NX6 DOF Sets 1

[Wreck11]

Is there any way to create a DOF Set in NX6 to be used with Modal Reduction during a modal analysis? I want to create the equivalent of an ASET in NASTRAN, is this possible?

Thanks,
Gt

 

[BlasMolero]

Dear GT,
Yes, NX Response Simulation module [NX30521] uses modal approaches to perform transient, frequency, random, and response spectrum analyses. Before performing a Response Simulation, you solve the response dynamics solution to reduce your physical model to a modal model.

Depending on the type of excitation (loading) and data recovery method you use, this solution generates the following types of mode shapes for the structure using modal reduction:

• Normal modes representing the deformed shapes (eigenvectors) of the structure at specific natural frequencies (eigenvalues). The dynamic equations of motion can be written in terms of physical DOF (for example, nodal DOF for a finite element model).

• Attachment modes representing the static deformation shape due to a unit static load applied at the location where an excitation force will be applied. Attachment modes are necessary for using the Mode Acceleration data recovery method.

• Constraint modes representing the static deformation due to a unit static displacement of a boundary degree of freedom (DOF). Constraint modes are necessary for using the Enforced Motion excitation type.

• Distributed attachment modes representing the structural behavior due to a dynamic load. They are required for calculating mode acceleration responses to distributed dynamic excitations

The combination of the mode shapes, damping, and other modal information comprises the modal model.

You can apply excitation functions to the FE (physical) model to represent applied forces, enforced motions, or distributed loads.

The NX Functions and Graphing tools allow you to create, investigate, and manage excitation and response functions. In addition, a customizable function builder utility is provided that you can integrate with your signal processing application.

NX Response Simulation (heritated from I-Deas RS) is an Advanced Simulation solution process for use with NX Nastran. It allows you to evaluate the dynamic responses of a structural model subjected to various loading conditions. The software calculates these responses using modal approaches.

Product Prerequisites:
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(NX12500 or (NX12510 and (NXN110 or NXN110G or NXN001 or NXN021))) or NX13500 or NX13510


Best regards,
Blas.