Abstract
In order to design antirotation wire rope, while considering the control of the axial strain and flexibility, the requirements that make the wire rope antirotation while making the axial strain little and flexibility excellent were presented. The relationship between axial force and twisting moment of wire rope with axial and rotational strain was given according to the linear stiffness coefficient. It was concluded that the twisting moment and axial strain under tensile load only depend on wire rope's geometry parameters which consist of helical angle and wire diameter. And the expression of bending stiffness was given. Through the analysis of an example, we find that the outer strand has a stronger effect on the tensile, torsional, and bending stiffness. And the closer the strand's helical angle is to 90°, the bigger the tensile stiffness and the bending stiffness are. The helical angles that give consideration to all the three stiffness coefficients can be found. These can be used for reference when designing antirotation wire rope.
Highlights
Wire rope was widely used in the field of mine hoist system, crane, transport machinery, and so on due to its advantages of excellent flexibility and high tensile strength
Wire rope will generate a rotary motion or twisting moment when subjected to tensile load because of its special helical structure, and the tensile and bending stiffness vary with the change of twisting parameters
The physical model and force conditions of antirotation wire rope were studied by some scholars [5,6,7,8]
Summary
Wire rope was widely used in the field of mine hoist system, crane, transport machinery, and so on due to its advantages of excellent flexibility and high tensile strength. We require the wire rope antirotation and axial elongation being not too big and the flexibility being excellent on occasion of mine hoist, crane lifting, and so forth. The axial and torsion strain of wire ropes and a single strand under axial tensile load were studied by some researchers [9,10,11,12,13]. Only one parameter was considered when antirotation wire ropes were designed. There is little research on calculation for design of antirotation wire rope, and no researches were done to colligate these three parameters. The effect of design parameters on tensile and bending stiffness was not considered. Wire rope could be designed conveniently using tensile, torsional, and bending stiffness coefficient.
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