How do I model a rigid anchor in the local pipe direction?
Enter 3 translational and 3 rotational stiffnesses in local direction for a horizontal pipe, add 1 rotational support about global Y direction (i.e local Y = Global Y), 2 inclined rotational supports (calculate the cosine restraint direction with respect to the pipe direction), linestop (forward and backward gaps = 0) and guide (left, right, up and down gaps = 0).