Theoretical foundations of modeling the process of transport vehicles steel ropes structural defects formation

Anatoly Korotky,Nikolai Dontsov,Sergey Popov,Julianna Marchenko,Edward Marchenko

doi:10.1051/e3sconf/202017505018

Abstract

The article presents materials on the study of mathematical modeling of splicing (binding) of steel rope used to transmit traction by friction. The developed mathematical model splicing (binding) describes the stress-strain state of strands (wires) from quasistatic loads, arising in the cyclic tension process and bending of steel rope on rope sheave, in which the resultant force in steel rope cross section is shifted relative to the central axis, causing it to bend and torsion. Using experimental data, it was found that the steel rope torsion and bending is caused by the linking technology in the nodes where strands are replaced. Experimentally established, that defects on the splicing (binding) site manifested as a result of cyclic tensile and bending loads on rope sheave, which is connected to limited mobility of the strands in nodes due to cross section symmetry violation.

Highlights

In modern machinery, to use high-tech tasks, machines use cable traction
The physical modeling of steel ropes splicing process allowed the authors to establish the causes of hazardous factors arising on the splicing steel rope site [15-22]
For the normal operation of the steel rope, it is necessary that the resultant load was applied to all wires and strands in the steel rope cross section

Summary

Introduction

To use high-tech tasks, machines use cable traction. Such machines are characterized by the use of steel ropes of a closed (infinite) type, where the steel rope is a whole closed ring with section formation of its connection (docking), called splicing. In the study of the resource and durability of steel ropes operation, despite high resource of steel ropes declared by the manufacturer (15 – 20 years of exploitation), the authors noted that after 5 – 6 years dangerous factors appear at the sites of splicing (breaks, external wear of wires, rope diameter reduction as a result of core damage, loss of internal section, formation of “waviness”), which is the basis for unscheduled rope repair with replacement of the defective area and leads to significant material costs [1-14].

Results

Conclusion