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SMath Studio - Units 3

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dik

dik

Structural
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I'm doing some sheets in SMath Studio and am having some difficulty with units in some of the code equations. They produce a numeric value, but, the units are not consistent within the equation.

I'm currently adding another 'coefficient' that 'neutralises' the units within the equation and eliminates them, and providing a correct unit at the end of the equation for all parts.

Does anyone know of a simpler manner of overriding SMath units?

Dik
 
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Rewrite the equations with a consistent set of units and convert the inputs as necessary.
 
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Thanks... I was afraid of that...

Dik
 
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For example, the formula direct from the CSA Standard (concrete code) is Ec = (3300*sqrt(f'c)+6900)*(γ.c/2300)^1.5

where f'c is MPa, gamma is kg/m^3, c is MPa, all raised to various powers... the result is MPa. I have to introduce coefficients that render the results dimensionless and then tack on a unit.

Dik
 
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Thanks Greg... would have to introduct coef that rendered the equation as dimensionless and then add one to the end.

Dik
 
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Thanks Greg... would have to introduct coef that rendered the equation as dimensionless and then add one to the end.
Click to expand...

That's what is discussed in the thread I linked. I don't have time to go through the discussion right now, but there are some alternative procedures in there.

Doug Jenkins
Interactive Design Services
 
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IDS said:
That's what is discussed in the thread I linked. I don't have time to go through the discussion right now, but there are some alternative procedures in there.
Click to expand...

Yes, went through that thread... good post... and was my original solution... I was just hoping there would be an easier method. SMath, if you run your mouse cursor over the formula, yields the units, and it would be a matter of correcting for these.

Dik
 
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IRS: Thread was good...

thanks, Dik
 
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More bulletproof way is to make f'c and γ.c dimensionless using division by MPa and kg/m^3. It will allow to use US or SI units for definitions. Please see attached.
image_y3mlvm.png
 
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Yakpol:
Thanks, long time no hear...

Dik
 
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