On the Design of Wire Rope

1989 ◽  
Vol 111 (3) ◽  
pp. 382-388 ◽  
Author(s):  
S. A. Velinsky
Keyword(s):  
Recent Work ◽  
Design Methodology ◽  
Wire Rope ◽  
Basic Component ◽  
Current Paper ◽  
Wire Ropes ◽  
Fiber Core ◽  
Linearized Theory ◽  
Wire Strand

In recent work, a design methodology for multi-lay wire strands has been developed. The current paper expands on this earlier work to study wire ropes in which the strand is a basic component. Wire ropes with the three types of cores, independent-wire-rope-core (IWRC), fiber-core (FC), and wire-strand-core (WSC), are considered. This work further generalizes the previously developed linearized theory which, through substantiation with experiment, is felt to be reasonably accurate for most wire rope behavior. The theory is then utilized to examine various parameters in the design of wire ropes.

On the Design of Wire Rope

1988 ◽  
Author(s):  
S. A. Velinsky
Keyword(s):  
Recent Work ◽  
Design Methodology ◽  
Wire Rope ◽  
Basic Component ◽  
Current Paper ◽  
Wire Ropes ◽  
Fiber Core ◽  
Linearized Theory ◽  
Wire Strand

Abstract In recent work, Velinsky (1988) has developed a design methodology for multi-lay wire strands. The current paper expands on this work to study wire ropes in which the strand is a basic component. Wire ropes with the three types of cores, independent-wire-rope-core (IWRC), fiber-core (FC), and wire-strand-core (WSC), are considered. This work further generalizes the previously developed linearized theory which, through substantiation with experiment, is felt to be reasonably accurate for most wire rope behavior. The theory is then utilized to examine various parameters in the design of wire ropes.

Design and Mechanics of Multi-Lay Wire Strands

1988 ◽  
Vol 110 (2) ◽  
pp. 152-160 ◽  
Author(s):  
Steven A. Velinsky
Keyword(s):  
Design Methodology ◽  
Wire Rope ◽  
Design Parameters ◽  
Simple Method ◽  
Wire Ropes ◽  
Linearized Theory

Wire strands and ropes have been used extensively for many years. However, the method for designing these elements remains highly dependent on the designer’s experience. In recent years, capabilities for the analysis of wire rope have progressed to a level where a reevaluation of wire rope design is appropriate. Recently, a linearized theory has been developed that allows a relatively simple method for analyzing complex strands and wire ropes. This theory, through substantiation with experiment, is felt to be reasonably accurate for most wire rope behavior. The present paper considers multi-lay wire strands and adds generality to the linearized theory to account for strands with any number and direction of wire lays. The geometry of wire strands is investigated in detail and a design methodology for strand geometry, including sizing the wires, is devised. The theory is then utilized to examine the effects of various design parameters on strand properties.

Design and Mechanics of Multi-Lay Wire Strands

1987 ◽  
Author(s):  
S. A. Velinsky
Keyword(s):  
Design Methodology ◽  
Wire Rope ◽  
Design Parameters ◽  
Simple Method ◽  
Wire Ropes ◽  
Linearized Theory

Abstract Wire strands and ropes have been used extensively for many years. However, the method for designing these elements remains highly dependent on the designer’s experience. In recent years, capabilities for the analysis of wire rope have progressed to a level where a re-evaluation of wire rope design is appropriate. Recently, a linearized theory has been developed that allows a relatively simple method for analyzing complex strands and wire ropes. This theory, through substantiation with experiment, is felt to be reasonably accurate for most wire rope behavior. The present paper considers multi-lay wire strands and adds generality to the linearized theory to account for strands with any number and direction of wire lays. The geometry of wire strands is investigated in detail and a design methodology for strand geometry, including sizing the wires, is devised. The theory is then utilized to examine the effects of various design parameters on strand properties.

Large Wire Rope Mooring Winch Drum Analysis and Design Criteria

1980 ◽  
Vol 20 (02) ◽  
pp. 63-74
Author(s):  
K.K. Song ◽  
G.P. Rao ◽  
Mark A. Childers
Keyword(s):  
Modulus Of Elasticity ◽  
Lateral Pressure ◽  
Large Diameter ◽  
Wire Rope ◽  
Wire Ropes ◽  
Analysis And Design ◽  
Number Of Layers ◽  
Inadequate Knowledge ◽  
Wire Strand ◽  
Elasticity Number

Abstract Flange splitting (separation of the flange from the barrel) is the most common structural failure in large mooring winches. Conventionally designed winches have failed on a number of occasions when wire ropes 3 to 3.5 in (7.6 to 8.9 cm) in diameter and up to 10,000 ft (3048 m) long were employed for mooring large construction barges and semisubmersible offshore drilling units. It is believed that this is due to improper approximation of the field loading patterns on the winch, inadequate knowledge of patterns on the winch, inadequate knowledge of actual forces transmitted onto the flange and drum barrel of the winch, and/or defects in the structural joint between the flange and the drum barrel.The available design methods are often empirical, modified, or extrapolated from work done a decade ago using very small wire ropes and drums. The application of these techniques to a multilayered winch using large-diameter wire rope has proved to be unrealistic. A method is presented to calculate the flange thrust load and the barrel external pressure for winches using large-diameter mare ropes. Also, a general guide for design and analysis of such winches and the effect of the lateral modulus of elasticity of wire rope on the reduction in the layer tensions is presented. presented. Introduction Large wire rope winches increasingly are coming into use for offshore construction, pipe laying, and drilling vessels operating in deep water because of the advantages of mooring with wire or a combination of chain and wire as opposed to mooring with chain only. Winches using wire ropes 3 to 3.5 in. (7.6 to 8.9 cm) in diameter, up to 5,000 to 10,000 ft (1524 to 3048 m) long, and stacked up to 15 or more layers under high tensions have been in use. Even larger winches are being contemplated as the search for hydrocarbons and minerals expands into deeper water.An industry-wide survey revealed that several large winches used on lay barges and semisubmersible drilling units have failed in service, exposing the owners to millions of dollars in repair or replacement costs, plus the damaging downtime and delay to the programs on which these units were engaged. An programs on which these units were engaged. An indepth study into the probable causes of these failures revealed that the practical design of large winches remained empirical and that, in some instances, quality control in manufacture was not being taken seriously.Wire ropes, in general, are flattened when lateral pressure is applied. The amount of flattening or pressure is applied. The amount of flattening or compressibility varies according to lateral modulus of elasticity of wire rope, which is defined as the ratio of lateral pressure per unit length of rope to the decrease in rope diameter measured along the lines of pressure. When a wire rope is spooled on a drum, pressure. When a wire rope is spooled on a drum, due to compressibility, the applied line tensions at the middle layers tend to decrease significantly. Thus, the overall structural loading on the winch depends on the lateral modulus of elasticity, number of layers, number of wraps on each layer, and operational tension at each layer. The lateral modulus of elasticity is governed by the rope characteristics such as rope formation, method of weaving, type of core, wire strand and rope diameters, and material properties of core and wire strand. It is known that as the rope gets larger and stiffer, as the number of layers increase, and as the winding tension is maintained at a high level, the resulting forces on the barrel and the side flanges also increase. SPEJ P. 63

A Stress Based Methodology for the Design of Wire Rope Systems

1993 ◽  
Vol 115 (1) ◽  
pp. 69-73 ◽  
Author(s):  
S. A. Velinsky
Keyword(s):  
Design Process ◽  
Design Methodology ◽  
Minimum Weight ◽  
Wire Rope ◽  
Recent Analysis ◽  
Minimum Weight Design ◽  
Wire Ropes ◽  
Weight Design ◽  
System Properties ◽  
Improved Design

Wire ropes have been used extensively in a wide variety of applications for many years. However, detailed analysis capabilities for wire ropes have only been developed in the last several years. Furthermore, these capabilities have not been exploited in the design of actual systems which are still designed in an empirical manner. This paper presents a stress based design methodology for wire rope systems based on these recent analysis capabilities. In addition to wire stress, this methodology allows multiple system properties to be considered during the design process. This is in opposition to current methods which only consider rope strength, and then size other components to match that particular rope. The optimum design problem is formulated for minimum weight design. Finally, examples illustrate the usefulness of the approach and its applicability to the improved design of real systems.

A Stress Based Methodology for the Design of Wire Rope Systems

1990 ◽  
Author(s):  
Steven A. Velinsky
Keyword(s):  
Design Process ◽  
Design Methodology ◽  
Minimum Weight ◽  
Wire Rope ◽  
Recent Analysis ◽  
Minimum Weight Design ◽  
Wire Ropes ◽  
Weight Design ◽  
System Properties ◽  
Improved Design

Abstract Wire ropes have been used extensively in a wide variety of applications for many years. However, detailed analysis capabilities for wire ropes have only been developed in the several years. Furthermore, these capabilities have not been exploited in the design of actual systems which are still designed in an empirical manner. This paper presents a stress based design methodology for wire rope systems based on these recent analysis capabilities. In addition to wire stress, this methodology allows multiple system properties to be considered during the design process. This is in opposition to current methods which only consider rope strength, and then size other components to match that particular rope. The optimum design problem is formulated for minimum weight design. Finally, examples illustrate the usefulness of the approach and its applicability to the improved design of real systems.

Wire Strand and IWRC Modeling and Contact Analysis Using Finite Elements

2010 ◽  
Vol 450 ◽  
pp. 115-118
Author(s):  
Cengiz Erdönmez ◽  
C. Erdem Imrak
Keyword(s):  
Finite Element ◽  
Finite Elements ◽  
Tensile Force ◽  
Three Dimensional ◽  
Wire Rope ◽  
Torsional Stiffness ◽  
Special Treatment ◽  
Modeling And Analysis ◽  
Wire Ropes ◽  
Wire Strand

Wire ropes are constructed by using both single and nested helical wires. Three-dimensional solid modeling of nested helical wires can be done by using parametric equations and needs special treatment. Wire strands are basic components of wire ropes and independent wire rope cores (IWRC) are special type of ropes, which are used as a core for complex wire ropes such as Seale IWRC or Warrington IWRC. Large tensile force strength of the wire ropes is very important in application areas where as the small bending and torsional stiffness. In this paper, modeling and analysis of a wire strand and IWRC are investigated in a realistic manner. In addition, contact interactions between wires in a strand are analyzed and finite element results are presented.

Arrangement Characteristics and Wear Distribution of Wire Rope in Parallel Grooved Multi-Layer Winding

2013 ◽  
Vol 423-426 ◽  
pp. 842-845 ◽  
Author(s):  
Zhi Hui Hu ◽  
Yong Hu ◽  
Ji Quan Hu
Keyword(s):  
Experimental Study ◽  
Wire Rope ◽  
Wire Ropes ◽  
The Wire ◽  
Wear Damage

Based on the analysis of multi-layer winding arrangement characteristic of the wire rope in Lebus drum, the experimental study is carried on wear distribution of the wire rope in parallel grooved multi-layer winding. The result shows that, the wire rope is arranged regularly in each drum area in parallel grooved multi-layer winding; the wear of wire ropes in crossover zone is more serious than that of the parallel zone; in the same-layer wire rope winding in crossover zone, the wear damage during the wire rope winding in crossover zone at the end of each-layer drum is the most serious.

Co-Simulation Procedure for Multibody Reeving Systems

2018 ◽  
Author(s):  
Grzegorz Orzechowski ◽  
Aki M. Mikkola ◽  
José L. Escalona
Keyword(s):  
Multibody System ◽  
Wire Rope ◽  
Rigid Bodies ◽  
Arbitrary Lagrangian Eulerian ◽  
Transverse Deformation ◽  
Absolute Position ◽  
Eulerian Approach ◽  
Wire Ropes ◽  
Simulation Procedure ◽  
Flexible Wire

In this paper, co-simulation procedure for a multibody system that includes reeving mechanism will be introduced. The multibody system under investigation is assumed to have a set of rigid bodies connected by flexible wire ropes using a set of sheaves and reels. In the co-simulation procedure, a wire rope is described using a combination of absolute position coordinates, relative transverse deformation coordinates and longitudinal material coordinates. Accordingly, each wire rope span is modeled using a single two-noded element by employing an Arbitrary Lagrangian-Eulerian approach.

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