Writing shear and moment equations for a simple beam problem?

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SUMMARY

The discussion centers on generating shear and moment equations for a simple beam problem using Mathcad. A user encounters difficulties with integrals and expression formatting. A respondent highlights the importance of correctly displaying multiplication operators in Mathcad, noting that hidden operators can lead to confusion, particularly when scalar values multiply expressions in parentheses. The respondent suggests that the absence of visible multiplication operators between variables and expressions may be causing the user's issues.

PREREQUISITES
  • Familiarity with Mathcad 15 or later for engineering calculations
  • Understanding of structural engineering concepts, specifically shear and moment equations
  • Basic knowledge of integral calculus as applied to beam analysis
  • Experience with expression formatting and operator visibility in Mathcad
NEXT STEPS
  • Review Mathcad documentation on expression formatting and operator visibility
  • Study shear and moment diagram generation techniques for beams
  • Practice integral calculus applications in structural analysis
  • Explore troubleshooting techniques for common Mathcad issues
USEFUL FOR

Structural engineers, civil engineering students, and anyone using Mathcad for beam analysis and structural calculations will benefit from this discussion.

rtrux4
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Im trying to generate a simple beam program in mathcad and am having trouble with the integrals. Attached is what I have so far:
 

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rtrux4 said:
Im trying to generate a simple beam program in mathcad and am having trouble with the integrals. Attached is what I have so far:

Hi,

I note it's been some time since you posted this, but if you're still interested ...

It's difficult (to impossible!) to diagnose problems from just a picture of a worksheet because there are some display subtleties that can only be seen by clicking on the 'offending' expression. This is a potential case in point. To make the expressions look more like their typographical equivalents, Mathcad has the ability to hide the multiplication operator. However, the down side of this is that the expression can also look like a function call if, as in your case, a scalar multiplies an expression in parentheses.

What I think is going from your picture, and you can probably see this coming now, is that there isn't a multiply operator between most of your r1,r2,r3 and w and the expressions in parentheses.

NR
 

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