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.

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.

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.

Failure Analysis of a Redundant Reeving Hoist

1976 ◽  
Vol 98 (4) ◽  
pp. 1166-1169
Author(s):  
A. J. Edmondson
Keyword(s):  
Failure Analysis ◽  
Wire Rope ◽  
Single Component ◽  
Design Parameters ◽  
Component Failure ◽  
Wire Ropes ◽  
Lower Block ◽  
Critical Materials ◽  
Failure Conditions ◽  
Fail Safe

An analysis is presented of a reeving arrangement suitable for the hoisting of critical materials requiring fail-safe criteria. The system consists of two independent wire ropes symmetrically threaded through the crown and lower blocks and reeved by a single takeup drum. The analysis provides for the load in each line of the wire rope remaining after failure of one rope occurs. The motion of the lower block and load are also provided for the variety of failure conditions considered. The analysis is useful to predict the effect of various design parameters on the integrity of system in the event of a single component failure.

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.

Acoustic meta-silencer: Toward enabling ultrawide-band air-permeable noise barrier

2021 ◽  
pp. 107754632110011
Author(s):  
Mohammad Javad Khodaei ◽  
Amin Mehrvarz ◽  
Reza Ghaffarivardavagh ◽  
Nader Jalili
Keyword(s):  
Heat Transfer ◽  
Design Methodology ◽  
Heat Transfer Performance ◽  
Transmission Loss ◽  
Design Parameters ◽  
Transfer Performance ◽  
Noise Mitigation ◽  
Acoustic Cavity ◽  
Road Map ◽  
Noise Barrier

In this article, we have first presented a metasurface design methodology by coupling the acoustic cavity to the coiled channel. The geometrical design parameters in this structure are subsequently studied both analytically and numerically to identify a road map for silencer design. Next, upon tuning the design parameters, we have introduced an air-permeable noise barrier capable of sound silencing in the ultrawide band of the frequency. It is has been shown that the presented metasurface can achieve +10 dB sound transmission loss from 170 Hz to 1330 Hz (≈3 octaves). Furthermore, we have numerically studied the ventilation and heat transfer performance of the designed metasurface. Enabling noise mitigation by leveraging the proposed metasurface opens up new possibilities ranging from residential and office noise reduction to enabling ultralow noise fan, propellers, and machinery.

Momentum exchange impact damper design methodology for object-wall-collision problems

2017 ◽  
Vol 24 (14) ◽  
pp. 3206-3218
Author(s):  
Yohei Kushida ◽  
Hiroaki Umehara ◽  
Susumu Hara ◽  
Keisuke Yamada
Keyword(s):  
Optimal Design ◽  
Design Methodology ◽  
Design Parameters ◽  
Momentum Exchange ◽  
Impact Damper ◽  
One Dimensional ◽  
Practical Design ◽  
Wall Collision ◽  
Damper Design ◽  
And Control

Momentum exchange impact dampers (MEIDs) were proposed to control the shock responses of mechanical structures. They were applied to reduce floor shock vibrations and control lunar/planetary exploration spacecraft landings. MEIDs are required to control an object’s velocity and displacement, especially for applications involving spacecraft landing. Previous studies verified numerous MEID performances through various types of simulations and experiments. However, previous studies discussing the optimal design methodology for MEIDs are limited. This study explicitly derived the optimal design parameters of MEIDs, which control the controlled object’s displacement and velocity to zero in one-dimensional motion. In addition, the study derived sub-optimal design parameters to control the controlled object’s velocity within a reasonable approximation to derive a practical design methodology for MEIDs. The derived sub-optimal design methodology could also be applied to MEIDs in two-dimensional motion. Furthermore, simulations conducted in the study verified the performances of MEIDs with optimal/sub-optimal design parameters.

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.

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