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All Journal WAVE: Jurnal Ilmiah Teknologi Maritim
I Ketut Suastika
Fakultas Teknologi Kelautan, Institut Teknologi Sepuluh Nopember
Control & Systems Engineering Energy Engineering Mechanical Engineering Transportation

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Analysis of the Effect of Hull Vane Lifting Force on Fast Vessel Resistance: Straight Hull Vane Nafiri Muhammad Kautsar; I Ketut Suastika
WAVE: Jurnal Ilmiah Teknologi Maritim Vol. 17 No. 1 (2023)
Publisher : National Research and Innovation Agency (BRIN Publishing)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/wave.2023.926

Abstract

In previous studies by Saputra, the use of straight Hull Vane® increased ship's resistance. Based on hypothesis, this was caused by lifting force from Hull Vane® being too large, so that ship experienced bow trim. To reduce bow trim, smaller Hull Vane® was made including Hull Vane® with AR = 8.5, AR = 22.9 and AR = 28.94 with speeds which were 11 knots (Fn = 0.34), 17 knots (Fn = 0.53), 20 knots (Fn = 0.62) and 26 knots (Fn = 0.8). From simulation results, it was found that use of a straight Hull Vane® in every aspect ratio variation on vessel was only effective at 11 knots speed which could reduce ship's resistance up to 17%. For speeds above 11 knots, increased in aspect ratio can reduce resistance but resistance on ships with straight Hull Vane® was still greater than on ships without Hull Vane® because lift force by Hull Vane® at ship stern was still too large, so the bow of ship was more submerged than ship without Hull Vane®. This caused value of the wetted surface area (WSA) and value of hydrodynamic pressure more increased than ships without Hull Vane®, so value of ship's resistance also increased.
ANALYSIS OF NON VALUE ADDED ACTIVITY ON SHIP PRODUCTION PROCESS APPROACH CONCEPT OF VALUE STREAM MAPPING CASE STUDY AT PT. DUMAS TANJUNG PERAK SHIPYARD SURABAYA An Apriyani Tebiary; I Ketut Suastika; Buana Ma’ruf
WAVE: Jurnal Ilmiah Teknologi Maritim Vol. 11 No. 1 (2017)
Publisher : National Research and Innovation Agency (BRIN Publishing)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/jurnalwave.v11i1.2056

Abstract

Persaingan pasar industri galangan kapal dalam era globalisasi ini mendorong perusahaan untuk menyadari pentingnya meningkatkan efektivitas dan efisiensi sehingga, mampu bersaing dari segi quality, cost and on time delivery. Efektivitas produksi merupakan salah satu upaya yang harus dicapai oleh suatu industri galangan kapal untuk dapat bertahan ditengah persaingan dalam merebut pangsa pasar. Efektivitas produksi dilakukan dengan tujuan memproduksi secara ekonomis, kontinyu dan tepat waktu sampai pada customer sehingga kelangsungan hidup perusahaan dapat terjamin. Penelitian ini betujuan mengidentifikasi aktivitas yang tergolong waste dalam proses pembangunan kapal pada PT. Dumas Tanjung Perak Shipyard Surabaya sehingga dapat meminimumkan waktu produksi di industri galangan kapal. Hasil penelitian menunjukan nilai efektivitas PT. Dumas Tanjung Perak Shipyard Surabaya saat ini mencapai 85%. Pada proses perbaikan dengan penerapan value stream mapping nilai efektivitas mencapai 91%. Kesimpulan penelitian ini adalah metode value stream mapping dapat diaplikasikan alat ukur dan dapat menggambarkan aliran proses produksi di galangan kapal sehingga dapat menjelaskan secara detail aktivitas yang memberikan nilai tambah (value added) atau aktivitas yang tidak memberikan nilai tambah (non value activities).
Co-Authors An Apriyani Tebiary Buana Ma’ruf Nafiri Muhammad Kautsar