×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Engine-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Engine-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Mathcad Prime - Simply Supported Beam Problem

Mathcad Prime - Simply Supported Beam Problem

Mathcad Prime - Simply Supported Beam Problem

(OP)
Hello everyone:

I'm trying to make a mathcad prime 3.0 spreadsheet that does a standard simply supported beam calculation for me.

Some info on the file to save you time on figuring it out yourself:

Basically, what I'm trying to do is have the user input the loads on the simply supported beam into the matrices. There is a matrix for uniform loads, a matrix for point loads, a matrix for partial uniform loads (i.e. a uniform load that doesn't cover the entire beam), and a matrix for a trapezoidal load (i.e. a partial uniform load that is either increasing or decreasing in magnitude as it goes across the beam from point to point). There is also an L value that represents the total length of the beam which is also input by the user. The user basically puts in the loads into its proper matrix and also the x value where the loads are acting on the beam into the adjacent matrices and then the program is supposed to do the beam calculation for you. Note that the LC matrices are for load combinations but I haven't programmed that functionality yet so they are all set to "D" which causes everything to calculate.

Then I made a V function that takes an input of x and calculates the total shear on that point based on all the loads input by the user into the matrices above. It is basically some for loops that loop through each of the matrices, one at a time, and adds up the total shear at that point based on the inputs and then outputs the total shear. Below that, there is an x value that is one of those range of values, i.e. it starts out at 0, goes in 0.01ft increments, up to the total beam length input by the user above. Then I'm trying to graph the total V at each x (i.e. , the beam shear diagram).

Everything for the most part seems to be working as expected. The only problem I have so far is the trapezoidal loads aren't working! It doesn't seem to be doing anything and I can't figure out why to save my life. The shear chart from 7ft to 8ft is supposed to go down at that point due to the trapezoidal loads but it is straight across. Can someone take a look at this for me and see if you can see what the problem is? Hoping another set of eyes can see whatever I'm apparently missing.

Thanks in advance!

RE: Mathcad Prime - Simply Supported Beam Problem

Mathcad prime V 3 is pretty old and buggy
use the latest Version or change to SMath Studio which is far better

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Engine-Tips Forums free from inappropriate posts.
The Engine-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Engine-Tips forums is a member-only feature.

Click Here to join Engine-Tips and talk with other members! Already a Member? Login


Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Engine-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Engine-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close