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Structural Systems Engineering Lab
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A lab that uses analysis and experiments to determine the strength and safety of ships and offshore structures.
AboutAbout the lab
Determining the safety of large structures.
The Structural Systems Engineering Lab studies how large structures such as ships and offshore structures deform under force and how much they can withstand.
From the standpoint of structural mechanics and structural strength, the lab uses numerical analysis and experimental techniques to investigate static and dynamic deformation and strength.
The lab also develops techniques for estimating the external forces that act under severe waves, which is important for safety assessment, and examines structural configurations that excel in safety and economy.
Every day, the lab advances research aimed at "determining the safety of large structures."
Key terms
- Buckling
- A phenomenon in which a member or plate under compressive force suddenly deflects sideways at a certain load
- Ultimate Strength
- The maximum force a structure can withstand before it collapses
- Structural Reliability Assessment
- A method of evaluating the safety of a structure by treating variability in strength and loads probabilistically
- Coupled Analysis
- Analysis that combines and calculates phenomena that affect each other, such as the deformation of a structure and the flow around it
ResearchResearch themes
The lab aims to clarify the static and dynamic deformation and strength of large structures such as ships and offshore structures. Using numerical analysis and experimental techniques, it also works on estimating the external forces that act under severe waves and on examining optimal structural configurations.
*Illustrative imageBuckling and Ultimate Strength of Structures
The lab investigates how buckling, in which a structure bends when pushed by force, occurs, and how much a structure can withstand (its ultimate strength). For stiffened plates, cylindrical shells, and other structures, it follows the collapse process through numerical analysis.
*Illustrative imageStructural Safety from a Probabilistic Viewpoint
The lab works on structural reliability assessment, which treats uncertainties such as structural strength on the basis of probability theory. It studies methods for assessing safety, targeting the longitudinal bending strength of the ship hull.
*Illustrative imageEstimating External Forces from Deformation
This research estimates the forces acting on a ship hull in waves by working backward from the deformation and stress of the hull structure. It is pursued as the development of a technique for estimating the external forces that act under severe waves.
*Illustrative imageCoupled Structure–Fluid Analysis
The lab performs numerical analysis that combines phenomena in which the deformation of a structure and the surrounding flow affect each other. Its targets include behavior such as repeated buckling and plastic collapse of a ship's hull structure in waves.
MembersFaculty
- ProfessorDaisuke Yanagihara
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Ring buckling” Ida Mascolo / CC BY-SA 4.0 (cropped)
- Buckling and Ultimate Strength of Structures: “NTSB investigator and buckled steel deck of the Fern Hollow Bridge” National Transportation Safety Board / Public domain (cropped)
- Structural Safety from a Probabilistic Viewpoint: “Oil Platform Crew Transfer” GuavaTrain / CC0 (cropped)
- Estimating External Forces from Deformation: “Strain gauge” Cristian V. / CC BY 4.0 (cropped)
- Coupled Structure–Fluid Analysis: “Pressure Wave In Tube” Joris.degroote at English Wikipedia / CC BY 3.0 (cropped)
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