Development of modular boom for single boom shipyard (SBS) cranes

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master_Paalanen_Jere_2025.pdf (4.69 MB)

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School of Engineering | Master's thesis
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Date

2025-08-26

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Major/Subject

Mechatronics

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Degree programme

Master's programme in Mechanical Engineering

Language

en

Pages

82

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Abstract

This thesis investigates the development of modular boom configurations for Single Boom Shipyard (SBS) cranes, with the goal of improving structural efficiency, manufacturing feasibility, and design productivity. The study focuses on the modularization of the crane boom’s middle section by defining standardized truss segments in two sizes. These were dimensioned based on buckling limits and evaluated through a parametric finite element method (FEM) sweep, considering various module heights and chord profiles. Structural performance was validated through comparative analysis, showing that the modular designs achieved similar stress and deflection behaviour to existing cranes, while sustaining or improving material efficiency. A simplified cost model was applied to compare fabrication effort, revealing reduced cost per kilogram for modular design. An economic break-even analysis showed that the additional cost of a module can be offset by realistic design-time savings. This study concludes that modular boom configurations offer both structural and economic benefits and provide a scalable foundation for more efficient SBS crane design workflows.

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Supervisor

Tuhkuri, Jukka

Thesis advisor

Tuomainen, Jari

Keywords

modular design, parametric optimization, truss structures, single boom shipyard cranes, structural optimization, standardization

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https://urn.fi/URN:NBN:fi:aalto-202510208314

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