MAC with Ansys for Measurement Locations. This is a simple question with pretest software like FEMtools or some other software that optimizes the MAC matrix. ShareAppsCrack is a blog to sharing software, applications, course and game. For Developer, Engineer, Designer, Student and everyone need. ANSYS comes with two different state-of-the-art computational fluid dynamics software for process and product Design Optimization. One is the ANSYS Fluent while other is the ANSYS CFX. In this section, we will be looking into the designs and features of ANSYS CFX and what makes this software great.

One of the most powerful things about ANSYS Mechanical is the fact that it creates an input file that is sent to ANSYS Mechanical APDL (MAPDL) to solve. This is awesome because you as a user have complete and full access to the huge breadth and depth available in the MAPDL program. MAPDL is a good old-fashioned command driven program that takes in text commands one line at a time and executes them. So to access all those features, you just need to enter in the commands you want.

For many older users this is not a problem because we grew up using the text commands. But new users did not get the chance to be exposed to the power of APDL (ANSYS Parametric Design Language) so getting access to those advanced capabilities can be tough.

In fact, I was in a room next to one of our support engineers while they were showing a customer how to change the elements that the solver would solve (Mechanical defaults to the most common formulation, but you can change them to whatever still makes sense) and the user had to admit he had never really used or even seen APDL commands before.

So, as a way to get ANSYS Mechanical users out there started down the road of loving APDL commands, we got together and came up with a list of 20 APDL commands that every user should know. Well, actually, it is more than 20 because we grouped some of them together. We are not going to give too much detail on their usage, the APDL help is fantastic and it explains everything. In fact, if you use a copy of PeDAL you can get the help right there live as you type (yes, that was a plug for you to go out and plop down $49 and buy PeDAL).

Also note that we are not getting in to how to script with APDL. It is a truly parametric command language in that you can replace most values in commands with parameters. It also has control logic, functions and other capabilities that you find in most scripting languages. We will focus on actual commands you use to do things in the program here. If you want to learn more about how to program with APDL, you can purchase a copy of our “Introduction to the ANSYS Parametric Design Language” book. (another plug)

Some APDL Basics

APDL was developed back in the day of punch cards. It was much easier to use than the other programs out there because the commands you entered didn’t have to be formatted in columns. Instead arguments for commands are separated by commas. Therefore, instead of defining a Node in your model as:

345 12.456 17.4567 0.0034

(note that the location of that decimal point is critical). You create a line as:

N,345,12.456,17.4567, 0.0034

Trust me, that was a big deal. But what you need to know now is that all APDL commands start with a keyword and are followed by arguments. The arguments are explained in the Command Reference in the help. So the entry for creating a node looks like this:

The documentation is very consistent and you will quickly get the hang of how to get what you need out of it. The layout is explained in the help: // Command Reference // 3. Command Dictionary

Another key thing to know about commands in MAPDL is that most entities you create (not loads and boundary conditions) have an ID number. You refer to entities by their ID number. This is a key concept that gets lost if you grew up using GUI’s. So if you want to make a coordinate system and use it, you define an ID for it and then refer to that ID. Same thing goes for element definitions (Element Types), material properties, etc… Remember this, it hangs up a lot of newer users.

To use MAPDL commands you simply enter each command on a line in a command object that you place in your model tree. We did a seminar on this very subject about two years ago that you can watch here.

The idea of entity selection is fundamental to APDL. Above we point out that all entities have an ID. You can interact with each entity by specifying its ID. But when you have a lot of them, like nodes and elements, it would be a pain. So APDL deals with this by letting you select entities of a given type and making them “selected” or “unselected” Then when you execute commands, instead of specifying an ID, you can specify “ALL” and all of the selected entities are used for that command. Sometimes we refer to entities as being selected, and sometimes we refer to them as “active.” The basic concept is that any entity in ANSYS Mechanical APDL can be one of two states: active/selected or inactive/unselected. inactive/unselected entities are not used by whatever command you might be executing.

If you want to see all of the APDL command that ANSYS Mechanical writes out, simply select the setup branch of your model tree and choose Tools->Write Input File. You can view it in a text editor, or even better, in PeDAL.

One last important note before we go through our list of commands: the old GUI for MAPDL can be used to modify or create models as well as ANSYS Mechanical. Every action you take in the old GUI is converted into a command and stored in the jobname.log file. Many users will carry out the actions they want in an interactive session, then save the commands they need from the log file.

Wait, one more thing: Right now you need these commands. But at every release more and more of the solver is exposed in ANSYS Mechanical FUI and we end up using less and less APDL scripts. So before you write a script, make sure that ANSYS Mechanical can’t already do what you want.

The Commands

1. !

An exclamation point is a comment in APDL. Any characters to the right of one are ignored by the program. Use them often and add great comments to help you and others remember what the heck you were trying to do.

2. /PREP7 – /SOLU – /POST1 – FINISH

The MAPDL program consists of a collection of 10 processors (there were more, but they have been undocumented.) Commands only work in some processors, and most only in one. If you enter in a preprocessor command when you are in the postprocessor, you will get an error.

When you create a command object in your ANSYS Mechanical model, it will be executed in either the Pre processor, the Solution processor, or in the Post processor. Depending on where in the model tree you insert the command object. If you need to go into another processor you can, you simply issue the proper command to change processors. JUST REMEMBER TO GO BACK TO THE PROCESSOR YOU STARTED IN when you are done with your commands.

/PREP7 – goes to the pre processor. Use this to change elements, create things, or modify your mesh in any way.

/SOLU – goes to the solution processor. Most of the time you will start there so you most often will use this command if you went into /PREP7 and need to get back. Modify loads, boundary conditions, and solver settings in this processor.

/POST1 – goes to the post processor. This is where you can play with your results, make your own plots, and do some very sophisticated post-processing.

FINISH – goes to the begin level. You will need to go there if you are going to play with file names.

3. TYPE – MAT – REAL – SECNUM

You only really need to know these commands if you will be making your own elements… but one of those things everyone should know because the assignment of element attributes is fundamental to the way APDL works…. so read on even if you don’t need to make your own elements.

Every element in your model is assigned properties that define the element. When you define an element, instead of specifying all of its properties for each element, you create definitions and give them numbers, then assign the number to each element. The simplest example are material properties. You define a set of material properties, give it a number, then assign that number to all the elements in your model that you want to solve with those properties.

But you do not speci

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