Question #707278 on Yade changed: https://answers.launchpad.net/yade/+question/707278
Ruidong LI posted a new comment: Thanks for your reply, Jan! > probably it should be opposite, Vector3(x_cyl-x, y_cyl-y, 0) to point inside > the cylinder (not outside)? Currently the membrane is stretched rather then compressed (tested with maxVelocity=100,iterPeriod=1) > That's true. We have to reverse the direction vector. >And maybe different parameters kP, kI, kD then default 1.0? > Yes. But the difficulty is that it's hard to determine proper proportional > parameters for kP, kI, and kD. > I don't know, then the behavior is also strange, the membrane is pulled > inward once there is node-sphere interaction... > Yes. I also encounter this problem. I try to reduce the maximum velocity of > servo control but still failed, only delaying the time of membrane > destruction. Actually, the PFacet is demonstrated to be effective in modelling flexible membranes successfully [1]. The problem is that there are some critical parameters such as velocity are not mentioned in this paper, which increases the difficulty for descendants to replicate the work. [1] https://doi.org/10.1061/(ASCE)GM.1943-5622.000134 -- You received this question notification because your team yade-users is an answer contact for Yade. _______________________________________________ Mailing list: https://launchpad.net/~yade-users Post to : yade-users@lists.launchpad.net Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
