Research on Influence of Stiffeners’ Coupling Degrees on Response Facing Blast Load and Simplified Modeling Methods

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Journal of Vibration and Shock ›› 2012, Vol. 31 ›› Issue (23) : 12-15.

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Research on Influence of Stiffeners’ Coupling Degrees on Response Facing Blast Load and Simplified Modeling Methods

Li Cong Zhang Shi-lian Liu Hui-quan Wu Shao-bo

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Abstract

In numerical analysis of hull structure’s anti-explosion capability, if coupling of all stiffeners facing blast load is considered, the workload of model building and computing time will be increased severely. In order to improve computational efficiency, the longitudinal stiffeners on local grillage structure facing blast load were modeled under multiple coupling degrees, such as entirely coupled, uncoupled and partially coupled。Based on MSC.Dytran, the influence of coupling degrees on structure response and computational time was analyzed, and the feasible way of simplified coupling degree was acquired. The result indicates that under proper situations, models with low coupling degrees can still ensure computational accuracy, while reduce the workload of model building and increase computational efficiency simultaneously.

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coupling degrees / coupling surface / stiffener / facing blast load / feasibility

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Li Cong Zhang Shi-lian Liu Hui-quan Wu Shao-bo. Research on Influence of Stiffeners’ Coupling Degrees on Response Facing Blast Load and Simplified Modeling Methods[J]. Journal of Vibration and Shock, 2012, 31(23): 12-15