Study of Rope Joints for Forestry Aerial Ropeway

In this article the problem of ropes joints for forestry aerial ropeway plants has been studied. The existing legislation defines in way uniform the design criterions related to the ropes in the ropeway sector. Such norm covers all the aspects related to this matter, from the criterions of sizing, to the specifications related to the top connection and to the rope splice, to the check methods and the cut off criterions. Indeed in this study a procedure it has been set up that allows with a simple algorithm to reach the formulation of the bending maximum stress rising in the joints muffs for line of the ropeway plants. In fact considering the different lines has been possible to obtain four differential equations, with second order, non homogeneous, that have been integrated with the method of the variation of the constants. For them the constants of integration have been determined calculating in correspondence of every section of transition, the deflections and the rotations of the lines that meet in it. In such way making some positions it is possible to obtain a correct formula for this case considered. Such formula is nevertheless interesting because its structure recalls that simpler and summary of Isaachsen and therefore easy results the comparison with it. By mean the computational program FEMLAB has been possible to verify the stress course inside the rope.