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Sunarso Sugeng
Department of Industrial Technology, Vocational School, Diponegoro University
Engineering

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Noise Level Analysis of KM. Sabuk Nusantara 71 to Increase Ship Passengers Comfort Based on BKI Rules Sunarso Sugeng; Mohammad Ridwan; Sulaiman Sulaiman; Samuel Febriary Khristyson
TEKNIK Vol 42, No 2 (2021)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v42i2.37441

Abstract

Noise is an unwanted sound or sound source which can distract or harm human health and comfort. According to experts, a sound that exceeds the level of human listening senses can cause deafness. Such danger can also be found in ships. An alternative to reduce noise in ships is by modifying the construction.  This research aims to compare noising before and after adding a side deck girder in the engine room of a 2000 DWT ship. The result showed that in the engine room, after adding a FB 180 x 8 mm FP 75 x 10 mm sized T profile, for 0-30 seconds intervals, the maximum noise was down from 127 dB to 62 dB or a 0.47% decrease. Meanwhile, the maximum noise was down from 98.6 dB to 57 dB in the accommodation room or decreased by 0.41%. The maximum noise was down from 83 dB to 37 dB or a 0.56% decrease in the navigation room. Such modification had reduced the average noise range from 80-40 dB to 55-20 dB.
Technical and Economic Analysis of Ship Launching with Slipway and Airbag KM. Sabuk Nusantara 72 in PT. Janata Marina Indah Shipyard Semarang Sunarso Sugeng; Mohammad Ridwan; Suharto Suharto; Samuel Febriary Khristyson
TEKNIK Vol 41, No 3 (2020)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v41i3.33710

Abstract

In a ship planning can not be separated from the planning of the ship launching process. A ship can glide perfectly if it has a high enough planning time and costs. The launch process itself is divided into several ways. The choice of this method needs to be considered because it relates to the budget and preparations made. The method used is the calculation according to the numerical approach assisted by computational software. In the first calculation it is planned with the slipway launch, and then the next one is planned with the airbags that have been implemented previously. The purpose of this study is to provide analysis results as a consideration in implementing the slipway and airbag ship launching method on KM ships. Belt Nusantara 72 measuring 2000 DWT. In steps 5 to 6, both the slipway and the airbags experience a stern lift condition with a value (yVd) of 1396.97 ton.  Based on the economic analysis of the hours of people using airbags, there is a decrease in working hours by 44% when compared to the launch using a slipway. This also happened to work productivity where it was 84% more time effective. When viewed from an investment point of view, the use of slipways is actually more economical than airbag, the difference is 43% more economical using slipways. Both types of launch can be applied by looking at the economical side and the ability of each shipyard in carrying out the launching process and seeing the main size of the ship to be launched.
Co-Authors Mohammad Ridwan Samuel Febriary Khristyson Samuel Febriary Khristyson Suharto Suharto Sulaiman Sulaiman