arptec123
Mechanical
- May 27, 2013
- 1
I am doing structural analysis of tower in FEMAP with NX Nastran. In that i need to know, Is that possible to make shear and moment connection in FEMAP... If its possible Pls help me to do how it is...
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Shear and moment connection in FEMAP
- Thread starter arptec123
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BlasMolero
Mechanical
Hello!,
Yes, with FEMAP & NX NASTRAN you can "connect" different elements types using Rigid Elements, the most common way is using RBE2 elements.
The RBE2 (Rigid Body Element, type 2) element defines a rigid body whose independent degrees of freedom are specified at a single point and whose dependent degrees of freedom are specified at an arbitrary number of points. The RBE2 element uses constraint equations to couple the motion of the dependent degrees of freedom to the motion of the independent degrees of freedom. Consequently, RBE2 elements do not contribute directly to the stiffness matrix of the structure and ill-conditioning is avoided.
The RBE2 provides a very convenient tool for rigidly connecting the same components of several grid points together.
But if you need to apply remote loads to the structure or attach mass elements to your model, then your element is the RBE3.
The RBE3 element is a powerful tool for distributing applied loads and mass in a model. Unlike the RBE2 elements, the RBE3 doesn’t add additional stiffness to your structure. Forces and moments applied to reference points are distributed to a set of independent degrees of freedom based on the RBE3 geometry and local weight factors.
Hope it helps!.
Best regards,
Blas.
~~~~~~~~~~~~~~~~~~~~~~
Blas Molero Hidalgo
Ingeniero Industrial
Director
IBERISA
48011 BILBAO (SPAIN)
WEB: Blog de FEMAP & NX Nastran:
Yes, with FEMAP & NX NASTRAN you can "connect" different elements types using Rigid Elements, the most common way is using RBE2 elements.
The RBE2 (Rigid Body Element, type 2) element defines a rigid body whose independent degrees of freedom are specified at a single point and whose dependent degrees of freedom are specified at an arbitrary number of points. The RBE2 element uses constraint equations to couple the motion of the dependent degrees of freedom to the motion of the independent degrees of freedom. Consequently, RBE2 elements do not contribute directly to the stiffness matrix of the structure and ill-conditioning is avoided.
The RBE2 provides a very convenient tool for rigidly connecting the same components of several grid points together.
But if you need to apply remote loads to the structure or attach mass elements to your model, then your element is the RBE3.
The RBE3 element is a powerful tool for distributing applied loads and mass in a model. Unlike the RBE2 elements, the RBE3 doesn’t add additional stiffness to your structure. Forces and moments applied to reference points are distributed to a set of independent degrees of freedom based on the RBE3 geometry and local weight factors.
Hope it helps!.
Best regards,
Blas.
~~~~~~~~~~~~~~~~~~~~~~
Blas Molero Hidalgo
Ingeniero Industrial
Director
IBERISA
48011 BILBAO (SPAIN)
WEB: Blog de FEMAP & NX Nastran:
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