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Note that this only works for linear 1st order elements. otherwise you will apply inconsistent nodal loads using this approach.

Would the properties from the old standard suffice? What properties are you looking for? /PB

Morten, Thank you for the information. The planned position for us is right after a mixing chamber where we mix a drying media with some inert gas, not very susceptible to condensation in this position so I think this will work well. Thank you for the recommendation. BR PB

@GregLocock, very good idea. I worked a whole summer testing glass fiber beams stiffness and trying to replicate in a Fe-model. It was until the experienced lab technician telling me to do exactly this and "subtract" the rig compliance that I could match my FE-simulations to the test results...

Thank you pierreick!

EdStainless, thanks I will look into the fuel cell variant as well. georgeverghese, for a stable process this would be sufficient, but being a pilot plant with a lot of variations a sensor is needed.

Sorry for not being more precise, I do know that I need an oxygen sensor. What I was looking for was advice on what type would be sufficient/reasonable to use in this application. So more of an recommendation if I should go with amperometric sensor or a TDL-sensor.

We are mixing air, at room temperature and N2 in a mixing chamber/tank. We want to make sure that we are getting the oxygen under a certain limit before allowing it to enter the process. Do you have any recommendations on a sensor/type of sensor that can achieve this? This gas mixture will then...

Thank you for making this available. This is brilliant.

They should indeed be the same, when I run your code I get the same output from both FSUM and NFORCE. The code below shows a typical usage of fsum and nforce, and they behave as they should: /prep7 k, k,2,1 k,3,2 l,1,2 l,2,3 et,1,189 lesize,all,,,4 lmesh,all DK,1,UY, ...

Ok, Can you share a small APDL-snippet that reproduces this behaviour?

FSUM Sums and prints, in each component direction for the total selected node set, the nodal force and moment contributions of the selected elements attached to the node set. NFORCE Sums and prints, in each component direction for each selected node, the nodal force and moment contributions of...

Blade pass frequency (BPF) or 2 x BPF of the mixer impeller maybe? How many impeller blades? /PB

kaffy, What's the objective of your calculation? To design/check the anchor bolts? I'm all for the use of FEA, but for anchor design it is often not necessary. Anchor bolt suppliers often provide excellent formulas or software to conservatively design fasteners for the most common type of...

No. Flexible: First natural frequency of the system is well below the operating speed of the fan. Rigid: First natural frequency of the system is well above the operating speed of the fan. The rigidity of a foundation is a relative quantity. It must be considered in conjunction with the...

Hard to tell what could cause this. What kind of values do you expect? It's hard for us to give any real advice without knowing loading conditions, boundary conditions and coordinate systems used. A plot of nodal forces along a line without further information is not sufficient information.

Hi! There is a nice example in the documentation. Mechanical APDL>Technology Showcase:Example Problems:>Chapter 24: Hydrostatic Fluid Analysis of an Inflating and Rolling Tire Hope this helps

What was the error you got?

Also, be very careful if this is a shell structure, like a silo or similar. You will be grossly overestimating the capacity of such structures using an eigenvalue buckling.

e is defined in section 1.3 (1.3.7) as the residual strain from cold forming measured in percent. Maybe you can find some litterature on how to calculate the strain, but I figure it might be dependent on the method used, bending, roll forming or other methods. /PB