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Hilmy, Zakwan
Universitas Karimun
Agriculture, Biological Sciences & Forestry Astronomy Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation Other

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ANALISA CACAT LAS (CRACK) PADA JOINT BUTT WELD PENGARUH DARI PENGELASAN CRANE PEDESTAL PADA PROJECT WTIV (WIND TURBINE INSTALLATION VESSEL) Sutijo, Bambang; Hilmy, Zakwan; Adi, Fajar Tyas; Susilo, Trisno
JURNAL SAINS DAN TEKNOLOGI MARITIM Vol. 25 No. 2 (2025): Maret
Publisher : UNIMAR AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33556/jstm.v25i2.445

Abstract

Wind farm transportation installation vessel (WTIV) is a vessel specifically designed to install offshore wind turbines. Most are self-elevating jack up rigs. To enable rapid relocation at the wind farm, the power plan is self during the process fabrication block, a cracked weld defect was found visually in one of the butt weld joints. The amount of support resulting from calculating the influence of the load from the crane pedestal is 494 kpa in the deck plate area where cracks were found to be defective and this can influence the occurrence of cracks in the butt joint. Meanwhile, the maximum stress calculation that can be calculated due to the crane pedestal load is σ: 0.370 N/mm2 or σ: 370Mpa on the deck plate. Meanwhile the steps to repair the welding crack so that it doesn’t happen again, what must be done is by adding support under the deck crane pedestal, while is terms of welding repair that is by carrying out welding in accordance with the WPS and welding sequence.
PENGARUH OVERHEATING TERHADAP TERJADINYA DISTORSI DAN HASIL RT PADA PENGELASAN GTAW UNTUK MATERIAL SOLID INCONEL UNS N06625 Aran, Mikhael Milang; Susilo, Trisno; Hilmy, Zakwan
JURNAL SAINS DAN TEKNOLOGI MARITIM Vol. 25 No. 1 (2024): September
Publisher : UNIMAR AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33556/jstm.v25i1.410

Abstract

WPS has several parameters that determine heat input. This research was conducted to determine the welding results when the heat input used exceeds the value specified in the WPS used in the field. The research was carried out on 3 samples that have the same dimensions, namely 2" diameter with a thickness of 5.54 mm. The research method used was quantitative experimental. The weld results are checked visuallythen continued with the NDT process in the form of RT. At each increase in heat input, there is a distortion of 4 mm and 1 number of RT weld defects in the heat input more than 10% WPS, distortion of 6 mm and 2 number of weld defects in the heat input more than 20% WPS, distortion 8 mm and 3 number of weld defects in the heat input more than 30 % WPS. The T test results show that overheating influences the occurance of distortion and RT results in GTAW welding. From the research results, it can be concluded that the higher the heat input used in the GTAW welding process for Inconel UNS N06625 material, the higher the distortion and number of weld defects in the welding results.
Penyebab Penurunan Tekanan Hydraulic Anchor Windlass pada Kapal MT Transko Taurus Adi, Fajar Tyas; Hilmy, Zakwan; Susilo, Trisno; Shakri, Muhammad
Poltanesa Vol 23 No 2 (2022): Desember 2022
Publisher : P3KM Politeknik Pertanian Negeri Samarinda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51967/tanesa.v23i2.1989

Abstract

Mesin windlass merupakan suatu alat pada kapal yang digunakan untuk menarik dan menurunkan jangkar dan biasannya dipakai juga untuk menambatkan tali pada saat kapal merapat ke dermaga. Mesin windlass juga dapat dioperasikan dengan energi listrik, energi uap, dan energi sistem hydraulic. Mesin windlass ini terdiri dari jangkar, rantai jangkar, windlass, pompa hydraulic, motor listrik. Penelitian ini menggunakan metode penelitian kuantitatif dengan mendeskripsikan secara terperinci penyebab terjadinya penurunan tekanan hydraulic pada windlass di kapal MT Transko Taurus. Dalam menentukan prioritas masalah untuk diselesaikan, peneliti juga menggunakan suatu alat pendekatan yaitu metode fishbone. Dimana metode fishbone digunakan untuk mencari faktor penyebab permasalahan yang terjadi. Hasil penelitian ini adalah terjadinya penurunan tekanan hydraulic windlass disebabkan oleh kerusakan pada seal o-ring dan kurangnya penguncian pada fitting valve. Selain itu yang membuat anchor kapal pada bagian kanan tidak bisa dinaikan dikarenakan ball valve dalam posisi close yang membuat tekanan minyak hydraulic tidak berjalan dengan semestinya. Berdasarkan hasil penelitian ini disarankan menganti seal 0-ring yang sudah rusak dengan yang baru dan crew harus mengetahui SOP dalam mengoperasiakan sistem hydraulic windlass.
Co-Authors Abdul Qayyum Redha Adi, Fajar Tyas Ahmad Dani Ahmad Dani Alyuan Dasira Andrew Pradana Putra Angga Franciska Angga Nugraha Aran, Mikhael Milang Aran, Mikhael Milang Arianti, Nisha Desfi Baridah faudiyah Doni Kurniawan Dzirrusydi, Zalmi Fajar Tyas Adi Firmansyah, Tengku Mahendra Hadiwidodo, Yoyok S. Insanu Abdilla Khairiyah, Karunia Yulinda Mardalena, Novi Tria Milang Aran, Mikhael Muhammad Zaki Prawira Muhammad Zaki Prawira, Muhammad Zaki Nur Syahroni Pradana Putra, Andrew Raja Muhammad Yusli Hardika Ridho Illahi Hutapea Risky Adiyanto, Fajar Shakri, Muhammad Sumarsono Patti, Tito Susilo, Trisno Susilo, Trisno Sutijo, Bambang TRI SUTRISNO Trisno Susilo Tyas Adi, Fajar Waidah, Dina Fara Widi Suyudi Ashari Zaki Prawira, Muhammad