PSI - Issue 5

Jung Min Sohn et al. / Procedia Structural Integrity 5 (2017) 935–942 Aditya Rio Prabowo et al. / Structural Integrity Procedia 00 (2017) 000 – 000

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3.1. Ship model

The involved ships are classified into two groups, namely the striking ship which the bow part of this ship penetrates other ship or object, and the struck ship which in side collision model, side hull of this ship is subjected into penetration of the striking ship. The striking ship is modelled after a 110 m container ship, while the struck ship is a passenger with 85 m in length, 15 m in breadth and 10 m in depth. A deformable characteristic and the plastic-kinematic material are applied on the hull structure of struck ship. The yield strength is included in this analysis to the deformable structure of the struck ship, with value σ Y = 440 MPa. The failure criterion is applied to define structural failure during penetration of the striking ship and the proposed formulae of Peschmann and Lehmann (2002) is used. Both structures are discretized and modelled with the fully integrated Belytschko-Tsay shell element (ANSYS, 2013).

3.2. Scenario configuration

In collision process, the striking ship is applied with a velocity 5 m/s to approach several designated target points in vertical direction of the struck ship. This parameter is determined as changes of the height relative between the involved ships prior collision is possible. Three locations are determined which in this study the collision locations are denoted as the shell-collision , deck-collision and over deck-collision.

pper part

pper part

o er part

o er part

Fig. 1. The defined scenario model: shell-collision.

Fig. 2. The defined scenario model: deck-collision.

pper part

o er part

Fig. 3. The defined scenario model: over deck-collision.

These scenarios are given according to the relative position between the upper deck of the struck ship and the target on the struck ship. The gap between targets for each scenario model is 1 m with the shell-collision being on the lowest location among all proposed targets. Illustrations of defined scenarios are presented in Figs. 1 to 3. As contact is expected in collision, static and kinematic friction coefficients μ s = 0.35 and μ k = 0.1 are applied. The struck ship is restrained on the centerline and fixation is applied on the transverse frames and shells in the end of struck ship model.