FAILURE PROCESS OF HOISTING ROPES IN WINDING INSTALLMENTS

RoundTable – HOW SAFE IS A ROPE? – Krakow 1981

 Introduction

Failure process of hoisting ropes has been analysed for a pretty long time by scientists dealing with this problem (3, 4, 5] • A relatively precise model of increasing wear of hoisting ropes resulting from fatigue breaks of wires has been presented in the paper (4]. The model consists in· identification of function of wire breaks growth. A conversion factor has been introduced thus enabling to compare a velocity of growth of wire breaks in ropes different both in type and length. There has been also suggested a specified value of this factor, which if exceeded should make a rope be removed. In paper (3) a model of ropes wear has been identified as a sum of creeping-segment trend and random component. It is nothing but a decomposition of random process into systematic and "purely" random components.

In this paper the authors would like to consider a wear-process of hoisting ropes as a non-stationary failure process.

Author(s): by J.M. CZAPLICKI and S.BRODZINSKI