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KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan

KAPAL
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Published by Universitas Diponegoro

ISSN : 18298370 EISSN : 23019069 DOI : 10.14710/kapal.

Core Subject : Science,

Earth & Planetary Sciences

Jurnal ini merupakan Jurnal Ilmiah untuk mengembangkan ilmu dibidang Ilmu Pengetahuan & Teknologi Kelautan. Jurnal ini diterbitkan oleh Teknik Perkapalan Universitas Diponegoro 3 (tiga) kali dalam 1 tahun pada bulan Februari, Juni dan Oktober.

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Articles 9 Documents

Search results for , issue "Vol 6, No 2 (2009): Juni" : 9 Documents clear

ANALISA TEKNIS DAN EKONOMIS SISTEM PERBAIKAN DAUN PROPELLER YANG PATAH PADA KM. MANDIRI DUA TANPA DOCKING Manik, Parlindungan
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 6, No 2 (2009): Juni
Publisher : Department of Naval Architecture - Diponegoro University

At a sailing in a territorial to sea or river, ship propeller frequently collide object or foreign object which float, causing damage at propeller, throw in the form of curving, crack or broken at propeller blade. When this damage do not improve immediately; repaired will generate harm effect to ship construction or parts of machinery. Therefore ship should be immediately to repair (emergency docking) to improve the propeller. But is not easy to get docking space to repair because docking space schedule is very strike, existing graving dock in country. So that ship have to kick one's heels to be able to docking space, which meaning of big loss of time and also expense. The air of this research technical analysis possibility implementation to propeller repairf by floating repair system in territorial water closest with damage location of propeller and compare efficiency economic value and time if repair of propeller done in graving dock or executed by floating repair in graving dock. In this research, repair propeller without docking can be executed by arranging ship trim by arranging ballast tank to be reached space which last for working. Hereinafter worked repair of blade propeller thickly , pitch, aerofoil, wide of blade, obtained mains material type from source which have been collected by either from Owner Surveyor, picture - technique picture and also blade propeller which still goodness. Result of analysis indicate that technically repair of propeller which broken can be executed without docking and economically will be more be efficient up to 700%,in comparison with executed in Graving Dock, and will be more be efficient up to 300% when compared with executed in floating repair system

JENIS KOROSI DAN PENANGGULANGANNYA Utomo, Budi
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 6, No 2 (2009): Juni
Publisher : Department of Naval Architecture - Diponegoro University

Dewasa ini banyak sekali kerusakan yang diakibatkan oleh korosi terutama dibidang inndustri khususnya industri perkapalan. Banyak sekali kerugian yang diakibatkan oleh korosi sehingga perusahaan perlu mengeluarkan biaya extra untuk memperbaki peralatan yang mengalami kerusakan akibat korosi. Biasanya korosi terjadi pada pipa, paku, penyangga â€“ pengangga tanki, tanki dll. Jenis korosi yang biasa terjadi pada bidang industri : uniform attack ( korosi merata), galvanic corrosion (korosi galvanis), crevice corrosion (korosi celah), pitting corrosion ( korosi sumur), intergaranular corrosion ( korosi antar butir ), selective corrosion ( korosi pisah ), erosion corrosion ( korosi erosi ), stress corrosion ( korosi tekanan ), fatique corrosion ( korosi lelah ), biological corrosion.

PENGARUH BESAR ARUS LISTRIK DENGAN MENGGUNAKAN ELEKTRODA SMAW TERHADAP KEKUATAN SAMBUNGAN LAS BUTT JOINT PADA PLAT MILD STEEL Jokosisworo, Sarjito
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 6, No 2 (2009): Juni
Publisher : Department of Naval Architecture - Diponegoro University

The influence of mechanic disposition, is one of the factor influence ship strength. This influence can be test by mechanical test in welding butt joint. The result test database analysis can be conclude that very helpful to increase safety and quality butt joint. With steel specification C= 0,15%, Si= 0,24%, Mn= 0,88%,P= 0,018%, S= 0,034%. This material give a 90, 110, 125 ampere with SMAW AC electrode diameter 3,2 mm x 350 mm with V root and 600 angle In the fabrication of mild steel products, components or equipment, manufacturers employ welding as the principal joining method. Mild steel are weldable materials, and a welded joint can provide optimum corrosion resistance, strength, and fabrication economy. However, designers should recognize that any metal, including stainless steels, may undergo certain changes during welding. It is necessary, therefore, to exercise a reasonable degree of care during welding to minimize or prevent any deleterious effects that may occur, and to preserve the same degree of corrosion resistance and strength in weld zone that is an intheren part of the base metal

PEMELIHARAAN ALUR PELAYARAN DI SUNGAI BARITO Sugeng, Sunarso
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 6, No 2 (2009): Juni
Publisher : Department of Naval Architecture - Diponegoro University

Study this paper is to analyse to dimension groove Barito River navigation , existing plan this time to get dimension groove appropriate sea transport of technical conditions for the shake of safety, security and fluency accomodated by ship dimension - ship getting through it especially for the merchantman of big ship and, most ideal dredging volume is 1,537,261.48m3 that way there is addition of deepness groove from 5m becoming 5,4m LWS and wide reduction of path sea transport of external sill River Barito from 100m becoming 96m, so that can be supporting productivity of Port Trisakti because ship loadedly 5m can enter path during 24 hours in day without depended ebb .

ANALISA PENGELASAN MILD STEEL (ST.42) DENGAN PROSES SMAW, FCAW DAN SAW DITINJAU DARI SEGI KEKUATAN DAN NILAI EKONOMIS Hadi, Eko Sasmito
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 6, No 2 (2009): Juni
Publisher : Department of Naval Architecture - Diponegoro University

In this era, the growth of welding technology is very fast, especially in newship building and repairing ship construction. The welding work often rise the delaying which cause of lost of cost, time and material consumables. Developing of speed and efficient welding work have to choose the welding methode to be suitable with site condition. This research will explain the differences of three welding methods consist of SMAW, FCAW and SAW weld methode based on strengthening and economic value. The strengthening of welding result are tested by dectructive test consist of tensile, bending and impact test. It carried out the calculation of weld cost per kgs, weld speed per meter and electrode consumption to know the differences of economic value for all that welding material. The test result showed that no differences of tensile strength between SMAW, FCAW and SAW welding methode, max. 1 %, but SMAW weld methode have yield strength 4 % better than FCAW weld methode and 14 % better than SAW weld methode. FCAW weld methode ductility value 34 % mare than SMAW weld methode and 37 % more than SAW weld methode. FCAW weld methode have economic value 67 % more than SMAW weld methode and 42 % more than SAW weld methode. SAW weld methode on horizontal weld position have speed 63 % more faster than FCAW weld methode and 72 % more faster than SMAW weld methode. SAW weld methode have electrode consumption 6 % more efficient than FCAW weld methode and 50 % more efficient than SMAW weld methode.

PROSEDUR PENGELASAN Yudo, Hartono; Jokosisworo, Sarjito
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 6, No 2 (2009): Juni
Publisher : Department of Naval Architecture - Diponegoro University

Welding Procedure atau prosedur pengelasan merupakan hal yang sangat penting di dalam pengelasan. Sebelum pengelasan dilapangan dilaksanakan harus dirinci secara tertulis semua hal yang menjadi persyaratan pengelasan yaitu: pemilihan logam induk, logam las, jenis las, tipe sambungan, urutan pengelasan, tanda-tanda pengelasan, pengawasan sebelum pengelasan, selama pengelasan dan setelah pengelasan, serta spesifikasi semua bahan dan alat yang digunakan .Dengan adanya prosedur pengelasan ini dapat dihindari kesalahan dalam pelaksanaan pengelasan.

PENGARUH PENAMBAHAN GAS O2 PADA PENGELASAN CO2 DENGAN MENGGUNAKAN ELEKTRODA INTI FLUKS DAN SOLID TERHADAP SIFAT MEKANIS DAN VISUAL BASE METAL ST42 MARINE PLAT Budi Santosa, Ari Wibawa
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 6, No 2 (2009): Juni
Publisher : Department of Naval Architecture - Diponegoro University

Weld CO2 is processing electric arc welding where gas carbondioksida or CO2 as component of metal fluid canopy where at welder process there will be liquefaction of metal, in order not to invite oxidation process, what causes the happening of porosity at weldment metal. Where porosity will reduce strength to draw the metal. At welder process surely happened liquefaction process of metal. Liquefaction of the metal because hot influence where temperature dissociation energy of diatomic used by electric current and oksidator attachment, to get strong weld joint is by enough temperature to liquefy metal which will be jointed, where increasingly temperature would increasingly in and the metal wide melts. If happened addition of gas O2 at welder process hence adding oxidation process meaning to increasingly temperature. In consequence is applied welding flux core electrode to lessen porosity generated by temperature. Purpose of this research to know strength value draws, bending and visual from result of weld welder CO2 with addition of gas O2 counted 0%, 5%, 10% at steel ST42 joint I plate Thick 10 mm Marine Plate with welding flux core electrode and Solid. Method used in this research is experiment method, that is experimental method directly to object. In this case steel ST42 joint I Thick plate 10 mm 24 piece weld by using gas CO2. To get research data is applied observation method by using testing machine draws and bending and test EDSA. Data which collected then is analysed the correlation. Result of research shows existence of strength difference to draw and bending and penetration depth between additions of gas O2 counted 0%, 5% and 10% with welding flux core electrode and Solid. Based on result of research suggested in doing welder kontruksi steel ST42 with Thick 10 mm joint I at weld process CO2 majoring strength to draw suggested to applies welding flux core electrode with current 230 A, while majoring strength of compress is suggested to applies electrode solid, that strength draws and compress and penetration either from result of maximum weldment.

PERPADUAN ANTARA PROPELLER DAN DAUN KEMUDI GUNA MENGOPTIMALKAN PROLPULSI DAN MANUVER KAPAL SERTA EFFISIENSI BAHAN BAKAR Ridwan, Mohd
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 6, No 2 (2009): Juni
Publisher : Department of Naval Architecture - Diponegoro University

Operational of ship influences the running cost. A old ship, day by day cash cost are higher with ageing machinery requiring constant maintenance, a rusty hull requiring regular steel replacement and high fuel oil consumption. Fuel cost are 30-45 % all of running cost. with integrated between propeller and rudder to optimum ship propulsion and manoeuvering to reduce 4-9% vesselâ€™s fuel oil consumption and energy efficiency

KAJIAN POTENSI PERIKANAN TANGKAP DAN PERTUMBUHAN JUMLAH KAPAL TANGKAP ( PURSE SEINE) DI KABUPATEN PEKALONGAN Sri Waluyo, Bambang
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 6, No 2 (2009): Juni
Publisher : Department of Naval Architecture - Diponegoro University

In this paper Growing up Catching Vessel every year in District Pekalongan become CPEU Drop in every year. One of Thegreat potential of Indonesian ocean is fishing catch. Cause Indonesia have 17.502 island and have longest margine line island after Canada about 81.000 km, with convention PBB ( UNCLOS ) 1982 Indonesia have 3,1 million km2 and additional 2,7 million km2cause we have ZEEI. The condition make Indonesia have very big Ocean potention fish catching about 6,4 Million ton/year

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