Controlling the Roll Responses of Volume Carriers
Modern volume carriers such as container vessels, cruise ships and Pure Car and Truck Carriers (PCTC’s) have become more vulnerable to critical roll responses as built in margins have been traded against increased transport efficiency. The research presented in this doctoral thesis aims at enhancing...
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KTH, Skolan för teknikvetenskap (SCI)
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ndltd-UPSALLA1-oai-DiVA.org-kth-2071252017-05-18T05:30:16ZControlling the Roll Responses of Volume CarriersengSöder, Carl-JohanKTH, Skolan för teknikvetenskap (SCI)Wallenius Marine ABStockholm2017PCTCparametric rollroll responseroll dampingrudder controlaerodynamic roll dampingroll mitigationrackingIkeda’s methodCFDmodel testsFull-scale testsEngineering and TechnologyTeknik och teknologierModern volume carriers such as container vessels, cruise ships and Pure Car and Truck Carriers (PCTC’s) have become more vulnerable to critical roll responses as built in margins have been traded against increased transport efficiency. The research presented in this doctoral thesis aims at enhancing the predictability and control of these critical roll responses. The thesis presents a holistic framework for predicting and assessing the roll damping, which is a crucial parameter for predicting roll motions, based on a unique combination of full scale trials, model tests, semi-empirical methods and computational fluid dynamics. The framework is intended to be used from the early design stage and gradually improved until delivery of the ship and finally to provide input for decision support in the operation. The thesis also includes a demonstration of a new application for rudder control to be used for mitigation of parametric roll. This is performed by simulating real incidents that have occurred with PCTC’s in service. Simulations with rudder roll control show promising results and reveal that the approach could be very efficient for mitigation of parametric roll. Finally, an approach for monitoring of roll induced stresses, so-called racking stresses in PCTC’s, is presented. The approach involves measurement of the ship motions and scaling of pre-calculated structural responses from global finite element analysis. Based on full scale motion and stress measurements from a PCTC in-service the approach is evaluated and demonstrated to be an efficient alternative to conventional methods. <p>QC 20170516</p>Doctoral thesis, comprehensive summaryinfo:eu-repo/semantics/doctoralThesistexthttp://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-207125urn:isbn:978-91-7729-340-8TRITA-AVE, 1651-7660 ; 2017-22application/pdfinfo:eu-repo/semantics/openAccess |
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NDLTD |
language |
English |
format |
Doctoral Thesis |
sources |
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topic |
PCTC parametric roll roll response roll damping rudder control aerodynamic roll damping roll mitigation racking Ikeda’s method CFD model tests Full-scale tests Engineering and Technology Teknik och teknologier |
spellingShingle |
PCTC parametric roll roll response roll damping rudder control aerodynamic roll damping roll mitigation racking Ikeda’s method CFD model tests Full-scale tests Engineering and Technology Teknik och teknologier Söder, Carl-Johan Controlling the Roll Responses of Volume Carriers |
description |
Modern volume carriers such as container vessels, cruise ships and Pure Car and Truck Carriers (PCTC’s) have become more vulnerable to critical roll responses as built in margins have been traded against increased transport efficiency. The research presented in this doctoral thesis aims at enhancing the predictability and control of these critical roll responses. The thesis presents a holistic framework for predicting and assessing the roll damping, which is a crucial parameter for predicting roll motions, based on a unique combination of full scale trials, model tests, semi-empirical methods and computational fluid dynamics. The framework is intended to be used from the early design stage and gradually improved until delivery of the ship and finally to provide input for decision support in the operation. The thesis also includes a demonstration of a new application for rudder control to be used for mitigation of parametric roll. This is performed by simulating real incidents that have occurred with PCTC’s in service. Simulations with rudder roll control show promising results and reveal that the approach could be very efficient for mitigation of parametric roll. Finally, an approach for monitoring of roll induced stresses, so-called racking stresses in PCTC’s, is presented. The approach involves measurement of the ship motions and scaling of pre-calculated structural responses from global finite element analysis. Based on full scale motion and stress measurements from a PCTC in-service the approach is evaluated and demonstrated to be an efficient alternative to conventional methods. === <p>QC 20170516</p> |
author |
Söder, Carl-Johan |
author_facet |
Söder, Carl-Johan |
author_sort |
Söder, Carl-Johan |
title |
Controlling the Roll Responses of Volume Carriers |
title_short |
Controlling the Roll Responses of Volume Carriers |
title_full |
Controlling the Roll Responses of Volume Carriers |
title_fullStr |
Controlling the Roll Responses of Volume Carriers |
title_full_unstemmed |
Controlling the Roll Responses of Volume Carriers |
title_sort |
controlling the roll responses of volume carriers |
publisher |
KTH, Skolan för teknikvetenskap (SCI) |
publishDate |
2017 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-207125 http://nbn-resolving.de/urn:isbn:978-91-7729-340-8 |
work_keys_str_mv |
AT sodercarljohan controllingtherollresponsesofvolumecarriers |
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1718450002735398912 |