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All Journal Journal of Applied Civil Engineering and Infrastructure Technology (JACEIT) INJECTION: Indonesian Journal of Vocational Mechanical Engineering JURNAL FISIKA PAPUA
Windra Iswidodo
Institut Teknologi Sepuluh Nopember
Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Transportation

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Analysis of the Effect of Sound Dampening on Ship Engines Based on Tofu Dregs Composite Material (Glycine Max (L) Merill) Wijaya, Belqis Risky; Ilmah, Aurista Miftahatul; Risdianto, Anauta Lungiding Angga; Prasetyo, Taufan; Iswidodo, Windra; Sahari, Sahari
Jurnal Fisika Papua Vol. 3 No. 2 (2024): Jurnal Fisika Papua
Publisher : Universitas Cenderawasih

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31957/jfp.v3i2.197

Abstract

Noise in the engine room of a ship is a significant problem that can affect the health and comfort of crew members. This study aimed to evaluate the potential of tofu dregs as a sound insulation material in the form of a composite of carbon black and talak duco. The research method included making composite specimens with variations in composition, followed by testing the sound absorption coefficient using the impedance tube method. The results showed that the specimen with 30% tofu dregs, 45% carbon black, and 25% talak duco produced the highest sound absorption coefficient of 0.24. These findings show that tofu dregs have potential as an environmentally friendly and economical sound insulation material and can be used to reduce noise in ship engine rooms. This study contributes to the development of natural fiber-based insulation materials in the maritime industry.
Pembuatan Material Sandwich Panel Sebagai Pengganti Konstruksi Geladak Kapal Kayu di Wilayah Madura Iswidodo, Windra
Journal of Applied Civil Engineering and Infrastructure Technology Vol 3 No 2 (2022): Desember 2022
Publisher : Indonesian Society of Applied Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52158/jaceit.v3i2.409

Abstract

Sandwich panels are a combination of two wooden plates separated by a core. The benefits of using this specimen are still not maximized, only limited to non-structural use in the manufacture of wooden ships. The purpose of this study was to determine the characteristics of sandwich panel specimens using the casting method and the hand layup method. The results of the density test of the casting method have a better value with a value of 1.11 grams/cm³ while pure wood has a density value of 1.21 grams/cm³. The bending strength results from the hand layup method have a better value with a value of 1299.7 N/mm² while pure wood has a bending strength value of 619.7 N/mm². This study concludes that sandwich panel specimens can replace pure wood.
PENGEMBANGAN MESIN DOWEL 3 IN 1 PEMBUAT PASAK KAYU UNTUK PEMBANGUNAN PERAHU NELAYAN DI WILAYAH PESISIR MADURA Iswidodo, Windra; Fikri, Mohammad Anas; Permata, Tristiandinda; Abdullah, Mohammad
Injection: Indonesian Journal of Vocational Mechanical Engineering Vol 2 No 2 (2022)
Publisher : Pengelola Jurnal Politeknik Negeri Ketapang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58466/injection.v2i2.1481

Abstract

The coastal area of ​​Madura has many fishing boats or fishing vessels of various types and sizes. The construction of traditional ships is carried out by groups of workers or traditional shipyards which are not permanent, technological readiness is still minimal, and the workforce is very limited. Especially in traditional shipyards in the coastal area of ​​Madura or throughout Indonesia's coastal areas, which still rely on skills from generation to generation, so it is difficult to achieve the ship size desired by the customer, even the deviation of the size in tons can reach 25 percent. This situation shows the weakness of the technology applied in the traditional shipbuilding industry. Therefore, the technology of dowel making machine for making wooden dowels is carried out 3 in 1 with the function of shaving wood, cutting wood as desired and sharpening pegs or wood. All work is done in one machine which can be done automatically by setting the desired peg size and running with a microcontroller system. Tests have been carried out on a 3 in 1 dowel machine using 2 motors, the average time is equal to or more than 1 minute/1 piece of peg. Testing the tool using 1 motor obtained an average time of less than 30 seconds to produce 1 wooden peg.
Co-Authors Abdullah, Mohammad Aurista Miftahatul Ilmah Fikri, Mohammad Anas Permata, Tristiandinda Prasetyo, Taufan Risdianto, Anauta Lungiding Angga Sahari Sahari Wijaya, Belqis Risky