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Table 1 – Element types supported by NX Nastran – Basic ... SMP-enabled iterative solver reduces linear static solution time by as much as 45 percent on 8 ...

Jun 14, 2021 · In addition, an iterative solver uses a procedure called “preconditioning”. In the simplest terms, the condition number of a matrix can be expressed as the ratio of the absolute value of biggest to smallest number in the matrix. As the condition number increases, the equation system becomes less stable.

NX Nastran User's GuideContact for Linear Solutions. Contact conditions can be included when using the element iterative solver. The element iterative solver is requested by including ITER=YES and ELEMITER=YES on the NASTRAN statement. For example, $* NASTRAN$*NASTRAN ELEMITER=YES, ITER=YES$*... Preloaded bolts, glue conditions, and contact conditions can all be used simultaneously with the element iterative solver.

The element iterative solver is supported by NX Nastran in SOL 101 analyses only. You can include contact conditions in SOL 101 analyses with the iterative solver. With the element iterative solver, the software works entirely from the element matrices.

It is therefore recommended that you turn ON the Element Iterative Solver in the "Edit. Solution" dialog. 3. Close the Information window.

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14.08.2014 · With NX NASTRAN v9.1 we have two solvers: DIRECT SPARSE solver and ITERATIVE PCG solver. The direct sparse solver is my prefered solver, is perfect to solve shell & beam models, but if you run very large problems with bulky 3-D solid CTETRA elements, the amount of storage required by a direct solution solver may be too large for the available …

The ELEMENT ITERATIVE solver (please note that with NX NASTRAN you can choose between global iterative & element iterative) performs particularly well with solid element-dominated models. It may be a faster choice if lower accuracy is acceptable.

(NX 9) When I try to simulate any model, if I not check the option of element iterative solver the simulation give me the msessage no ...

Solvers->NX NASTRAN->NX NASTRAN - Structural->Modeling Objects. Element Iterative Solver Options: Sample Journal: Descriptor Name: Element Iterative Solver Options Properties. UI Name Automation (neutral) Name Value type Range Default Value; Preconditioner Option (PRECOND) PRECOND: integer:

Solvers->NX NASTRAN->NX NASTRAN - Structural->Modeling Objects. Element Iterative Solver Options: Sample Journal: Descriptor Name: Element Iterative Solver Options

14.06.2021 · Fig. 01 Screenshot of FEM solver options available in SimScale. As shown in Fig. 01, we can see that, for structural mechanics simulations, there are several options available in the numerics section of the SimScale cloud-based platform. Of these, Multfront, MUMPS, and LDLT are direct solvers, while PETSc and GCPC are iterative solvers.

01.04.2016 · (NX 9) When I try to simulate any model, if I not check the option of element iterative solver the simulation give me the msessage no results are found , no mat

Contact between shell surfaces is supported, although the element iterative solver works best with solid elements. For the first iteration in each outer loop of the contact algorithm, the iterative solver convergence tolerance defined with the ITSEPS parameter on the ITER bulk entry is …

Element Iterative Solver Options, 110 ... NX Nastran is a general-purpose finite element program which solves a wide variety of engineering problems. This book is intended to help you choose among the different numerical methods and to tune these methods for optimal performance.

In NX Nastran, you can choose between a global iterative and an element iterative solver. In MSC Nastran, you can use a global iterative solver.

For small-size linear systems, the direct methods will be In old versions of NX NASTRAN the PCG Iterative solver (element iter) didnt' use the parallel ...

Hello!, With current version of FEMAP V11.2.2 and NX NASTRAN V10.2 I can tell you that a 2 Million DOF meshed with 3-D solid TET10 elements (ie, around 650.000 nodes) is impossible that the element ITERative solver to be in solution time 5x longer than the DIRECT SPARSE solver, then one reason could be that you are using an old version of both FEMAP and NX Nastran.

Nx Nastran is a finite element (FE) solver for stress, vibration, buckling, structural failure, heat transfer, acoustics and aeroelasticity analyses.. Manufacturers as well as engineering suppliers in aerospace, automotive, electronics, heavy machinery, medical device, and other industries have relied on NX Nastran software for their critical engineering computing needs for over 40 years.

NX Nastran Element Iterative Solver: Linear Contact. Hi everyone,. I have a 2 million dof solid TET10 model which I'm trying to perform ...

There are several restrictions for using the element iterative solver. For example, the element iterative solver does not support superelements or inertia relief. For a complete list of these restrictions, see remark 2 for the ITER entry in the NX Nastran Quick Reference Guide. For more information, see Iterative Solutions in the NX Nastran ...

Nx Nastran is a finite element (FE) solver for stress, vibration, buckling, structural failure, heat transfer, acoustics and aeroelasticity analyses. Manufacturers as well as engineering suppliers in aerospace, automotive, electronics, heavy machinery, medical device, and other industries have relied on NX Nastran software for their critical engineering computing needs for over 40 years.

In contrast to the direct solver, the iterative solver starts by assuming an approximate solution for the unknowns {u}. The solution is iterated ...

The surface-to-surface glue capability was supported by the global iterative solver in NX Nastran 4.1, but not by the element iterative solver.