Claim Missing Document
Check
Articles

Found 17 Documents
Search

ANALISIS KARAKTERISTIK GERAK KAPAL WORK MAINTANANCE VESSEL PADA BERBAGAI KONDISI GELOMBANG DAN BEBAN CRANE Sitepu, Ganding; Amiruddin, Syaiful
JURNAL RISET TEKNOLOGI KELAUTAN Vol 11, No 1 (2013)
Publisher : Ikatan Sarjana Teknik Perkapalan UNHAS

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Work / Maintenance Vessel merupakan kapal yang memiliki alat angkat (crane) di atas deck untukmelakukan operasi pengangkatan di lepas pantai. Pada saat operasi pengangkatan, sudut olengdan trim harus diperhitungkan, karena sudut oleng dan sudut trim yang terlalu besar dapatmembahayakan work maintenance vessel bahkan dapat sampai menenggelamkan workmaintenance vessel. Tujuan penelitian adalah mengetahui respons gerak kapal yangdisebabkan oleh beban yang diangkat dan gangguan dari luar berupa gelombang dan angin sertapengaruh oleh variasi boom crane pada saat operasi pengangkatan. Analisis gerak kapaldilakukan dengan bantuan software Moses 7.02. Dengan divariasikannya berbagai faktortersebut, maka pengaruh variasi gelombang terhadap gerak kapal sangat berpengaruh padaamplitudo gerak rolling, pitching, dan yawing yang terjadi pada ketinggian gelombangmaksimal dengan arah datang gelombang 900. Sedangkan pengaruhnya terhadap variasilengan boom relatif konstan pada tiap gerak kapal, tetapi berbeda dengan yang terjadi padagerak rolling, semakin besar sudut kerja dan panjang boom crane maka amplitudonyasemakin kecil.
KAJIAN PENGGUNAAN FASILITAS DOK SISTEM AIRBAGS DI PT. DOK DAN PERKAPALAN KODJA BAHARI GALANGAN II, JAKARTA Sitepu, Ganding; Hamzah, .; Rahman Firu, La Ode Abdul
JURNAL RISET TEKNOLOGI KELAUTAN Vol 10, No 2 (2012)
Publisher : Ikatan Sarjana Teknik Perkapalan UNHAS

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Penulisan ini bertujuan mengetahui bobot maksimum kapal yang dapat dilayani menggunakan kekuatan winch yang tersedia di PT. DKB Galangan II, jumlah kebutuhan airbags, jarak antar airbags serta tekanan airbags. Penelitian dilakukan dengan menghitung daya tarik maksimum winch dengan menggunakan sistem puli berganda, tekanan dan hambatan airbag, dan bobot kapal yang di dok. Dari hasil perhitungan, dengan kekuatan winch 105 ton , areal dok sistem airbags PT. DKB Galangan II dapat menaikkan kapal dengan bobot maksimum 1.068 ton menggunakan airbags dengan tekanan airbags standar sesuai dengan spesifikasi sebesar 27,30 ton/m.
PENATAAN HIRARKI PELABUHAN DI GUGUS PULAU DAERAH TERTINGGAL DI SULAWESI BAGIAN SELATAN DALAM KERANGKA SISTEM TRANSPORTASI NASIONAL Sitepu, Ganding
Jurnal Transportasi Vol 8, No 2 (2008)
Publisher : Jurnal Transportasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (128.067 KB)

Abstract

Abstract The islands located in an area of about 160.000 sq km in southern part of Sulawesi,  consist of 5 regencies. There are 5 big islands (more than 150 sq km each)  in this area. The economic level of these islands is still low and, therefor,  can not afford the commercial transportation tariff. Since 1974 the government of Indonesia has provided so called pioneer shipping (subsidized financially by government) in order to improve accessibility of these islands. So far, the economic level of population of these islands has not much improved. The pioneer ships are general cargo type (coaster), with long distance trips (average 1.660 sea mile) and take about 18 days for a round trip. The determination of shipping routes for servicing less developed islands are made without any deep analysis. This paper began with analysis of selecting ports in order to improve routes of the pioneer ships. To determiny an optimum sea transportation services into the area, the shipping should be classified in regional pioneer routes (main regional feeder), secondary regional feeder, and people shipping. This study found out that the total 22 ports in the area can be divided to 3 categories (hierarchy), 2 regional ports, 7 regional main ports, and 8 secondary regional feeder ports, and 5 people shipping ports.  Keywords: port hierarchy, pioneer shipping, remote islands.
ANALISIS KEKUATAN STRUKTUR “TANK DECK” KAPAL LCT AT 117 M TNI AL Sitepu, Ganding; ., Hamzah
Jurnal Riset Teknologi Kelautan Vol 14, No 1 (2016): Jurnal Riset Teknologi Kelautan (JRTK)
Publisher : Jurnal Riset Teknologi Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (884.728 KB)

Abstract

Kekuatan struktur konstruksi sangat berpengaruh pada tingkat keselamatan kapal baik pada kondisi laut yang tenang, bergelombang bahkan di atas dok . LCT (landing craft tank) adalah jenis kapal laut yang dirancang untuk mengangkut tank dan unit konstruksi berbobot ekstrim per unitnya. Konstruksi geladak tank menerima beban baik statis dan dinamis yang dipengaruhi oleh percepatan akibat dinamika kapal. Penelitian ini bertujuan mengetahui beban yang bekerja pada tank deck, menganalisis respon struktur geladak terhadap beban serta mengetahui umur struktur geladak tersebut. Analisis ini dilakukan dengan menggunakan metode elemen hingga dengan bantuan AnsysTM. Hasil penelitian menunjukkan bahwa tegangan izin tercapai pada percepatan 17,6 m/s2 yang terletak di ujung pelat yang merupakan kontak antara pelat dek dengan pelat sekat melintang dengan panjang 600 mm. Pada percepatan 17,6 m/s2, struktur geladak akan mengalami kelelahan pada umur 7,882 tahun.
PENATAAN HIRARKI PELABUHAN DI GUGUS PULAU DAERAH TERTINGGAL DI SULAWESI BAGIAN SELATAN DALAM KERANGKA SISTEM TRANSPORTASI NASIONAL Sitepu, Ganding
Jurnal Transportasi Vol 8, No 2 (2008)
Publisher : Jurnal Transportasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (128.067 KB) | DOI: 10.26593/jt.v8i2.1840.%p

Abstract

Abstract The islands located in an area of about 160.000 sq km in southern part of Sulawesi,  consist of 5 regencies. There are 5 big islands (more than 150 sq km each)  in this area. The economic level of these islands is still low and, therefor,  can not afford the commercial transportation tariff. Since 1974 the government of Indonesia has provided so called pioneer shipping (subsidized financially by government) in order to improve accessibility of these islands. So far, the economic level of population of these islands has not much improved. The pioneer ships are general cargo type (coaster), with long distance trips (average 1.660 sea mile) and take about 18 days for a round trip. The determination of shipping routes for servicing less developed islands are made without any deep analysis. This paper began with analysis of selecting ports in order to improve routes of the pioneer ships. To determiny an optimum sea transportation services into the area, the shipping should be classified in regional pioneer routes (main regional feeder), secondary regional feeder, and people shipping. This study found out that the total 22 ports in the area can be divided to 3 categories (hierarchy), 2 regional ports, 7 regional main ports, and 8 secondary regional feeder ports, and 5 people shipping ports.  Keywords: port hierarchy, pioneer shipping, remote islands.
Longitudinal Strength Analysis Considering the Cargo Load on Very Large Crude Carrier (VLCC) Suci, Indah Melati; Sitepu, Ganding; Muis Alie, Muhammad Zubair
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 18, No 3 (2021): October
Publisher : Department of Naval Architecture - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/kapal.v18i3.42349

Abstract

The ultimate strength of the Very Large Crude Carrier (VLCC) is an important aspect that must be analyzed. The purpose of this study was to analyze the ultimate strength of the VLCC ship in terms of deformation under hogging and sagging conditions on the deck and bottom. Deformation is a change in the shape or size of a material due to a workforce that is applied to you. In this case, the deformation in question arises due to the working moment. This deformation analysis was carried out using the Non-Linear Finite Element Analysis (NLFEA) method. This analysis is carried out by presenting the support or Multi-Point Constraints (MPC) in the cross-section, as well as moments of 6.52 × 1012  for hogging conditions and -5.5 × 1012  for slack conditions.
Analisis Jarak Gading dan Kekuatan Batas Struktur Kapal Ferry Ro-ro Amalia Ika Wulandari; Ganding Sitepu; Muhammad Zubair Muis Alie
Jurnal Penelitian Enjiniring Vol 22 No 1 (2018)
Publisher : Center of Techonolgy (COT), Fakultas Teknik, Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (399.391 KB) | DOI: 10.25042/jpe.052018.03

Abstract

Abstrak Perkembangan peraturan konstruksi tidak lagi mengatur jarak gading. Sehingga para perancang kapal merencanakan jarak gading yang optimal dengan batasan resiko tekuk pada pelat menurut peraturan klasifikasi, momen batas struktur kapal harus sama dengan atau lebih besar dari 1.2 kali momen lentur vertikal (sagging dan hogging). Momen lentur vertikal dihitung dengan menggunakan formulasi yang telah diberikan oleh BKI. Penelitian ini bertujuan untuk mengetahui kekuatan batas pada struktur kapal ferry Ro-Ro yang membandingkan hasil dari dua metode yaitu Metode Smith dan NLFEA. Ro-Ro adalah kapal yang menangani muatannya dengan cara rolling it on and off di atas single or series ramps. Ramps yang dapat bekerja baik saat di kapal dan dermaga. Pada penelitian ini menunjukkan perbandingan nilai hasil dari metode NLFEA lebih besar daripada metode Smith. Hal ini dikarenakan metode NLFEA dapat menghitung redistribusi beban dan interaksi antara kegagalan lokal dan global secara kompleks sehingga keakuratan hasil perhitungan metode NLFEA lebih baik daripada metode Smith. Semakin jauh jarak gading maka semakin kecil beban batas agar pelat mengalami tekuk. Kata Kunci: Kapal Ro-Ro, Penampang Melintang, Jarak Gading, Tekuk, Kekuatan Batas Abstract The development of construction's regulation is no longer determining the distance of the frame. Hence, the designers make the optimal frame distance plan with the ultimate risk of bending on the plate. According to the classification rules, the structure's ultimate moment must be equal to or greater than 1.2 times vertical bending moment (sagging and hogging). This study aims to determine the ultimate strength on the structure of a Ro-Ro ferry which comparing two methods between the Smith and NLFEA Methods. Ro-Ro is a ship that handles its cargo by rolling it on and off over a single or ramp series. Ramps that can work well on board and dock. The use of ANSYS application that applied NLFEA method in this study shows the comparison of result value of NLFEA method is greater than Smith method. This is because the NLFEA method can calculate load redistribution and the interaction between local and global failures in a complex way so that the accuracy of the NLFEA method is better than the Smith method. The further the ivory distance the smaller the load limit for the plate to buckling.
Kekuatan Batas Lambung Kapal dalam Menahan Momen Lentur Vertikal Azhar Aras Mubarak; Ganding Sitepu; Muhammad Zubair Muis Alie
Jurnal Penelitian Enjiniring Vol 22 No 1 (2018)
Publisher : Center of Techonolgy (COT), Fakultas Teknik, Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (436.849 KB) | DOI: 10.25042/jpe.052018.10

Abstract

On the life, the ship will constantly get the structural load caused by the external load of the internal waves and loads of the ship's load and the structure itself which then reaches the ultimate strength of the structure. This study aims to determine the strength of the boundary of the hull due to the vertical bending moment so that the ship structure can be guaranteed security. The analysis was done by using finite element method (FEM) by modeling the structure of the tanker section modified based on the shape of the girder box so that a simpler model is obtained. This calculation is done by using ANSYS 17 software. The calculation of vessel structure is simulated based on two existing models namely girder box model and modified tanker model. In the girder box model, ultimate strength is obtained at 6,311 x 108 Nmm for hogging conditions and -6.311 x 108 Nmm for sagging conditions. While on the tanker model, the ultimate strength obtained is -8.99 x 1012 Nmm for sagging conditions and 1.0277 x 1013 Nmm for hogging conditions.
Penjaminan Keberlanjutan Pembangunan Kapal Kayu Melalui Pelatihan Pembuatan Pola Gading untuk Penerapan Inovasi Gading Baja Sebagai Pengganti Gading Kayu bagi Pengrajin Kapal Kayu di Kabupaten Takalar Mohammad Rizal Firmansyah; Lukman Bochary; Syamsul Asri; Muhammad Rusydi Alwi; Rosmani -; Misliah Idrus; Ganding Sitepu; Wihdat Djafar
JURNAL TEPAT : Teknologi Terapan untuk Pengabdian Masyarakat Vol 2 No 1 (2019): Membangun Masyarakat yang Kuat dan Ulet
Publisher : Faculty of Engineering UNHAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (495.47 KB) | DOI: 10.25042/jurnal_tepat.v2i1.63

Abstract

Currently wood raw material used for ivory or wooden ship frames is increasingly difficult to obtain because it has a special shape, where the wood for the ship's ivory must be taken from the tree in the form of curved beams, so that it is easily shaped according to the shape of the wooden ship that will be built. Some wooden ship craftsmen in South Sulawesi have faced this difficulty. One of them is a wooden ship craftsman who is part of a group of wooden ship craftsmen "TORANI" in Galesong Kota Village, Galesong District, Takalar. This group of craftsmen specifically produces fishing vessels with sizes of 10 GT to 30 GT. To overcome this problem, an alternative solution for wood ivory is needed. A study has found an alternative substitute for wood ivory, namely steel, with dimensions suitable for use on fishing vessels of 10 GT, 20 GT, and 30 GT. The dimensions of the steel ivory obtained are close to the wood ivory but with greater strength. To be able to apply the steel ivory to the wooden ship, the partner craftsmen need to be trained in its use, starting from pattern taking, making and installing steel ivory. The target of partner activities in this service activity is in the first stage of the process of applying steel ivory to wooden ships, which is capable of making steel ivory patterns. This pattern will later be used as the basis for making steel ivory on the wooden ships they built. The method of the activity carried out was training and mentoring for partner members to make steel ivory patterns in two stages as follows: The first stage was counseling and introduction to partners regarding steel ivory as a substitute for wood ivory; and the second stage is the practice and accompaniment of technology for making steel ivory patterns. The second stage includes guiding participants using equipment and equipment for making ivory patterns and guiding the practice of making steel ivory patterns taken from the shape of wooden ships by following the curves of the wooden ship's skin.
Analisis Potensi Penyebab Kerusakan Tongkat Kemudi Kapal Sabuk Nusantara Abubakar, Andi Ahmad Zafwan; Sitepu, Ganding; Baso, Suandar
Jurnal Penelitian Enjiniring Vol 25 No 1 (2021)
Publisher : Center of Techonolgy (COT), Fakultas Teknik, Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/jpe.052021.01

Abstract

Kapal Sabuk Nusantara jenis Kapal Perintis yang merupakan kapal pengangkut barang dan penumpang yang diklaskan menurut BKI ini mengalami masalah pada sistem kemudinya terutama pada bagian tongkat kemudi beberapa kapal ditemukan mengalami kerusakan bahkan terlepas dan hilang dari porosnya selama proses pelayarannya sehingga perlu dianalisis. Metode analisis yang digunakan adalah simulasi kuantitatif untuk mendeskripsikan perbandingan kekuatan struktur, material dan analisis kekuatan, cacat produksi serta beban insidentil yang terjadi pada tongkat kemudi kapal Perintis Sabuk Nusantara di mana proses identifikasi masalah menggunakan Fishbone Diagram. Hasil yang didapat kerusakan tongkat kemudi terjadi dikarenakan beberapa potensi kerusakan pada tongkat kemudi seperti material tidak standar, temuan cacat pada material karena kegagalan produksi dan beban insidentil berupa kapal kandas, hantaman kayu serta terlilit tali pada saat proses mooring rope