NDLI: A tensioning system for use with synthetic ropes

Content Provider	IEEE Xplore Digital Library
Author	Johnson, E. Petrina, P. Phoenix, S.L.
Copyright Year	2003
Description	Author affiliation: Adv. Design Consulting, Lansing, NY, USA (Johnson, E.)
Abstract	Ropes made from Aramids, PRO and HMPE fibers have superior properties, in the longitudinal direction, when compared to those of wire ropes. A development program for the US Navy in the early 1990s sought to take advantage of these properties to design ropes that were lighter, more flexible, more resistant to corrosion and had a longer fatigue life than wire rope when used for the highline in STREAM rigs. Unfortunately the inherent weaknesses of synthetic ropes, which result from the weakness of the hydrogen bonds that connect the polymer molecules, were not considered and sample ropes failed quickly at the highline winch due to crushing and abrasion. Our approach to this problem has been to develop a tensioning system that takes advantage of the excellent longitudinal properties of synthetic ropes while avoiding the stresses that cause premature failure. Thus our emphasis has been on equipment design and the demonstration of its compatibility with synthetic ropes rather than on incremental improvements of rope properties. We have developed a system of powered sheaves that apply traction over a large area on the rope's surface and limit shear stress. The use of AC motors under flux vector control allows each sheave to be driven under torque control for precise application of tension through the system. Each sheave can run at a slightly different speed to accommodate the change in rope length as it passes through the tensioning system. N+1 design gives redundancy for greater safety and reliability. Our goal is to demonstrate that synthetics will perform better than wire rope when part of a complete, well-designed system. This system has applications in hoists, lifts and winches.
Sponsorship	Dept. of the Navy Sci. and Technol. Coalition for Enhanced Marine Resources Orincon Ceros Harbour Offshore Inc
Starting Page	1329
Ending Page	1334
File Size	604348
Page Count	6
File Format	PDF
ISBN	0933957300
DOI	10.1109/OCEANS.2003.178053
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-09-22
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	MTS
Subject Keyword	Wire Pulleys Winches Stress Optical fiber devices Corrosion Fatigue Hydrogen Polymers AC motors
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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