Get Help

Turn on suggestions

Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.

Showing results for

- Community
- :
- PTC Mathcad
- :
- PTC Mathcad
- :
- Re: 2D Plot Help Required

Options

- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page

Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.

Showing results for

- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Notify Moderator

12-18-2013
04:24 AM

12-18-2013
04:24 AM

Hi all,

We have certain deferential equations as shown in the attached image:

Now we want plot of Tm With respect to Time.

is it possible to achieve this in Mathcad?

Pls Help.

Thanks,

Shashank

Solved! Go to Solution.

1 ACCEPTED SOLUTION

Accepted Solutions

- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Notify Moderator

12-19-2013
04:29 AM

12-19-2013
04:29 AM

With a second-order equation you need an initial value for the dependent variable and an initial value for the rate of change of the dependent variable. However, the 2nd order equation you have implemented is not consistent with the equations you originally listed!

Alan

5 REPLIES 5

- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Notify Moderator

12-18-2013
05:18 AM

12-18-2013
05:18 AM

Re: 2D Plot Help Required

These equations can be combined to form a linear second-order differential equation with constant coefficients. This can be solved analytically (look up the solution in a standard text-book). You can then construct Tm and plot it. You will need to specify numerical values for theta and dtheta/dt at time zero before you can plot anything though.

Alan

- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Notify Moderator

12-18-2013
05:36 AM

12-18-2013
05:36 AM

Re: 2D Plot Help Required

can you please share a mathcad sheet?

- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Notify Moderator

12-18-2013
08:43 AM

12-18-2013
08:43 AM

Re: 2D Plot Help Required

Attached is a sheet showing how to solve and plot numerically. (M15 format)

Alan

Highlighted
##

- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Notify Moderator

12-19-2013
02:32 AM

12-19-2013
02:32 AM

Re: 2D Plot Help Required

Thnaks Alan,

But when i am defining it as second order derivative, its giving error, as "Too few initial conditions"

Please suggest.....

- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Notify Moderator

12-19-2013
04:29 AM

12-19-2013
04:29 AM

With a second-order equation you need an initial value for the dependent variable and an initial value for the rate of change of the dependent variable. However, the 2nd order equation you have implemented is not consistent with the equations you originally listed!

Alan

Top Tags