№70-08
Influence analysis of hoisting machine vessel turning on stress state of head rubber-cable rope
I. Belmas1, D. Kolosov2, O. Dolgov2, S. Onyshchenko2, H. Tantsura1, O. Bilous1
1 Dniprovsk State Technical University, Kamianske, Ukraine
2 Dnipro University of Technology, Dnipro, Ukraine
Coll.res.pap.nat.min.univ. 2022, 70:91-98
https://doi.org/10.33271/crpnmu/70.091
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ABSTRACT
Purpose. Development of a method for determining quantitative indicators of influence of cargo rotations and a connection device and vessel rotation around the axis of a flat rubber-cable rope of a hoisting machine on its stress-strain state.
Research methodology. Construction and development of an algorithm for solving a model of a stress-strain state of a rubber-cable rope, considering tilts of cross-sections of its connection to elements of a hoisting machine and a vessel rotation around its longitudinal axis by using the methods of mechanics of layered composite materials with soft and hard layers.
Findings. Analytical expressions are constructed that allow determining quantitative indicators of influence of tilts of the cross-sections of its connection to elements of a hoisting machine and a rotation of a vessel around its longitudinal axis on a stress-strain state of a rubber-cable rope. It is established that the equal tilt of cross-sections of rope ends connections in opposite directions compared to turning in one direction practically leads to a double increase in a loading of ropes. It is also established that extreme stress values are reached in the cross-sections of rope connection in the outermost cables and in the outermost layers of rubber. Vessel rotation around the longitudinal axis of the rope is accompanied by the rope taking a shape of a surface of a straight helicoid, and the cables take shape of helical lines. The radii of helical lines are proportional to the distance between the cables and the axis of the rope.
Scientific novelty. The character of influence of tilts by the cross-sections of rope connection to hoisting machine elements and rotation of a load or vessel around its own longitudinal axis on a stress-strain state of a flat rubber-cable rope of the hoisting machine is established.
Practical significance. A methodology for determining quantitative indicators of influence of tilts of a load and a connection device and vessel rotation around the axis of a flat rubber-cable rope of a hoisting machine is developed. This makes it possible to increase the safety of operation of a hoisting machine with a flat rubber-cable head rope, considering the conditions of operation with the vessel rotation around its own axis, for example, on a floating vehicle or in a mine shaft with disturbed geometry, and to justify the use of rubber-cable ropes as ropes of capital structures, including in the conditions of spatial deformation of rubber-cable ropes.
Keywords: vessel, hoisting machine, stress-strain state, flat rubber-cable rope, vessel rotation, mathematical model, boundary conditions.
References
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