How to incorporate the pipe sliding and frictional effects in pipe soil modeling?
One can define orthotropic friction that is a function of sliding distance (see TBFIELD command). This needs to be done with APDL Commands objects. The pipe-soil macro above is if the user wants nonlinear relationship of force-deflection to mimic the soil interaction - on the other hand, if the pipe is dragging on the seabed and has nonlinear relationship of coefficient of friction with respect to sliding distance, this is treated differently via TBFIELD and contact.
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