Incorrect Unit calculation - Incorrect Unit calculation - Сообщения
#1 Опубликовано: 31.01.2015 23:11:42
Hi all,
some problem which unit calculation
K:8.87
α:1
β:0.43
γ:0
b:200*'мм
Kα:K*(α+(β*{α^2}/{b^2})+(γ*{α^4}/{b^4}))^0.5=#
result: Unit does not match((((
some problem which unit calculation
K:8.87
α:1
β:0.43
γ:0
b:200*'мм
Kα:K*(α+(β*{α^2}/{b^2})+(γ*{α^4}/{b^4}))^0.5=#
result: Unit does not match((((
#2 Опубликовано: 01.02.2015 09:39:04
The error seems correct. Just make a dimensional analysis on α+(β*{α^2}/{b^2})+(γ*{α^4}/{b^4})
You sum something dimensionless with 1/мм^2 and 1/мм^4
You sum something dimensionless with 1/мм^2 and 1/мм^4
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#3 Опубликовано: 02.02.2015 19:45:39
The error seems correct. Just make a dimensional analysis on α+(β*{α^2}/{b^2})+(γ*{α^4}/{b^4})
You sum something dimensionless with 1/мм^2 and 1/мм^4
I`m not convert unit of measure, math operation only value. mm^4 you real?? what a dimension, square? cube or astral?
#4 Опубликовано: 02.02.2015 20:11:26
Maybe the attached picture helps a little bit more to understand the issue...
As stated previously, you can't sum apples and oranges; therefore the error message seems consistent...
![2015-02-02 23_58_30-SMath Studio Desktop - [Page1_].png](/ru-RU/file/NK2ohY/2015-02-02-23_58_30-SMath-Studio-Desktop---_Page1___png)
As stated previously, you can't sum apples and oranges; therefore the error message seems consistent...
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#5 Опубликовано: 03.02.2015 18:46:44
ок,
???
formula
???
formula
#6 Опубликовано: 03.02.2015 19:20:22
Thanks for sharing the original formula, this makes more sense; seems you have missed or merged a parameter (alpha) with a variable (a)
Best regards,
Davide
nik.sm
Best regards,
Davide
nik.sm
If you like my plugins please consider to support the program buying a license; for personal contributions to me: paypal.me/dcprojects
#7 Опубликовано: 04.02.2015 18:04:59
this is font trouble, real value "a"
#8 Опубликовано: 04.02.2015 19:20:46
Seems strange, because in this way the formula has both mathematical sense (alpha*x^0+beta*x^2+gamma*x^4) and physical sense (homogenous units involved in the calculation)... there is some literature about this formula? (where it is used? has an author?)
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