Vol 22, No 2 (2018) > Marine Engineering >

Strength Structure Analysis of Main Gate Graving Dock Using Pontoons for Condition Repairs

Budianto Budianto 1


  1. Ship Design Construction Department, Ship Building Institute of Polytechnic Surabaya, Surabaya 60111, Indonesia


Abstract: The pontoon type main gate can certainly suffered some level of damage. But full employment within the Graving Dock, the delay will affect the process of repair, because the main gate may not be opened, because there are still work processes under sea line. To accommodate these interrelated conditions, the best solution is to repair one side of the main gate and work shipbuilding in Graving Dock conducted simultaneously. The repair process conditions would require main gate structure that consists of only one part of the shell that must withstand the forces that occur, such as weight self and pressure. It considers the analysis of the strength structures of main gate Graving Dock. Finite element method can solve the problem of structural analysis using the element discretion approach to find a node or joint displacement and the forces that occur in structural repair conditions at main gate. Maximum bending stress values obtained at the main gate repair condition is at 153 mPa with allowable stress of 157 mPa. However, these conditions approaching the allowable limit, so it needs to be given on the insert can be reinforcement. For deformation 12 mm deformation is permitted by 35 mm.
Keywords: finite element, graving dock, main gate, pontoon, structure
Published at: Vol 22, No 2 (2018) pages: 109-114

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