Correlation Between the Variation Notch Radius of Side Frame Bracket Toe in Bulk Carrier Ship to Static Direct Strength Analysis used Finite Element Method

Adiyasa, I Gede Andhira Swastika (2023) Correlation Between the Variation Notch Radius of Side Frame Bracket Toe in Bulk Carrier Ship to Static Direct Strength Analysis used Finite Element Method. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Transportasi laut merupakan salah satu transportasi yang banyak diminati karena efektivitasnya, terutama untuk transportasi massal dan logistik. Namun, kapal dan struktur kelautan terkait lainnya rentan terhadap kecelakaan karena lingkungan yang keras dan kondisi pemuatan yang ekstrem. Berdasarkan laporan Lloyd's List Intelligence, sejak awal tahun 2012 hingga pertengahan tahun 2021, telah terjadi 21.746 kecelakaan kapal, 947 diantaranya mengalami kerugian total. Selain itu, dari total kapal karam, 5% disebabkan oleh kerusakan lambung kapal. Menurut Dr Ferguson (1992), banyak kegagalan yang melibatkan banjir karena kegagalan progresif pada rangka cangkang samping ruang kargo. Biasanya, braket ujung atas/bawah rangka cangkang samping rusak karena kelelahan. Ali Hassan mengatakan bahwa tegangan lokal dapat melebihi kekuatan luluh material karena tepian yang tajam dan melengkung atau lekukan di dalam komponen, yang kemudian berkembang, sehingga menyebabkan inisiasi dan penyebaran retakan lelah. Oleh karena itu, penelitian ini akan menyelidiki pengaruh variasi jari-jari takikan terhadap kekuatan jari kaki braket struktur rangka penahan beban curah. Penelitian ini menggunakan Metode Elemen Hingga (FEM) untuk menganalisis kekuatan struktur side frame bracket toe berdasarkan IACS Common Structural Rules for Oil Tankers dan Bulk Carriers. Penelitian ini menggunakan data dari M.V. Kapal Calypso dengan bobot mati 11.000 ton diperoleh dari tugas pokok line plan, desain kapal, dan desain konstruksi pada departemen teknik pelayaran, Fakultas Teknologi Kelautan, Institut Teknologi Sepuluh Nopember. Penelitian ini akan fokus pada validasi hasil tegangan von mises dan tegangan searah aksial, serta korelasi variasi deformasi total, tegangan von mises, dan tegangan langsung aksial. Hasil yang diperoleh adalah tegangan von mises maksimum dan tegangan langsung aksial yang terjadi pada jari-jari takikan jari kaki braket sisi bawah, serta pelat muka fillet braket sisi bawah tidak memenuhi kriteria aturan. Sehingga perlu dilakukan desain ulang atau dilakukan analisis kekuatan tekuk atau kelelahan secara mendalam. Korelasi antara variasi jari-jari kaki braket takik terhadap deformasi total dapat disimpulkan bahwa semakin kecil jari-jari maka semakin kecil pula deformasi yang terjadi, sedangkan tegangan von mises dan tegangan searah aksial berbanding terbalik. Maka hasil akhir yang diperoleh dari penelitian ini adalah variasi jari-jari takik braket jari kaki yang optimal adalah 300 mm, dan dapat disimpulkan bahwa semakin besar jari-jari takik braket jari kaki maka semakin baik.
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Marine transportation is one of the most demanded transportation due to its effectiveness, especially for mass transportation and logistics. However, ships and other related marine structures are prone to accidents due to the harsh environment and extreme loading conditions. According to a report from Lloyd's List Intelligence, from the beginning of 2012 to mid-2021, there were 21,746 ship accidents, 947 of which were total losses. In addition, of the total shipwrecks, 5% were caused by hull damage. According to Dr Ferguson (1992), many failures involve flooding due to progressive failure of the cargo hold side shell frames. Typically, the side shell frames' upper/lower end brackets fail due to fatigue. Ali Hassan said that local stresses could exceed the yield strength of the material due to sharp and curved edges or indentations within the component, which develops, leading to the initiation and propagation of fatigue cracks. Therefore, this study will investigate the effect of notch radius variation on the strength of the bracket toes of the bulk carrier holding frame structure. This research uses Finite Element Methods (FEM) to analyze the structural strength of the side frame bracket toes based on the IACS Common Structural Rules for Oil Tankers and Bulk Carriers. This study uses data from the M.V. Calypso ship with a deadweight of 11,000 tons obtained from the major tasks of line plan, ship design, and construction design at the shipping engineering department, Faculty of Marine Technology, Sepuluh Nopember Institute of Technology. This research will focus on the validation of von mises stress and axial direct stress results, as well as the correlation between variations for total deformation, von mises stress, and axial direct stress. The results obtained are the maximum von mises stress and axial direct stress that occurs at the notch radius of the lower side bracket toes, and the fillet face plate of the lower side bracket does not meet the rules criteria. So it is necessary to redesign or conduct an in-depth buckling strength or fatigue analysis. The correlation between variations in the radius of the notch bracket toes to the total deformation can be concluded that the smaller the radius, the smaller the deformation occurs, while von mises stress and axial direct stress are contrary. So the final result obtained from this research is that the optimal variation of the notch radius of the toes bracket is 300 mm, and it can be concluded that the larger the notch radius of the toes bracket, the better.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Bulk Carrier, Side Frame, Finite Element Method, Total Deformation, Von Mises Stress, Axial Direct Stress
Subjects:	V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM163 Hulls (Naval architecture)
Divisions:	Faculty of Marine Technology (MARTECH) > Naval Architecture and Shipbuilding Engineering > 36201-(S1) Undergraduate Thesis
Depositing User:	I Gede Andhira Swastika Adiyasa
Date Deposited:	06 Oct 2023 03:17
Last Modified:	06 Oct 2023 03:17
URI:	http://repository.its.ac.id/id/eprint/104000

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