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All Journal TEKNIK KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Department of Naval Architecture Sinergi INOVTEK POLBENG Warta Penelitian Perhubungan International Journal of Marine Engineering Innovation and Research Jurnal Pasopati : Pengabdian Masyarakat dan Inovasi Pengembangan Teknologi Kolaborasi Jurnal Pengabdian Masyarakat Indonesian Journal of Maritime Technology or abbreviated (ISMATECH) Warta Penelitian Perhubungan
Andi Trimulyono
Departemen Teknik Perkapalan, Fakultas Teknik, Universitas Diponegoro
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Transportation

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Journal : Sinergi

 1 
An analysis of the effect of the bow entrance angle on ship resistance S. Samuel; Sam Timoty Frans Evan S.; Andi Trimulyono; Muhammad Iqbal
SINERGI Vol 26, No 2 (2022)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2022.2.011

Abstract

Modifying the hull shape is one of the challenges in designing a ship. The angle of the ship's entrance is a significant determinant of the total resistance of the ship. This research aimed to analyze the total resistance of the ship due to changes in the shape of the ship's bow. This research used the Computational Fluid Dynamics (CFD) method with overset mesh technique to predict the ship's total resistance and trim angle. Parameters used in the five-speed numerical simulations. This research indicated that a change in the bow angle of the ship results in a 5% change in the ship's resistance for every change in the bow entrance angle. Therefore, the prediction of total resistance shows significant results in planning conditions. Compared to another bow entrance angle at low Fr, total resistance has no noticeable differences. Angle changes of the entrance of the ship's bow also significantly affected the trim conditions on the ship according to the speed. At Fr 1.03, the stern trim angle tended to decrease dramatically. As a result, the trim by stern under porpoising probably oscillates considerably.
Analysis of empirical method for predicting maneuverability of ultra-large container ship using Maneuvering Modelling Group (MMG) model Zeinurrohman, Rangga; Trimulyono, Andi; Wicaksono, Ardhana; Hadi, Eko Sasmito; Samuel, Samuel; Hakim, Muhammad Luqman; Purwanto, Dedi Budi
SINERGI Vol 28, No 2 (2024)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2024.2.016

Abstract

International Maritime Organization (IMO) provided manoeuvrability standards for all ships above 100 m to ensure the ship's safety and surroundings. In the preliminary design stage, one way to ensure a ship's manoeuvrability under IMO standards is to use empirical methods that are cheaper and less time-consuming than model tests. Empirical methods used analysis regression to develop their formula from the model test result database, and their formula depends on ship hull parameters and dimension ratios such as , , , and . However, the database of the existing empirical formulas is limited to small-medium merchant ships and fishing vessels, as consequences for larger ships are inaccurate and have a significant error in predicting ship manoeuvres. This study modified the existing empirical formulas by adding specified ship data into the existing database and analyzing the accuracy of predicting ship manoeuvres using the Maneuvering Modelling Group (MMG) model. We verify by adding the selected ship data into the existing database, which shows improvement in predicting ship manoeuvres. The modified formulas show improvement by only giving 5% RMSE of tactical diameter and 3% RMSE of ship advance in turning manoeuvre, and this is a 78% overall improvement in predicting the turning motion of ultra-large container ships compared to previous formulas. The quantitative and qualitative produce better estimation result that indicates the right track to derive the empirical formulas for Ultra-Large Container ships.
Co-Authors A.F. Zakki Ahmad Fauzan Zakki Ahmad Firdhaus Al Ma'rif, La Ode Muh. Ayi Alfaruqi, Malik Alfi Fairuz Asna Alif Fauzan Rachmat Alvianto, Jodhy Irsyad Alviskarahma, Keizha Andy Wibowo Ari Wibawa B.S Ari Wibawa Budi Santosa Ari Wibawa Budi Santosa Ari Widyatmoko Arifuddin, Andi Mursid Nugraha Ariq Fadhlurrahman Rahardjo Ashoka Wira Parama Arta Awali , Jatmoko Azis Anjas Nugroho, Azis Anjas Aziz Abdurohman Bahtiar, Muhammad Hafids Bandi Sasmito Benny Syahputra Berlian Arswendo A Berlian Arswendo Adietya Betty Ariani Burhanuddin Putra Nirwana Daviensya Giovancha Anabel Malingkas Deddy Chrismianto Deddy Chrismianto Dedi Budi Purwanto Desto Pradika Putra Eko Didik Purwanto, Eko Didik Eko Sasmito Hadi Farhana, Annisa Firnandito, Anugrah Gary Simon good rindho Good Rindo Hafizh, Muhammad Nur Abdullah Hanyfah, Dewinta Roebiyana Hanzallahh, Muhammad Thareq Fajri Hartono Yudo Herbet Simbolon Hutabarat, Marcelino Gabriel Ignasius Sihotang Ilham Abror Imam Pujo Mulyatno Imam Pujo Mulyatno Iqbal, Muhammad Faiq Jatmiko, Arif Budi Kiryanto Kiryanto Kiryanto Kiryanto Kurniawati, Diniar Mungil Kurrohman, Faik Kusuma, Andhi Indira Luthfi Maslul Muttaqim M. Angger Kalingga M. Nurul Hidayat M. Ulil Anwar Mc. Fazjeri Ubaidilah Moh. Resi Trimulya S Muhammad Iqbal Muhammad Iqbal Muhammad Iqbal Muhammad Iqbal Muhammad Iqbal Muhammad Luqman Hakim, Muhammad Luqman Musfar, Rafi Faiqal Mustofa, Dandy Ali Nadhila Shabrina Riyanto Nadzirun Bin Basir, Nadzirun Bin Nanang Zarma Nico Dwiprasti Anando Nurul Huda Nyawa, Dewa Anjar Ocid Mursid Ocid Mursid Parlindungan Manik Parlindungan Manik Putra, Rico Ade Rifat Al Farid Riyanto, Nadhila Shabrina Rohimsyah, Fikan Mubarok Ryan Andriawan Ryan Andriawan S. Samuel Saadiyah, Devy Setiorini Safitri, Laela Sam Timoty Frans Evan S. Samsu Dlukha N Samuel . Samuel Febriary Khristyson Samuel Febriary Khristyson Samuel Samuel Samuel Samuel Samuel, S Sarjito Joko Sisworo Sarjito Joko Sisworo Septyawan Bintar Saputra Subekti, Joko Sukanto Jatmiko Susatyo, Fadhly Aldilas Syafrillia, Dewi Syahab, Husein Syaiful Tambah Putra Ahmad Taufik Hidayat Taufiq Hidayah Theonov S Nainggolan Untung Budiarto Wahyu Dwi Yunanto Wahyu Masykuri Al Hakim Wahyu Ramadhani, Wahyu Wahyu Wibowo Wahyuda, Wahyuda Wasisto Rakhmadi Weslee, Chalvin Wicaksono, Ardhana Widjaja, Raden Sjarief Widya Rahman Fitriadi Widyatmoko, Ari Wilma Amiruddin Yahdun, Finodya Yohanes Aditya Yudhistira Dwi Putra Yupiter, Frengki Zaenal Abidin Zeinurrohman, Rangga