Chrono link forces output

Does anyone notice or know why the link (spring) forces are all zero in ChronoLink_forces.csv? As only the heave motion is allowed, I assume there would be non-zero force in z-direction.


Another observation about hinge: since only x- and z-direction motions are allowed in 2D simulation, I suspect the hinge force in y-direction fy should be zero. The results for Pelamis case showed instead fz = 0 for all hinge links, Link_Link_arm0_arm1, etc.



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