www.kxcad.net Home > CAE Index > MSC Software Index > Adams MD R2 Index

Example 1: Two Symmetric Factors

Here, you will use a tie to vary two factors together, but keep them symmetric.

Create two factors:

factor_01 Continuous, Relative, Settings=(-10, 10), Nominal= 200, tol=2
factor_02 Continuous, Relative, Settings=(-10, 10), Nominal=-200, tol=2

Tie factor_01 and factor_02 together.

In this case, Adams/Insight creates Tie_01 as a scalar tie with the attributes of the first factor, factor_01. factor_01 and factor_02 are now children of Tie_01. Their scales are +1 and -1, respectively. Their value is dictated by:

f_01.value = Tie_01.currentValue * f_01.scale
f_02.value = Tie_01.currentValue * f_02.scale

The scales are the only attributes of the tied factors that Adams/Insight now uses in the experiment. The nominal values, settings, and tolerances of the tied factors are now ignored.

When Tie_01 is set to the low value, then:

f_01.value = (Tie_01.nominalValue + Tie_01.settings.low) * f_01.scale
f_01.value = (200 + (-10) ) * 1
f_01.value = 190

f_02.value = (Tie_01.nominalValue + Tie_01.settings.low) * f_02.scale
f_02.value = (200 + (-10) ) * -1
f_02.value = -190

When Tie_01 is set to the mid value, then:

f_01.value = (Tie_01.nominalValue + Tie_01.settings.mid) * f_01.scale
f_01.value = (200 + (0) ) * 1
f_01.value = 200

f_02.value = (Tie_01.nominalValue + Tie_01.settings.mid) * f_02.scale
f_02.value = (200 + (0) ) * -1
f_02.value = -200

When Tie_01 is set to the high value, then:

f_01.value = (Tie_01.nominalValue + Tie_01.settings.high)* f_01.scale
f_01.value = (200 + (+10) ) * 1
f_01.value = 210

f_02.value = (Tie_01.nominalValue + Tie_01.settings.high)* f_02.scale
f_02.value = (200 + (+10) ) * -1
f_02.value = -210

 

Note:

The above example assume a Relative setting of the Tie; however, the same expression is valid for Absolute or Relative_Percent.