cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
Showing results for 
Search instead for 
Did you mean: 

Prepare Matric in order

SOLVED
SPRstructur
Alexandrite

Prepare Matric in order

Dear all
I try to prepare the matrices in order automatically as pic and attachment file, help me please
thank you

Q2.PNG

1 ACCEPTED SOLUTION

Accepted Solutions

Re: Prepare Matric in order

These commands:

Fred_Kohlhepp_0-1611664641469.png

Prime 4.0 file attached

View solution in original post

3 REPLIES 3

Re: Prepare Matric in order

These commands:

Fred_Kohlhepp_0-1611664641469.png

Prime 4.0 file attached

View solution in original post

Re: Prepare Matric in order

How about this:

Werner_E_0-1611667726548.png

P6 worksheet attached

 

EDIT: OH, I just see that Fred had already posted a very similar answer, using a couple of auxiliary variables for better clearness.

BTW, Freds approach assumes that ORIGIN has its default value 0. In your sheet ORIGIN is set to 1, so you will have to make some minor changes in using his solution.

Re: Prepare Matric in order

Hi,

It is possible if you use the technique of setting the structural global matrix diagonal to a very large number relative to values in the rest of the structural global matrix values.  In other words it is so stiff you get zero or really small values.

 

If you use the above technique you can solve the problem without programming by using only matrix manipulations.

 

Here is a portal frame analysis problem in Mathcad 15. You will need to convert it.

Announcements