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Wirawan Husodo Adi
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Engineering Mechanical Engineering

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Analisa Getaran Pada Air Fin Cooler Equipment 203-E-003-M4 Akibat Misalignment Poros Samudra Budi Agung; Poernomo Heroe; Wirawan Husodo Adi
Proceedings Conference on Marine Engineering and its Application Vol 1 No 1 (2018): Conference on Marine Engineering and its Application
Publisher : Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cmea.v1i1.688

Abstract

This research performs vibration response analysis on fin cooler water system (AFC). AFC is a fan or blade equipment that rotates and driven by the motor. AFC have problems of high vibration value, so disrupting the production process. From the case obtained the purpose of research to get the value of vibration response that occurs on the shaft of water fin cooler and the influence of misalignment on the shaft. From the vibration data, analyzed the breakdown that occurred. To prevent vibration and breakdown, failure evaluation with Predictive Maintenance method is performed. In the research, the result of natural frequency is 26,77 rad/s and vibration velocity response is 0,0000392 mm/s. Vibration rate response with 0.05 mm shaft misalignment of 0,0000496 mm/s is still permitted by ISO Severity 10618-3 standard. The result of AFC reliability at 24 hours cause a reliability value of 0.995. Then the failure prediction of AFC component will occur at 15773,42 hours or 657 days, then result of the calculation of treatment time after further analysis using dynamic system predicted to be done within 1738 hours or 72 days.
ANALISA MODEL GETARAN MAIN ENGINE PADA KAPAL Kurnia Putra Iwan; Wirawan Husodo Adi; Abu Jamiin M.
Proceedings Conference on Marine Engineering and its Application Vol 1 No 1 (2018): Conference on Marine Engineering and its Application
Publisher : Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cmea.v1i1.697

Abstract

This article mainly describes vibration on ship’s main engine foundation. The high amplitude of vibration could damage ship’s hull structure and disturb ship’s passenger. The amplitude can be reduced by avoiding resonance between natural frequency and exciting frequency. Thereby in this article, the domain frequency is identified from Bode Diagram-based vibration source. A modelling from vibration data used as a reference to analyze domain frequency from vibration source. In data modelling a method called ARMA is used to determine the best model from every nodes main engine foundations, and then the model is analyzed using Bode Diagram. The first point of Bode Diagram’s results shows natural frequency of main engine foundation in the amount of 402 rad/s, 1360 rad/s, and 4120 rad/s on phase 180°, The second point of Bode Diagram’s results shows natural frequency of main engine foundation in the amount of 15.8 rad/s, 561 rad/s, 1760 rad/s, and 4010 rad/s on phase 180°, The third point of Bode Diagram’s results shows natural frequency of main engine foundation in the amount of 2140 rad/s and 9840 rad/s on phase 180°, and the fourth point of Bode Diagram’s results shows natural frequency of main engine foundation in the amount of 8260 rad/s on phase 180°.
ANALISA TEGANGAN CHAIN LINE SINGLE POINT MOORING TYPE CATENARY ANCHOR LEG MOORING PADA AFRAMAX TANKER Nurhuda Yusuf; Wirawan Husodo Adi; Sumardiono Sumardiono
Proceedings Conference on Marine Engineering and its Application Vol 1 No 1 (2018): Conference on Marine Engineering and its Application
Publisher : Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cmea.v1i1.814

Abstract

One of the constraints that occur in the mooring system of SPM is the breaking of chain line caused by its inability to accept work load.In this problem, it is necessary to analize the tension line of SPM catenary anchor leg mooring (CALM) type on aframax tanker. The purpose of this research is to know the movement response of structure and the maximum tension chain line. The largest response amplitude operator (RAO) obtained when SPM moored on Aframax Tanker in the conditions of translational movement heave by 0.986 (m/m) on heading of 0° and 135 º. The largest response of the structure obtained when SPM moored on Aframax Tanker in the conditions of translational movement heave by 17.44 m²/(rad/s) on heading of 180 º. The greatest tension chain line is 2424873 N with the results of chain line tension still meets the safety factor in accordance with the standard API RP 2SK 2nd edition. The analysis results of chain line power structure is 155.42 MPa, if the dimension of chain line is reduced by 0,2 mm/year in a space of 13 year time then the stress obtained is 169,67 Mpa, and with estimation of 30 year time the value of stress obtained is 238,82 Mpa.
Co-Authors Abu Jamiin M. Kurnia Putra Iwan Nurhuda Yusuf Poernomo Heroe Samudra Budi Agung Sumardiono Sumardiono