The difference in the uplift force at each support point of a container crane between FSI analysis and a wind tunnel test |
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Authors: | Dong-Seop Han Geun-Jo Han |
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Affiliation: | (1) Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA;(2) Department of Bioengineering, Imperial College, London, SW7 2AZ, UK;(3) Department of Biomedical Engineering, University of Iowa, 1138 SC, Iowa City, IA 52242, USA; |
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Abstract: | We analyzed the difference between FSI (fluid-structure interaction) analysis and a wind tunnel test regarding the uplift
force at each support point of a container crane and also design stowing devices — a tie-down rod and a stowage pin — and
an alarm system to prevent overturning of a container crane under wind loads. We know that FSI analysis agrees more with wind
tunnel tests than with structural analysis, but the results of FSI analysis are different from those of the tests. To evaluate
the effect of the wind load on the stability of the crane, two container cranes that are widely used in container terminals-50
ton-class and 61 ton-class container cranes-are adopted for the analytic model and 19 values are considered for the wind direction
as the design parameter. First, a wind tunnel test for the reduced-scale container crane model is performed according to the
wind direction using an Eiffel-type atmospheric boundary-layer wind tunnel. Next, FSI analysis for a full-scale container
crane is conducted using ANSYS and CFX. Then, the uplift force obtained from FSI analysis is compared with that yielded by
the wind tunnel test. Finally, a formula is suggested to compensate the difference between FSI analysis and the wind tunnel
test. |
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