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Rollover Prediction for Ro-Ro Cargo Trailers
KTH, School of Engineering Sciences (SCI), Mechanics.
2013 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

‘High and heavy’ cargo units are carried around the world on roll-on-roll-off

(ro-ro) ships. These cargo units are loaded and unloaded using rolltrailers and

the risk of rollover for the trailer-cargo unit, during port manoeuvre, often

needs to be assessed in short time. On request by Wallenius Marine AB in

Stockholm, this thesis examines the dynamics of the rolltrailer and different

methods to predict the risk of rollover. The objective is to present a theoretical

foundation for a toolbox that can support the assessment of trailer-load


The study focuses on the effect of running over ‘bumps’. An analytic model,

based on assumptions of the transfer of energy in the rollover scenario, as well

as a simulation, within the SimMechanics environment, was developed and the

two were compared. The models produced almost identical output under the

circumstances specified. The conclusion was that the assumptions made in the

analytic model were reasonable and that the model can be used to characterize

the trailer-cargo unit’s stability. The major reservation was that some dynamic

properties of the trailer had been neglected and that the model does not

account for a sequence of inputs and resonance effects.

The recommendation given is to develop the analytic model to an application

for practical use. A developed SimMechanics simulation, on the other hand,

can be used to examine additional dynamic aspects, resonance effects and

other types of influences. Such results could support the decision making

regarding what safety margin should be applied to the analytic result.

Place, publisher, year, edition, pages
2013. , 41 p.
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-133223OAI: diva2:660260
Educational program
Master of Science in Engineering -Engineering Physics
Available from: 2013-10-29 Created: 2013-10-29 Last updated: 2013-10-29Bibliographically approved

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