how to model jet barrier

[gjaegy]

Hi,

I am currently thinking about what would be the best method to model jet barrier.

Jet barrier is a net crossing the runway, on military airports; it is used to slow down aircraft, which either have a break failure or a problem that prevents it to take off.

A representation of such a net is shown below.

Now, I would like the jet barrier physic object to deform when an aircraft is colliding with the net - i don't need the aircraft trajectory to be computed (it will be a "kinematic" object), all I am interested about is the net deformation.

Any idea what would be the best way to model the net ?

I am thinking at two options:
- using ropes for the physic object, and lines or bands to render the object
- using a single quad, using a soft body for physic simulation, and rendered using an opacity mask to simulate the net elements

I am not sure which of these two options would be better..
Any idea ? Is there any other method that would suit my problem ?

Thanks a lot for any feedback,
Greg

net.jpg

[gjaegy]

Hi,

I have been experiencing with this object during the last few days.

My first attempt was to create a soft body based on the visual representation of the jet barrier. However, the net tends to bend/distort quite heavily in its standard pose.

I have increased the bending constraints count, which helped, and I experienced various values for the material m_kLST and m_kAST, the best value are the same as in most of the demos, respectively 0.4 and 1.0.

However, I am still unhappy with the result, I would like the net to be much harder / stiff, and I have no idea how I could further improve this.

Please have a look at the following video showing how it is currently looking:

video (divx5)

Is it actually possible to achieve and stiffer behavior with the topology I am currently using ? Or should I change the topology ? Should I use a patch instead ?

Thanks a lot for your help !

Cheers,
Gregory

[gjaegy]

nobody ?