Grasshopper
Kangaroo
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Kangaroo is a Live Physics engine for interactive simulation, optimization and form-finding directly within Grasshopper.
distorted catenary by one point-mass (specific load)
hi all,
i´m trying to achieve a simply distorted catenary, adding mass to a specific point of the
catenary. The problem is that when the catenary stabilizes it doesn´t get any distortion,
is like the "mass-point" has the same mass as the rest of points (have been playing with
stiffness , damping, gravity, and mass for a while but it always stabilize as an ordinary
catenary)....
i let you the supposed distorsion and the file..
thanks a lot!!
Daniel Piker
Was this file created with an old version of Kangaroo ? Version 0.044 is now available and offers significant improvements:
https://groups.google.com/group/kangaroophysics/web/download
Regarding adding mass to a catenary, the thing to remember is that mass and weight (the force due to gravity) are two separate properties. Larger masses take more force to accelerate, but they do not automatically have more weight unless you assign it. Of course in everyday life here on the surface of the earth mass and weight always go together, but for form-finding purposes it is often quite useful to be able to treat them separately.
That said, we do intend to add a global gravity option to the kangaroo settings which would apply a force to all particles in the simulation in the -Z direction, proportional to their mass.
Feb 11, 2011