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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 Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics 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.
Prosedur Pengelolaan Surat Bongkar Muat Kapal di KSOP Kelas I Tanjung Balai Karimun Muhammad, M.Rizcky Octabeareadho; Hilmy, Zakwan
RIGGS: Journal of Artificial Intelligence and Digital Business Vol. 4 No. 4 (2026): November - January
Publisher : Prodi Bisnis Digital Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/riggs.v4i4.5308

Abstract

Pengelolaan surat bongkar muat kapal merupakan bagian penting dalam pelayanan administrasi kepelabuhanan yang berfungsi untuk menjamin kelancaran kegiatan operasional, keselamatan pelayaran, serta kepastian hukum bagi pengguna jasa pelabuhan. Di Kantor Kesyahbandaran dan Otoritas Pelabuhan (KSOP) Kelas I Tanjung Balai Karimun, penerbitan surat bongkar muat kapal dilaksanakan melalui Seksi Lalu Lintas dan Angkutan Laut (LALA) dengan melibatkan beberapa unit kerja terkait. Penelitian ini bertujuan untuk menganalisis prosedur pengelolaan surat bongkar muat kapal serta mengidentifikasi hambatan yang terjadi dalam pelaksanaannya.Penelitian ini menggunakan pendekatan kualitatif deskriptif dengan teknik pengumpulan data melalui observasi langsung, wawancara informal dengan petugas terkait, serta studi dokumentasi selama kegiatan magang. Data yang diperoleh kemudian dianalisis melalui tahapan reduksi data, penyajian data, dan penarikan kesimpulan guna memperoleh gambaran yang komprehensif mengenai alur proses administrasi dan permasalahan yang dihadapi.Hasil penelitian menunjukkan bahwa prosedur pengelolaan surat bongkar muat kapal pada prinsipnya telah berjalan sesuai dengan ketentuan yang berlaku. Namun, dalam pelaksanaannya masih ditemukan beberapa hambatan, seperti keterlambatan pengajuan dokumen oleh agen kapal, ketidaksesuaian data administrasi, alur proses dokumen yang relatif panjang, serta koordinasi antarbagian yang belum optimal. Hambatan tersebut berdampak pada efisiensi waktu pelayanan. Oleh karena itu, diperlukan upaya perbaikan melalui penyederhanaan alur administrasi, peningkatan koordinasi internal, dan pemanfaatan sistem digital untuk meningkatkan kualitas pelayanan kepelabuhanan.
Analisis Kinerja Kantor Kesyahbandaran dan Otoritas Pelabuhan (KSOP) terhadap Kelancaran Aktivitas Bongkar Muat di Pelabuhan Tanjung Balai Karimun Jeri Haswanda; Zakwan Hilmy
Journal of Innovative and Creativity Vol. 6 No. 1 (2026)
Publisher : Fakultas Ilmu Pendidikan Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/joecy.v6i1.7251

Abstract

Ports play a strategic role in supporting the smooth flow of national logistics; therefore, the operational performance of port authorities is a crucial factor in loading and unloading activities. This study aims to analyze the role and performance of the Port Authority and Harbormaster Office (KSOP) in supporting the smoothness of loading and unloading activities of steel cargo vessels at Tanjung Balai Karimun Port. The research employs a descriptive qualitative approach, with data collected through field observations, interviews, and documentation during an internship program at KSOP Tanjung Balai Karimun. Primary data were obtained from observations of 35 steel cargo vessels with a total cargo volume of 42,000 tons, interviews with KSOP officers, port operators, and shipping agents, as well as operational documentation. Secondary data were derived from KSOP operational reports, the Inaportnet system, and relevant literature. The results indicate that KSOP performance has a significant influence on the smoothness of loading and unloading activities, as reflected by an Effective Time to Berth Time (ET/BT) ratio of 62.4%, an average vessel waiting time of 0.85 hours, and a loading and unloading productivity rate of 26 tons per hour. Operational efficiency is supported by effective coordination among KSOP, port operators, and shipping agents; however, several constraints remain, including limited supporting facilities and potential administrative delays. This study concludes that optimizing digital-based service systems and strengthening inter-agency coordination are key strategies to improving loading and unloading performance at Tanjung Balai Karimun Port..
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 Jeri Haswanda Khairiyah, Karunia Yulinda Mardalena, Novi Tria Milang Aran, Mikhael Muhammad Zaki Prawira Muhammad Zaki Prawira, Muhammad Zaki Muhammad, M.Rizcky Octabeareadho 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