search

perryjohnson / spardesign

parametric analysis of biplane spars
1 stars 1 forks source link

AXIAL_COORDINATE crashes DYMORE #20

Open perryjohnson opened 12 years ago

perryjohnson commented 12 years ago

for now, just use ETA_COORDINATE ...

we can write some Python scripts to translate an AXIAL_COORDINATE into a local ETA_COORDINATE for each section of the biplane spar

whophil commented 8 years ago

I just found this via Google. :smile:

whophil commented 8 years ago

This is an issue with curves which are not straight. When the curve is a straight line, the eta coordinate is exactly equal to s/S, where s is the local curvilinear coordinate and S is the total curve length. But for actual curves, eta is in general not a linear function of curvilinear coordinate (although it does equal 0 at the start and 1 at the end of the curve).