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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Removable Bollard Design for the Royal Parks in London / Utveckling av borttagningsbar pollare för the Royal Parks i London

Saevarsdottir, Saeunn January 2014 (has links)
This report describes a Bachelor Degree project in product development completed in co-operation with the Royal Parks in London and submitted to the University of Skövde. The aim of the project was to design and develop a removable bollard intended to separate traffic in a bi-direction cycle lane in central London. The goal was to develop a lightweight yet robust removable bollard that complimented the historical surroundings and had a simple storage solution. With thorough background research, established ideation methods and strategic evaluation a suitable solution was found. The final design was an innovative bollard made out of recycled plastic and specially adapted for simple removal and storage. It is a bollard that would successfully mark the cycle lane and is both lightweight and stackable. / Denna rapport beskriver ett examensarbete i produktutveckling som utfört var i samarbete med the Royal Parks i London och inlämnat till Högskolan i Skövde. Syftet med projektet var att utforma och utveckla en borttagbar pollare tilltänkt för att separera trafik i en dubbelriktad cykelbana i centrala London. Målet var att utveckla en lätt men samt robust borttagbar pollare som passar in i Londons historiska miljö och har en enkel lagringslösning. Genom en detaljerad förstudie, kända idégenereringsmetoder och strategisk utvärdering hittades en lämplig lösning. Den slutliga designen var en innovativ pollar gjord av återvunnen plast och speciellt anpassad för enkel flyttning och förvaring. Pollaren är både lätt och stapelbar samt kan användas för att markera cykelbanor.
2

Escort tug performance prediction: a CFD method

Smoker, Brendan 20 December 2012 (has links)
As the demand for energy continues to increase around the world, more vessels used in the transport of energy, such as Liquid Natural Gas (LNG) and crude oil tankers are being built to transport energy to market overseas. The escort tug has been developed in order to assist in the safe transit of such vessels in confined waterways. Designed to apply emergency braking and steering forces to the stern of a tanker while underway, an escort tug features a hull shape that generates large hydrodynamic lift and drag forces when operating at high angles of attack, this is known as indirect mode. This escorting mode is highly effective at speeds 8 knots and above, often generating towline forces well in excess of bollard pull. Escort performance prediction is a vital aspect of the design of escort tugs. It is important to know a priori if a design will meet the necessary performance criteria. In the past, performance predictions have relied heavily on model testing and empirical methods. With the recent emergence of Computational Fluid Dynamics (CFD) as a commercially viable design tool for naval architects, extensive escort performance predictions can now be carried out more accurately in less time and at less cost than was previously possible. This thesis describes the methodology of a CFD based escort performance prediction method that is accurate and cost effective. / Graduate

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