Nils Wagner

14 Questions 112 Answers 0 Followers

Questions related from Nils Wagner

What manufacturing restrictions still exist today for laminates?

Many publications use discrete angles and layer thickness for laminates. Is that outdated?

01 January 2019 700 3 View

Where can I find a direct comparison of PML and ABCs like Enquist Majda applied to acoustic benchmarks problems based on finite element models?

Many applications in numerical acoustics occur in exterior domains. The advantage of benchmark problems is a closed form solution (e.g. circumferentially harmonic radiation from an infinite...

09 September 2018 9,416 4 View

What can be defined with the Ansys command RLBLOCK ?

RLBLOCK, 11, 11, 6, 7 (2i8,6g16.9) (7g16.9) 1 6 0.100000000E-02 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 2 6...

03 March 2018 10,558 1 View

History of inertia relief analysis ?

I am looking for the first publication on inertia relief analysis.

10 October 2017 4,627 0 View

Is there anyone who can share a 3D CAD model of a rod fastening rotor ?

I am looking for a three-dimensional CAD model of a rod fastening rotor. Iges or step format would be appreciated.

10 October 2016 2,590 3 View

What is the major reason to use beam elements instead of shell elements for the stiffeners in stiffened panels?

Finite element models of stiffened panels currently consists of shell elements for the panel and beam elements for the stiffeners. For what reason ?

04 April 2016 9,403 13 View

Who can share a finite element model of a composite shell structure ?

I am looking for an Abaqus input file (*.inp) that contains the following keywords *Shell Section, Composite *Static or *Frequency

12 December 2015 8,671 0 View

Can anyone shed some light on the definion of CPYRA elements in NX-NASTRAN ?

It is not clear to me how CPYRA elements with a varying number of midnodes are handled.

03 March 2015 6,107 3 View

Can anyone share a NASTRAN op2 file that contains an OUGV2 displacement output table in SORT2 ?

A NASTRAN OUGV2 displacement table is needed in SORT2 format.

03 March 2015 9,525 3 View

Can anyone provide coordinate measurement machine data of a blisk?

I am interested in the format of CMM data.

01 January 2015 2,021 2 View

How can I find a symmetric positive definite matrix by a rank one modification of an indefinite matrix ?

Let A be a real symmetric indefinite matrix. A is perturbed by a rank-one modification, i.e. B = A + \alpha \diag{c_i}. How can I compute the scalar \alpha such that B is real symmetric positive...

09 September 2014 8,416 0 View

What is the best way to compute the number of nodal diameters of a "tuned" blisk from a free vibration analysis?

Mode shapes are available from FEA. The procedure should be robust and fully automated.

07 July 2014 2,888 1 View

How can I calculate the density given the Young's modulus for metals?

I found some property charts, e.g. http://www-materials.eng.cam.ac.uk/mpsite/interactive_charts/stiffness-density/NS6Chart.html However, I would prefer some functional relationships for certain...

04 April 2014 3,602 11 View

Is it possible to switch between binary and ASCII output with the *.cdb file?

To export a model from the ANSYS program to another application CDWRITE is used. Is it possible to switch between binary and ASCII output with the *.cdb file?

03 March 2014 10,090 1 View