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Journal : Proceedings Conference on Marine Engineering and its Application

Analisis Getaran Pondasi Pada Mesin Induk Akibat Penambahan Plat Kapal KMP Dharma Kartika VIII Abrian Wira Syaputra; Adi Wirawan Husodo; Heroe Poernomo
Proceedings Conference on Marine Engineering and its Application Vol 6 No 1 (2023): Conference on Marine Engineering and its Aplication
Publisher : Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cmea.v6i1.2634

Abstract

Vibration is a response from a mechanical system that occurs due to the excitation force given.Vibration on the Main Engine foundation is very influential on the construction. As in ro-ro ships thatexperience changes to the main engine, which in the end also requires the addition of plates on the mainengine foundation to fulfill the alignment value between the main engine and the gearbox. This FinalProject discusses the vibrations that occur in the ship's main engine foundation using mathematicalmodeling methods. Mathematical modeling is used to determine the system that works in a mathematicalstatement. Preliminary analysis conducted to determine the value of mathematical modeling. Thedeflection and stiffness values also affect the vibration response that occurs in the main enginefoundation. This mathematical modeling produces a vibration response in the form of a vibrationresponse equation and the resulting equation can produce a graph by entering the equation into theMatlab software. The vibration response graph uses two variations, namely at 85% RPM and 100% RPM.From the calculation results obtained amplitude values of 0.179 mm at 85% RPM and 0.199 mm at 100%RPM before adding the plate. And has an amplitude value of 0.172 mm at 85% RPM and 0.191 mm at100% RPM after adding the plate. According to the ABS the recommended displacement is below 1.0 mmand the probability of damage is above 2.0 mm. This shows that the vibrations that occur in this structureare permitted.
Perencanaan Konfigurasi Layout Slipway Untuk Meningkatkan Kapasitas Winch Pada Galangan X Muhammad Irzam Amrizal; Adi Wirawan Husodo; Heroe Poernomo
Proceedings Conference on Marine Engineering and its Application Vol 6 No 1 (2023): Conference on Marine Engineering and its Aplication
Publisher : Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cmea.v6i1.2674

Abstract

This research the planning of slipway layout configuration to increase the capacityof the existing winch at the shipyard. The slipway layout configuration includes several thingssuch as slipway layout, number of Pulleys turns, Pulley position, and ground conditions. Thisresearch aims to determine the maximum safe working load value of wire rope, the pullingforce of each ship that will be docking, and the appropriate number of turns on the Pulley. Theship variations used to plan the slipway layout configuration are 10813 DWT container ship,8200 DWT container ship and 7080 DWT cargo ship. Variations are made to determine thenumber of Pulley requirements and Pulley windings for each ship that will be docked. Themaximum force calculation results show that the 10813 DWT container ship requires 13 Pulleywindings. while the 8200 DWT container ship requires 11 Pulley windings. The 7080 DWTship requires 9 Pulley windings. In planning the slipway layout configuration to increase thewinch capacity, 1 Pulley is added to the fixed pulley and 1 Pulley to the moving Pulley so that13 turns are obtained.
Analisis Kekuatan Dan Kelelahan Konstruksi Pondasi Mesin Kapal General Cargo 6088 GT Nina Bonita; Adi Wirawan Husodo; Heroe Poernomo
Proceedings Conference on Marine Engineering and its Application Vol 6 No 1 (2023): Conference on Marine Engineering and its Aplication
Publisher : Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cmea.v6i1.2681

Abstract

A ship inspection outside the inspection schedule is called an additional inspection.The 6088 GT general cargo ship conducted an additional inspection because the mainengine failed to operate and replaced the wuxi antai power X8320ZC4B-1 engine weighing26700 kg with a yanmar 8N330-WU engine weighing 43000 kg. It is necessary to recalculatethe strength of the main engine foundation. Because the main engine foundation is thestructural support of all the loads above it including the engine itself. After the calculation ofstrength, it is necessary to calculate fatigue, after calculating the fatigue of the main enginefoundation, the estimated age of the engine foundation will be known so that the owner canschedule a replacement according to the ship's inspection schedule. In completing this FinalProject, the method used is the finite element method with input 3D modelling of thefoundation and its loading conditions in the Finite Element Method software. The results ofthe analysis can be seen from the load given of 421400 N with variations in the main engineat 100% rpm conditions and at service speed, the maximum stress obtained is 39.935 MPawith a permit stress value of 230 MPa, while the maximum deformation that occurs is 0,097mm with a permit deflection value of 12.300 mm. Then obtained a cycle value of 82129000,the estimated fatigue life of the main engine foundation is 25.65 years