Explanipedia

Impact of Surface Roughness on Interference Resistance in Delft 372 Catamarans Open

Ahmad Firdhaus, Kiryanto Kiryanto, Ahmad Fauzan Zakki, Muhammad Luqman Hakim, Husein Khalis · 2025

Surface roughness from marine biofouling significantly compromises catamaran performance, yet current models fail to predict its speed-dependent interference effects, a critical gap in sustainable vessel design. This study employs validate…

Analisis Pengaruh Multiple Repair Welding terhadap Kekuatan dan Microstructure pada Sambungan Pengelasan Baja JIS - G3101 Open

Kiryanto Kiryanto, Ahmad Firdhaus, Tri Laksana · 2025

Dalam industri manufaktur, proses perbaikan las yang dilakukan lebih dari satu kali (multiple repair gouging) seringkali digunakan untuk memperbaiki sambungan las yang cacat, namun proses pengelasan yang berulang dapat mengubah sifat mater…

THE IMPACT OF POST-WELD HEAT TREATMENT ON RE-WELDING IN SHIELDED METAL ARC WELDING JOINT ST42 STEEL Open

Kiryanto Kiryanto, Ahmad Firdhaus, Untung Budiarto, Eko Sasmito Hadi, Muhammad Ihsan · 2024

Re-welding is a technique used to repair welds that are deemed defective and in danger of causing harm. Post-weld heat treatment is a method for improving welding-induced residual stresses, microstructural changes, hardness, and toughness.…

CFD Analysis of Interference Factor in Hydrofoil-Supported Catamarans (HYSUCAT) Open

Ahmad Firdhaus, Kiryanto Kiryanto, Good Rindo, Andi Trimulyono · 2024

Catamaran, with its distinctive dual-hull design, offers unique advantages in maritime applications, including improved stability and space utilization over traditional monohull vessels. However, the interaction between the two hulls gener…

Ship Performances CFD Analysis of Hydrofoil-Supported High-Speed Catamaran Hull Form Open

Ahmad Firdhaus, Kiryanto Kiryanto, Muhammad Luqman Hakim, Good Rindo, Muhammad Iqbal · 2024

Fast ferries with efficient fuel use are becoming increasingly in demand as fossil fuels become more in short supply and metropolises expand all over the globe in coastal and estuarine environments. These criteria need to be fulfilled by t…

Analysis of perforated fixed baffle at low filling ratio to reduce sloshing using SPH Open

Naufal Azka Riadi, Andi Trimulyono, Kiryanto Kiryanto, Tuswan Tuswan, Muhammad Luqman Hakim · 2024

Prismatic tanks are used widely in various industrial applications, including marine and petroleum, due to their ease in design and storage capacity. However, these tanks often experience sloshing issues that can affect vessel stability. S…

Comparative Assessment of Magnesium, Copper, and Zinc Addition to Aluminium Waste Casting for Improving Ship Material Behaviour Open

Kiryanto Kiryanto, Tuswan Tuswan, Samuel Samuel, Ahmad Firdhaus, Dio Ergana , et al. · 2023

The aluminium industry for ship materials produces waste material that can pollute the environment. To protect the environment from material pollution, the aluminium waste recycling process can be used to develop ship material. This study …

CFD Analysis of the Influence of Marine Fouling on the Performance of High-Speed Planning Craft Open

Ahmad Firdhaus, Parlindungan Manik, Muhammad Luqman Hakim, Kiryanto Kiryanto · 2023

Marine fouling, such as heavy slime, is the result of algae and other invertebrates settling and growing on the surfaces of planning hulls that are immersed in water. This may result in a range of serious and costly economic problems. The …

Strength Analysis of LCT Lady Primus 39.5 m Ramp Door Structure Due to Changes in Tilt Angle Variations and Load Variations Open

Hartono Yudo, Kiryanto Kiryanto, Alji Fadilla Adha, Riyanto Wibowo · 2023

Of the several cases of accidents, the fall of a vehicle from a ship during loading and unloading occurred due to a break in the clevis ramp door. This study focused on the construction of the ramp door of the ship LCT Lady Primus 39.5 m. …

Numerical analysis of the effect of a foil-shaped centerbulb on vertical motion and wake on a catamaran sightseeing boat Open

Kiryanto Kiryanto, Parlindungan Manik, Muhammad Luqman Hakim, Ahmad Firdhaus · 2023

Internal and external factors will influence the ship’s ability to maneuver. Therefore, proper planning and calculations are needed to produce good ship comfort and performance in designing a vessel. One of them is paying attention to the …

Investigation of The Effect Hullvane and Bow Foil on Flat-Hull Ship Using CFD Approach Open

Andi Trimulyono, Wahyu Ananda, Kiryanto Kiryanto, Ari Wibawa Budi Santosa · 2023

The flat-hull ship design is an innovative concept that saves costs and speed-up the fabrication of the ship. Even though the flat-hull ship was hydrodynamically inefficient, some shipowners probably experienced an issue with its unusual s…

Analysis of the tensile and bending strengths of the joints of “<i>Gigantochloa apus</i>” bamboo composite laminated boards with epoxy resin matrix Open

Parlindungan Manik, Ahmad Firdhaus, Tuswan Tuswan, Kiryanto Kiryanto, Bagus Muhammad Ichsan · 2023

The need for wood in the ship building industry continues to grow every year. An alternative raw material is needed to replace wood at a more affordable price, namely, bamboo laminated boards. However, bamboo has a weak connection between …

Benchmark Study of FINETM/Marine CFD Code for the Calculation of Ship Resistance Open

Ahmad Firdhaus, I Ketut Suastika, Kiryanto Kiryanto, Samuel Samuel · 2021

Benchmarking can be used to test CFD programs for selecting turbulence models, grid dependency studies, testing different numerical schemes and source codes, and testing different boundary conditions. CFD simulation in this study uses FINE…

Seakeeping Analysis of 30 Gt Fishing Vessel Added Hull Vane During Fishing Activities Open

Deddy Chrismianto, Hartono Yudo, Kiryanto Kiryanto, Rengga Purnama · 2021

Fishing vessel is one of Indonesia primary economic sector that needs to be planned safely, comfortably, and efficiently in which those are affected by ship motions. Lower speed of ship motions provide safety during ship’s operational and …

Study of the effect on the addition of anti-slamming bulbous bow to total resistance in tugging supply vessel using CFD Open

Kiryanto Kiryanto, Deddy Chrismianto, Eko Sasmito Hadi, Ahmad Firdhaus · 2021

Anti-Slamming Bulbous Bow (ASB) is a bulbous bow that has been modified according to the Anti-Slamming principle. For waters that have varying wave heights, for example, in the East Nusa Tenggara region where waters meet the criteria for t…

Ballistic limit simulation on commercial medium carbon steel plate with surface hardening using an induction heating Open

Helmy Purwanto, Muhammad Dzulfikar, Mohammad Tauviqirrahman, Rachmad Subagyo, Kiryanto Kiryanto · 2021

Ballistic limit is a speed limit where projectile with a certain shape, angle of attack and size is not able to perforate a target with certain properties and thickness. This paper aims is to determine and analyze the ballistic limit of co…

Analysis of the effect of hull vane on ship resistance using CFD methods Open

Kiryanto Kiryanto, Untung Budiarto, Ahmad Firdhaus · 2021

The development of technology in the ship industry is remarkable with many new innovations in the effort to improve ship performances. Ship resistance is one of the aspects that is very important to be comprehended the ship's characteristi…

Prediksi Hambatan Kapal dengan Menggunakan Metode Overset Mesh pada Kapal Planing Hull Open

Abubakar Fathuddiin, Samuel Samuel, Kiryanto Kiryanto, Aulia Widyandari · 2020

ABSTRAKPrediksi hambatan kapal tipe planing lebih rumit dibanding dengan tipe displacement, hal ini disebabkan oleh gaya hidrodinamis yang lebih dominan pada bagian bawah kapal. Karakteristik hambatan kapal tipe planing sangat dipengaruhi …

Modification of 30 Gt Fishing Vessels Using Hull Vane Naca 2408 Type for Reducing Ship Resistance Open

Deddy Chrismianto, Hartono Yudo, Kiryanto Kiryanto, Narendra Rangga Dewa · 2020

With the territory of Indonesia which is mostly waters, fishing vessels are an important transportation tool in Indonesia to support the economic needs of the community, especially in coastal areas. When a ship sails, ship resistance will …

Design 30 GT Catamaran Fishing Boat with Variations of Hull Type and Inter-Demihull Length for Minimum Resistance Open

Kiryanto Kiryanto, Mohd Ridwan, Berlian Arswendo Adietya, Deddy Chrismianto, Anggita Rahmadhani Ayuningtiyas · 2020

Fuel savings are closely related to ship resistance. Research on reducing resistance continues to be done in various ways, ranging from hull modification, optimization of the propulsion system and the addition of polymer substances. Resist…

Total resistance analysis on bow form model ulstein X-bow with various angle of flare and stem angle Open

Kiryanto Kiryanto, Eko Sasmito Hadi, Ahmad Firdhaus · 2019

The current bow form named X-Bow can face waves coming towards the ship by breaking waves more subtly. Based on the Ulstein X-bow design patent, there are provisions such as angle of flare bow and stem angle. Continue the previous research…

Stability analysis of trawls type traditional fishing boat with modification of eco-friendly fishing-gear on the north coast of Central Java Open

Kiryanto Kiryanto, Mohd Ridwan, Berlian Arswendo Adietya, Deddy Chrismianto · 2018

The prohibition of the use of fishing gear trawls in Indonesia's fishing territory requires fishermen to make replacements of fishing gear against their boats. The replacement of fishing gear on the boat affects the performance of the boat…

IBM BAGI PENGRAJIN PENGECORAN LOGAM UNTUK PENINGKATAN PRODUK KOMPONEN KAPAL DI KABUPATEN TEGAL Open

Kiryanto Kiryanto, Deddy Chrismianto · 2018

Logam Aluminium merupakan logam ringan yang mempunyai ketahanan korosi dan elastisitas yang baik yang merupakan bahan dasar pembuatan komponen kapal antara lain jendela kapal nosel, klinometer Komponen kapal tersebut diproduksi oleh pengra…

Analysis of Effect of Bulbous Bow Shape to Ship Resistance in Catamaran Boat Open

Deddy Chrismianto, Kiryanto Kiryanto, Berlian Arswendo Adietya · 2018

Ship resistance is one of the main factors affecting the design of a ship. Catamaran boat is a ship with small wet surface area that able to reduce drag and improve ship power. Generally, a bulbous bow is implemented to reduce wave resista…

Analysis of Total Ships Resistance with Variation of Hull Bow Types, Ulstein X-Bow, Spherical and Tapering Bulbous Bow using CFD Method Open

Kiryanto Kiryanto, Deddy Chrismianto, Ahmad Firdhaus · 2018

ANALISA EFISIENSI PROPELLER B-SERIES DAN KAPLAN PADA KAPAL TUGBOAT ARI 400 HP DENGAN VARIASI JUMLAH DAUN DAN SUDUT RAKE MENGGUNAKAN CFD Open

Andi Trimulyono, Kiryanto Kiryanto · 2015

Salah satu aspek yang paling penting dalam pembuatan kapal adalah perencanaan sistem propulsi salah satu aspek dari sistem propulsi itu sendiri adalah perencanaan desain Propeller. Propeller merupakan salah satu aspek yang harus direncanak…

ANALISA EFISIENSI PROPELLER B-SERIES DAN KAPLAN PADA KAPAL TUGBOAT ARI 400 HP DENGAN VARIASI JUMLAH DAUN DAN SUDUT RAKE MENGGUNAKAN CFD Open

Andi Trimulyono, Kiryanto Kiryanto · 2015

Salah satu aspek yang paling penting dalam pembuatan kapal adalah perencanaan sistem propulsi salah satu aspek dari sistem propulsi itu sendiri adalah perencanaan desain Propeller. Propeller merupakan salah satu aspek yang harus direncanak…

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