The research on the gasbag supporting hull structure’s vibration response with Duhamel calculus

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Journal of Vibration and Shock ›› 2013, Vol. 32 ›› Issue (12) : 22-26.

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The research on the gasbag supporting hull structure’s vibration response with Duhamel calculus

Liu hongliang, Xia lijuan, Yulong

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Abstract

according to the interaction relationship between the hull and the gasbags in the launching process, obtain the equivalent elastic coefficient of the gasbag based on the gasbag’s stress analysis. Simplify the ship-gasbag system to the MKC system in the macro level and establish the structural dynamic model to calculate the hull’s dynamic response. Apply the Duhamel calculus to the resolution of the vibration response of the cycle exciting force which considers the damp, this is a new solving method. So get the response-solving formula and the biggest deformation’s calculation formula. Use the bulk carrier’s actual data to have FEM calculation，comparing the numerical result and theoretical result. Final, analysis the launching velocity’s and the gasbag’s working height’s influence on the ship’s response to attain a nice scheme. Hoping to provide a new and practical method for the research on the ship’s launching with gasbag.

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MKC / gasbag / Duhamel calculus / finite element analysis / damp

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Liu hongliang;Xia lijuan;Yulong. The research on the gasbag supporting hull structure’s vibration response with Duhamel calculus[J]. Journal of Vibration and Shock, 2013, 32(12): 22-26