :
* Model > Element > TYPE = RIGID" > RBE3 (interpolation) > NODES > METHOD = BY SURFACE > UM DOF
TX,TY,TZ activate, rotations deactivate for “Dependent, Independat and in Nodes” ?
-- "Use a CONM2 mass element at the CoG location and create a property with the right mass value."
Is it :
* Geometry - Point - In surface - Ok - Cancel
* Mesh - Geometry - Point - Property (choose red symbol) - Mass (value ex : 300) and OK ?
But I don't obtain something like the pic enclosed.
Reference used:
The picture is extract from :
Other reference:
Glossary:
DOF: Degrees Of Freedom
RBE: Rigid Body Element
CONM: CONcentrated Mass Element
CoG ?
Thank you for your answer.
I am new NASTRAN user and I attempt to recreate what you propose, but I don't success.
I try to making it for the two points:
-- "Use a RBE3 element; connect independent nodes (only translational DOF checked) to where you mass is attached to the surface."
Is it :
* Model > Element > TYPE = RIGID" > RBE3 (interpolation) > NODES > METHOD = BY SURFACE > UM DOF
TX,TY,TZ activate, rotations deactivate for “Dependent, Independat and in Nodes” ?
-- "Use a CONM2 mass element at the CoG location and create a property with the right mass value."
Is it :
* Geometry - Point - In surface - Ok - Cancel
* Mesh - Geometry - Point - Property (choose red symbol) - Mass (value ex : 300) and OK ?
But I don't obtain something like the pic enclosed.
Reference used:
The picture is extract from :
Other reference:
Glossary:
DOF: Degrees Of Freedom
RBE: Rigid Body Element
CONM: CONcentrated Mass Element
CoG ?
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