 Rank: Newbie
Groups: Registered
Joined: 23/11/2011(UTC)
Posts: 1
Location: UK
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I was in the process of looking at some lifting structures and have managed to produce a very strange error. I have derived an angle which I then use in a later Sin function. If I simply give an answer the result it correct but if I define a symbol to the function and check the value of the symbol the answer is hugely incorrect. File can be found here: http://files.engineering...file=Sin_Error_-_Copy.smI have reproduced the error again at the bottom of the page with different values. Wondered whether anyone can reproduce this error or offer any insight?
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  Rank: Advanced Member Groups: Registered
Joined: 04/07/2010(UTC) Posts: 178   Was thanked: 19 time(s) in 13 post(s)
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Try this. Change Optimization to Numeric.
First Select all SMath items.
From Calculation Menu -> Optimization -> Numeric.
I'm a civil engineer and perform a lot of structural calculations using SMath. Calculations with units helps to avoid errors, kips vs. lbs, inch vs. feet, etc. I have often encountered similar strange results and 99% of the time Optimization->Numeric solves the problem. I've found its important to display the results of each calculation just to see if it makes sense. I notice you're doing the same thing. Good engineering habit.
I wish default Optimization was Numeric. Don't know what Symbolic is used for. |
Ed |
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