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Cantilever Plate Analysis (Introductory Batch)

Introduction | Session 1 | Session 2 | Session 3 | Session 4 | Session 5

Please note that these practical sessions are designed to be completed in sequential order. This tutorial should take approximately 1.5 hours.


Practical Sessions

The following tutorial involves five sessions, each with many straightforward steps. Below is a summary of the sessions:

1. Initiate an EASAP - 15min
Create a new EASAP and add GUI objects in the EASAP Builder that accept User input

2. Add a diagram - 10 min
Create a dynamic DIAGRAM with dimensions specified from input objects

3. Connect an EASAP to a batch software process - 20min
Configure a batch PROCESS to run the analysis

4. Produce output - 15 min
Create an HTML OUTPUT report with formatted User results

5. Test and publish an EASAP - 10 min
Test the EASAP and then publish it to a group of Users

An Author uses the EASAP Builder to create an EASA application without writing any code.

The EASAP Builder interface consists of a Tree of EASAP objects on the left and their parameters on the right.

In this tutorial we will build a fully functioning application by applying iterations of EASA's simple design process,

  1. Create an EASA object with a right-mouse-click
  2. Populate that object's parameters in one of two ways:
    • Type in literal text
    • Select a value from a drop-down list

There will be no coding involved.

For the rest of this tutorial we recommend the EASA Help Pages be opened in a browser alongside the EASAP Builder; resize both windows so each occupies either the left hand or right hand side of the screen. This will enable accuracy in completing each tutorial step.


Scenario

Let’s assume an organization uses analysis tools, which may include in-house codes and/or models created using commercial applications such as Excel® or MATLAB®. Let’s also assume there is a requirement to deploy some of these tools, in an easy-to-use form, to end-users who may not be expert at using these tools in their “native” form.

This tutorial is a guide through the creation of a custom web application called an EASAP to simplify and automate the use of an analysis tool. We create an intuitive interface to enable error-free usage with a minimal learning curve for end-users. In addition, we would like end-users to be able to store results in a central repository and to share results with colleagues.


Tutorial Summary

Any batch mode software, either in-house or commercial, can be driven by an EASAP. Here we use a batch mode program that performs a simple structural analysis of a rectangular plate. This application was written by Herbert Whitman (herbgw2@yahoo.com) and was freely available at https://www.fseas.info/

This application is an example of a simple DOS program that does not have a graphical user interface—it is ‘command-line driven code’. To run this program as intended in its original form, open a DOS command prompt, change to the directory containing the program, and type in the name of the main executable ' femrctpl.exe ' The user is prompted for a series of inputs, as shown in the figures below.

As can be seen in the above popup window, the program prompts for the name of an input data file that must be created with a text editor prior to running the program. An example of the expected form for this input data file is shown in the figure below.

The program produces lines of text and tabular data output. A portion is shown in the figure below.

The results computed by the program include:

  • Local displacements
  • Local bending moments
  • Reactions on the supported edges.

Clearly, this is not a process that you would expect a new user to be able to execute in its current form without some training. More generally—while many commercial applications offer capable GUIs—they are usually designed to allow expert users to solve many different types of problems, rather than enabling a non-expert to quickly and intuitively execute a specific process.

In this tutorial, we will take a difficult, “expert-only” process, and “wrap” the process into an intuitive web application, enabling error-free usage by non- experts.

This tutorial is designed for use with an EASA Server that is running Windows. For an EASA Server running Linux please contact our support personnel at support@easasoftware.com to receive a Linux-compatible version of the tutorial.


Tutorial Files

For this tutorial, both the planning of the EASAP and the generation of batch files for the underlying software application have been completed previously. Additionally the report template has been already created to focus on learning to Author an EASAP.

Download an archive with files we will need to complete the tutorial: https://help.myeasa.com/resource/Introductory_Batch_Tutorial_Files.zip

We will upload these files to the EASA Server in the next session.

Below are brief summaries,

File Name Description
femrctpl.exe Main executable of rectangular plate analysis program
input.txt File containing inputs for rectangular plate analysis program
plate.txt Data file for rectangular plate analysis program
EASAlogo.jpg Image file of EASA logo
plate.gif Image file for a selection image in the EASAP Library
report.html Template HTML file for report of results
PLATE.OUT Template file for extracting output

Let's continue to Session 1


Introduction | Session 1 | Session 2 | Session 3 | Session 4 | Session 5