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All Journal Wave: Jurnal Ilmiah Teknologi Maritim Sewagati
Rizky Chandra Ariesta
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Arts Humanities Computer Science & IT Earth & Planetary Sciences Education Engineering Languange, Linguistic, Communication & Media Public Health Social Sciences Other

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IDENTIFIKASI KERUSAKAN PADA PELAT SANDWICH LAMBUNG SISI MENGGUNAKAN METODE ELEMEN HINGGA Rizky Chandra Ariesta; Achmad Zubaydi; Abdi Ismail; Tuswan
Wave: Jurnal Ilmiah Teknologi Maritim Vol. 14 No. 2 (2020)
Publisher : Badan Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/jurnalwave.v14i2.4727

Abstract

Pelat sandwich merupakan material baru yang tersusun atas material kulit dan material inti yang dapat digunakan untuk menggantikan pelat konvensional pada konstruksi kapal. Penggunaan material ini memiliki kelebihan dengan mengurangi berat sehingga dapat memungkinkan menambah muatan pada kapal. Dalam penerapan pelat sandwich diperlukan sistem untuk menentukan kerusakan pada strukturnya. Pada penelitian ini dikembangkan metode identifikasi kerusakan secara menyeluruh berdasarkan respon getaran. Kerusakan diidentifikasi dengan analisis getaran menggunakan metode elemen hingga (FEM). Variabel identifikasi berdasarkan besar volume kerusakan material inti. Analisis dilakukan pada pelat sandwich lambung kapal tanker dengan kekuatan yang telah memenuhi standard kelas Llyoid Register (LR). Pelat sandwich dimodelkan dengan kondisi batas dijepit kedua sisi untuk mendekati model sesungguhnya. Parameter penentuan besar kerusakan diperoleh dari perubahan frekuensi alami pada pelat. Penurunan frekuensi alami menunjukkan adanya kerusakan pada material inti sandwich.
Inovasi Pengembangan Alat Roasting Kopi Berbasis Mekanis Dan Monitoring: - Rizky Chandra Ariesta; Mohammad Nurul Misbah; Naila Maharani Vianahar; Ahmat Safa’at; Achmad Zubaydi; Windha Umi Alifia; Adi Novitarini Putri; Dony Setyawan; Septia Hardy Sujiatanti; Teguh Putranto; Kevinaura Rachman Daudy
Sewagati Vol 10 No 4 (2026)
Publisher : Pusat Publikasi ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j26139960.v10i4.9535

Abstract

The national coffee sector, despite its position as a global producer, still faces substantial challenges at the Micro, Small, and Medium Enterprises (MSME) level, particularly in terms of product quality consistency and added value. In Singosari District, Malang Regency, the main obstacle identified is the traditional and non-standardized roasting practices, resulting in quality fluctuations and difficulties in penetrating the premium market. In addition, access to modern roasting equipment, which is costly, is a significant financial barrier for small-scale MSMEs. This community service activity responds to these needs through comprehensive interventions: the development of innovative coffee roasting equipment based on a simple mechanical monitor and the implementation of a structured education program. The innovative equipment is designed with a compact integrated layout, featuring optimal space efficiency, and uses borosilicate glass as the roasting chamber for visual transparency and stable process monitoring. In addition to equipment assistance, theoretical and practical workshops are held to improve participants' understanding of roasting parameters (temperature, time, crack). The expected outcome is to trigger production independence through the use of affordable, appropriate technology.
Co-Authors Achmad Zubaydi Adi Novitarini Putri Ahmat Safa’at Dony Setyawan Ismail, Abdi Kevinaura Rachman Daudy Mohammad Nurul Misbah Naila Maharani Vianahar Septia Hardy Sujiatanti Teguh Putranto Tuswan Windha Umi Alifia