×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Are you an
Engineering professional?
Join Eng-Tips Forums!
• Talk With Other Members
• Be Notified Of Responses
• Keyword Search
Favorite Forums
• Automated Signatures
• Best Of All, It's Free!

*Eng-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.

# Differential equation

## Differential equation

(OP)
Hi guys!

Needa Ya help with Mathcad. I'm trying to solve differential equation and getting troubled with that. (See attachment: http://sklep.profliz.pl/trash/mth.rar at yellow highlited region).

Mathcad says that it has too few initial conditions, but when I use sign (') [Ctrl+F7] for derivative it returns an error like that: "This value must be a function but has the form:any1".

What seems to be a problem? Any suggestions? It's obvious that initial conditions are ok and are sufficient to solve this analytically.

### RE: Differential equation

You say, it is all defined, but, just looking at it, I see no definitions for Iy, M01(x) or Mo2(x).

### RE: Differential equation

(OP)
M01(x) and M02(x) are defined just above "Given".

Iy is a cross-section constant - moment of intertia, I just forgot to paste it into the uploaded file. If I define it, there is no change - Mathcad still doesn't calculate..

Any ideas?

#### 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 Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

#### 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
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a partâ€™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 Eng-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 Eng-Tips Forums:

• Talk To Other Members
• Notification Of Responses To Questions
• Favorite Forums One Click Access
• Keyword Search Of All Posts, And More...

Register now while it's still free!