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PREDIKSI GERAK HEAVE DAN PITCH KAPAL FERI DI GELOMBANG NONLINEAR MENGGUNAKAN A COUPLED EULERIAN SCHEME WITH LAGRANGIAN PARTICLE Baso, Suandar; Asri, Syamsul; Rosmani, .
JURNAL RISET TEKNOLOGI KELAUTAN Vol 10, No 2 (2012)
Publisher : Ikatan Sarjana Teknik Perkapalan UNHAS

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Prediksi gerak kapal di atas gelombang nonlinear menjadi perhatian mendalam saat ini. Sehinggabanyak peneliti berupaya keras membuat metode baru dan atau mengembangkan suatu metodeyang lebih akurat dan tepat. Oleh karena itu, pada penelitian ini kami mengembangkan suatumetode a coupled Eulerian Scheme with Lagrangian Particle dan mengaplikasikan pada berbagaijenis kapal. Pengembangan metode ini akan diaplikasikan untuk memprediksi gerak heave danpitch kapal Feri penyeberangan di gelombang nonlinear. Hasil simulasi numerik menunjukkanbahwa perbandingan time history dari elevasi gelombang hasil numerik dengan teori cukup stabilpada numerical wave tank. Selanjutnya, maksimum nilai volume error | 7,6 10 | ï2 ï´ % dan ratarata| 7,31 10 |% ï3 ï´ , ini menunjukkan bahwa numerical wave tank stabil dan dapatmengkonservasi volume air sangat baik. Tendensi dan konsistensi hasil numerik sama dengan hasildari Strip theory. Hasil gerak heave hasil numerik untuk Hw/L=0,02 dan 0,75 pada ï¬ï¯L<0,5 tidakterlalu signifikan berbeda dibandingkan dengan hasil Strip theoy, namun pada kondisi ï¬ï¯L â¥ 0.5menunjukkan nondimensional heave untuk Hw/L = 0,02 lebih kecil daripada Hw/L = 0,75.Nondimensional gerak pitch Hw/L = 0,02 dan 0,75 di sepanjang ï¬ï¯L menunjukkan hasil numeriklebih besar dibandingkan dengan hasil strip theory. Selain itu pula, nilai nondimesional gerakpitch untuk Hw/L = 0,02 lebih kecil dari nilai Hw/L = 0,75.

PERFORMA DESIGN STRIPSHIELD SEA CHEST KAPAL BASARNAS TIPE FRP36 BERDASARKAN WATER INTAKE DAN TAHANAN TAMBAHAN Sitepu, Husni; Baso, Suandar
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 (1498.866 KB)

Kapal Basarnas tipe FRP merupakan kategori kapal cepat yang digunakan untuk memberikan pertolongan bila terjadi kecelakaan / musibah, di alur pantai, sungai, danau dan laut, dengan kemampuan olah gerak yang baik, kapal berbahan Fiberglass ini memiliki bobot yang relatif ringan dengan daya mesin yang besar sehingga menghasilkan kecepatan diatas 20 Knot. Daya mesin yang besar tersebut membutuhkan supply air pendingin dari sea chest yang besar pula, sedangkan seiring bertambahnya kecepatan kapal volume air yang masuk kedalam sea chest cenderung menurun sehingga dibutuhkan design stripped shield yang mampu menyuplai kebutuhan air pendingin dari mesin.Dengan menggunakan Software Maxsurf Hull Speed maka dapat dianalisa tahanan tambahan, water intake, dan pola aliran pada striped shield sea chest. Agar dapat menganalisa pola aliran yang lebih detail di setiap kenaikan kecepatan kapal pada striped shield sea chest juga digunakan bantuan Software Ansys .Hasil penelitian ini membuktikan bahwa dengan penambahan striped shield pada seachest kapal memberikan damakan nilai tahanan kapal. Jumlah water intake yang ditimbulkan akibat adanya Striped Shield relatif bervariasi seiring perubahan kenaikan kecepatan kapal.

Strategy for Improving the Competitiveness of Shipyards in the Eastern Part of Indonesia Baso, Suandar; Musrina, M; Anggriani, Andi Dian Eka
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 17, No 2 (2020): June
Publisher : Department of Naval Architecture - Diponegoro University

In recent years, the number of shipyards in Indonesia has increased significantly to anticipate the increasing demand and the government policy regarding the Cabotage Principles and Masterplan for Acceleration and Expansion of Indonesiaâ€™s Economic Development (MAEIED), and three Archipelagic Sea-Lanes (ASLâ€™s) in Indonesia. However, shipbuilding and ship repair works have been centered in the western part of Indonesia. Therefore, this study aims to develop a potential strategy of shipyards in the eastern part of Indonesia to compete in the current market situation. The Analytical Hierarchy Process (AHP) method was used to model the strategy hierarchy and analyze the weight of sub-criteria as the internal and external factors of the shipyard competitiveness. Then, the Blue Ocean Strategy method was used to analyze the competitiveness strategy. To improve competitiveness, the shipbuilding industries in the eastern part of Indonesia have to focus intensively on reforming and upgrading several internal environment factors such as coordination and response, business network, high skill manpower, and complex ship types building ability. Besides, the shipyards also have to focus on external environmental factors, particularly on five factors that have a high influence on improving competitiveness, namely shipping company partners, networks and partnership with suppliers, government policies, human resource development, and cluster formation of shipyards.

Experimental Investigation of Bow Slamming on a Ship: The Effect of Weight and Impact Angle Baso, Suandar; Himaya, Andi Nadia; Samman, Faizal Arya; Anggriani, Andi Dian Eka; Rosmani, Rosmani
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 18, No 1 (2021): February
Publisher : Department of Naval Architecture - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/kapal.v18i1.35663

The impact pressure induced by slamming can imply physical damage on a ship. The high probability of the slamming impact is on the bow part in the actual sea state. In this present study, the slamming induced pressure on the bow flare of a ship have been investigated through the experiment. The experiment was schemed by the dropping test based on free-falling body in the wave tank, wherein the bow of the ship model was inclined in several impact angles 0Â° to 30Â° to the free-water surface. To measure slamming impact pressure acting on the bow flare, the piezoelectric sensors S1, S2, S3, S4 were attached to the bow section and installed on a computer. As the obtained results, the impact pressure on bow flare occurred in a short time duration caused by slamming. The discrepancy of the peak impact pressure between ship model weight of 2.42 kg and 7.29 kg for the impact angle 0Â° is 70.36% S1, 69.52% S2, 68.97% S3, and 68.34% S4. For the relative impact angle of 30Â°, the discrepancy is 67.02% S1, 65.73% S2, 58.51% S3, and 48.21% S4. The tendency of the peak pressure coefficient at the sequenced impact points S1, S2, S3, S4 is similar for all impact angles 0Â°, 10Â°, 20Â°, and 30Â°. The peak pressure coefficient due to the full load condition is highest in the nearest bottom part, and the peak pressure coefficients due to the lightship condition highest in the nearest bottom part caused by the small impact angle.

PERFORMA DESIGN STRIPSHIELD SEA CHEST KAPAL BASARNAS TIPE FRP36 BERDASARKAN WATER INTAKE DAN TAHANAN TAMBAHAN Husni Sitepu; Suandar Baso
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 (1498.866 KB)

Kapal Basarnas tipe FRP merupakan kategori kapal cepat yang digunakan untuk memberikan pertolongan bila terjadi kecelakaan / musibah, di alur pantai, sungai, danau dan laut, dengan kemampuan olah gerak yang baik, kapal berbahan Fiberglass ini memiliki bobot yang relatif ringan dengan daya mesin yang besar sehingga menghasilkan kecepatan diatas 20 Knot. Daya mesin yang besar tersebut membutuhkan supply air pendingin dari sea chest yang besar pula, sedangkan seiring bertambahnya kecepatan kapal volume air yang masuk kedalam sea chest cenderung menurun sehingga dibutuhkan design stripped shield yang mampu menyuplai kebutuhan air pendingin dari mesin.Dengan menggunakan Software Maxsurf Hull Speed maka dapat dianalisa tahanan tambahan, water intake, dan pola aliran pada striped shield sea chest. Agar dapat menganalisa pola aliran yang lebih detail di setiap kenaikan kecepatan kapal pada striped shield sea chest juga digunakan bantuan Software Ansys .Hasil penelitian ini membuktikan bahwa dengan penambahan striped shield pada seachest kapal memberikan damakan nilai tahanan kapal. Jumlah water intake yang ditimbulkan akibat adanya Striped Shield relatif bervariasi seiring perubahan kenaikan kecepatan kapal.

Pelatihan Pengujian Inclining (Inclining Test) Kapal Kayu dengan Adanya Penambahan Panjang Kapal dan Berlunas Baja Bagi Pengrajin Kapal di Kabupaten Takalar Mansyur Hasbullah; Suandar Baso; Lukman Bochary; Rosmani -; Ganding Sitepu; Syamsul Asri; Wihdat Djafar; Andi Dian Eka Anggriani; A Ardianti; Muhammad Akbar Asis
JURNAL TEPAT : Teknologi Terapan untuk Pengabdian Masyarakat Vol 4 No 2 (2021): Community Empowerment through Health Awareness in the New Normal
Publisher : Faculty of Engineering UNHAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/jurnal_tepat.v4i2.217

Transformation in ship geometry and the development of alternative materials to replace wood will certainly have an impact on the weight of construction, these changes will certainly affect the center of gravity and ship draft, such as wooden ships with steel frames which are made by wooden ship craftsmen in Takalar Regency, after being replaced with steel frame, laden increases with an increase in the draft will affect the hydrostatic characteristics of the ship and the ship's center of gravity, the change, of course, has an impact on the stability of the ship, so an inclining test is needed, so that wooden ship craftsmen can understand the relationship between ship geometry and ship weight. Therefore, in an effort to increase the knowledge of wooden ship craftsmen, inclining test training is a solution and is proposed for community service activities with method of presenting material and practicing directly on ships, the results of this training craftsmen are able to understand the emphasis on steel-constructed wooden ships in relation to life safety at sea and skilled in inclining to test.

Sosialisasi Standar dan Prosedur Keselamatan Pelayaran Wilayah Gugus Kepulauan Sangkarrang Kota Makassar Andi Chairunnisa Mappangara; Misliah Idrus; Mansyur Hasbullah; Suandar Baso; Abd Haris Djalante; Wihdat Djafar; Andi Mursid Nugraha; Andi Dian Eka Anggriani
JURNAL TEPAT : Teknologi Terapan untuk Pengabdian Masyarakat Vol 4 No 1 (2021): Kesadaran Sosial dalam Memperkuat Kehidupan Masyarakat dalam Era Pandemi
Publisher : Faculty of Engineering UNHAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/jurnal_tepat.v4i1.169

The safety guarantee for passengers and goods on local inter-island shipping has been overlooked, particularly in the Sangkarrang island group, Makassar City. The following conditions can be seen: the loading process that neglected ship capacity, the position of passengers and goods, fewer safety equipment pieces, the poor state of the pier, and ship worthiness. The government has issued a regulation on traditional shipping safety to protect ship operation activities, such as the requirement of conventional passenger ships, which is regulated the Regulation of the Director-General of Sea Transportation Number HK.103 / 2/8 / DJPL-17 dated 18 April 2017. The program socialization is expected to give awareness of shipping safety for users and operators. This activity's output is the increasing awareness of the community, especially service users and owners of sea transportation fleets who live in the Sangkarrang archipelago, Makassar City. Through this service community program, there will be a higher awareness of the importance of shipping safety. Hence, the operators must prepare minimal safety equipment such as life jackets, buoys, and fire extinguishers on the ship. Besides, service users and ship owners can consider the risk of shipping circumstances.

Alih Teknologi Pembuatan Lunas Baja Bagi Pengrajin Kapal Kayu Tradisonal di Kelurahan Galesong Kota, Kecamatan Galesong, Kabupaten Takalar Ganding Sitepu; M.R. Firmansyah; Misliah -; W. Djafar; Rosmani -; Suandar Baso; Akbar Asis; A. Rahmat Darwis
JURNAL TEPAT : Teknologi Terapan untuk Pengabdian Masyarakat Vol 5 No 2 (2022): Mengembangkan Kehiodupan Masyarakat melalui Kesatuan dan Kekuatan
Publisher : Faculty of Engineering UNHAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/jurnal_tepat.v5i2.329

South Sulawesi is known as a place for wooden shipbuilding. The main problem faced by craftsmen is the shortage of wood. The solution, proposed the use of steel as the keel of the ship. In collaboration with the wooden boat craftsman group "Patorani" in Galesong District, Takalar Regency, an activity was held to transfer technology for making steel as a wooden ship keel. The main goal is that steel which is accepted as a wooden ship keel material, so that the shortage of wood can be substituted with steel. As a result, the belief that the wooden keel of the ship can be replaced with steel. Substitution of ship keel material with steel material based on the theory of structural strength. Activity’s outcomes are identifyed by the perceptions of the craftsmen and the views of the craftsmen. The results showed that before the activity, 90% of the crafters had heard of and were not sure that the ship's keel could be made of steel. After the socialization and demonstration activities, it turned out that only one out of 15 participants still doubted that ships were made of steel. The conclusion of this activity is that the craftsmen are ready to apply the innovative technology of replacing wooden keels with steel materials.

Sosialisasi Teknologi Lunas Baja Bagi Pengrajin Kapal Kayu di Kecamatan Galesong Kabupaten Takalar Lukman Bochary; Mohammad Rizal Firmansyah; Suandar Baso; Farianto Fachruddin; Mansyur Hasbullah; Rosmani Rosmani; Andi Dian Eka Angriani; Muhammad Akbar Aziz; Ganding Sitepu; Misliah Misliah; Abdul Haris Djalante
JURNAL TEPAT : Teknologi Terapan untuk Pengabdian Masyarakat Vol 5 No 2 (2022): Mengembangkan Kehiodupan Masyarakat melalui Kesatuan dan Kekuatan
Publisher : Faculty of Engineering UNHAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/jurnal_tepat.v5i2.339

As the main material, wood is required in the process of wooden ships building. The required wood must be water resistant especially for the construction of the ship wooden plank as well as wood in intact form for use on the keel of the ship to support the ship frames. It is increasingly difficult to obtain the required wood for the keel construction need since the requirements for the integrity of the keel construction which must continue throughout the ship. This condition threatens the sustainability of the wooden ship construction process in Indonesia. Hence, material alternative is urgently required for wood substitution for the ship keel. A study has been conducted with a recommendation of a steel keel (dimensions and shape of the keel) as a substitute for a wooden keel for certain ship dimensions. Socialization of this new technology needs to be done to wooden ship craftsmen in South Sulawesi in particular. The partners chosen in this activity were the member of the wooden boat craftsman group "Torani" in Galesong Kota District, Takalar Regency. The aim is to introduce steel material as a substitute for wood material in the wooden ship keel construction to overcome the difficulty of obtaining wood for the ship keel construction. The result shows that the majority of participants claim to have new knowledge and believe that it is possible to apply the technology to wooden ship construction. However, since the manufacture and installation of steel keels on wooden ships uses steel materials, the application of this technology will take a relatively longer time.

Pelatihan Tarik Kapal Ikan Ukuran Kecil untuk Penentuan Tahanan dan Daya Kapal di Kabupaten Takalar Suandar Baso; Muhammad Akbar Asis; Rosmani Rosmani; Lukman Bochary; Mansyur Hasbullah; A.Dian Eka Anggriani
JURNAL TEPAT : Teknologi Terapan untuk Pengabdian Masyarakat Vol 6 No 1 (2023): Kesadaran Teknologi untuk Mengatasi Permasalahan Kemasyarakatan
Publisher : Faculty of Engineering UNHAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/jurnal_tepat.v6i1.365

The ship's resistance is important to know because correlates strongly to the power engine needs to reach the desired speed. One method can be applied on a small ship with full-scale free running within a ways pull small ship with other small ship for measure resistance value occurrence with scale equipment on the place between the ropes of the ship being towed and tugged. This method is very easy to apply to small ships. In general, manufacturers of traditional small ships do not carry out the full-scale test because they do not know the principles for determining engine power.

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