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tecirlioglu1-Visitor
1-Visitor
October 21, 2018
Solved

Static Force Equilbrium

  • October 21, 2018
  • 4 replies
  • 3129 views

Hello,  I have been trying to solve this problem below using MathCAD. Yet I could not do it. Kinda stuck in here.
image.pngimage.png

Best answer by Fred_Kohlhepp

You're right!  If the positions shown are equilibrium, the the problem is different.

 

Prime Express is strangely handicapped:

  • no solve blocks
  • no symbolics

That kind of made sense, but

  • the function "mean" is "a premium feature", but
  • integration and differentiation still work.

Those of us old enough to have been raised without solve blocks (hopefully) can still remember the old ways.

 

Thanks for the good wishes.  I'll still be around, though less vocal.

4 replies

R
rgunwaldsen15-Moonstone
15-Moonstone
October 22, 2018

Seems like a homework problem with a good faith effort to solve. Easy way to solve with Mathcad is to use solve block to solve balance of forces. Check attached P5 worksheet or xps file.

F
Fred_Kohlhepp23-Emerald I
23-Emerald I
October 22, 2018

Express will not execute solve blocks; answer to two decimals by trial and error.  Prime 4

R
rgunwaldsen15-Moonstone
15-Moonstone
October 22, 2018

Hi Fred,

Interesting solution to a harder problem: the figure text clearly states that "O" is the equilibrium position.

 

I hadn't realized that Mathcad Express is so brain dead as to exclude solve blocks. My bad; I'm sure I must have read this many times in this blog.

 

Best to you in your retirement. It is a shame that PTC does not offer "HobbyDabbler" licences like other software vendors. I enjoy your contributions.

 

Roger

F
Fred_Kohlhepp23-Emerald IAnswer
23-Emerald I
October 22, 2018

You're right!  If the positions shown are equilibrium, the the problem is different.

 

Prime Express is strangely handicapped:

  • no solve blocks
  • no symbolics

That kind of made sense, but

  • the function "mean" is "a premium feature", but
  • integration and differentiation still work.

Those of us old enough to have been raised without solve blocks (hopefully) can still remember the old ways.

 

Thanks for the good wishes.  I'll still be around, though less vocal.

L
LucMeekes23-Emerald IV
23-Emerald IV
October 22, 2018

Here's a solution in Mathcad 11, you should be able to read the attached file using Mathcad 15.

LM_20181022_Equilibrium1.png

LM_20181022_Equilibrium2.png

Success!
Luc

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-MFra-21-Topaz II
21-Topaz II
October 23, 2018

The layout of the system is ambiguous. In the design and analysis of a system, clear and precise design is the most important data.

R
rgunwaldsen15-Moonstone
15-Moonstone
October 23, 2018
@-MFra- wrote:

The layout of the system is ambiguous. In the design and analysis of a system, clear and precise design is the most important data.

No offense, but this does not appear to be particularly helpful to the person with the original post.

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