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All Journal International Journal of Natural Science and Engineering Wave: Jurnal Ilmiah Teknologi Maritim
Rosi Dwi Yulfani
Balai Teknologi Hidrodinamika BPPT
Computer Science & IT Earth & Planetary Sciences Engineering

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PENGARUH KONFIGURASI SUDUT SEBAR DAN PANJANG TALI TERHADAP KINERJA SISTEM TAMBAT KAPAL ISAP PRODUKSI TIMAH Arief Syarifuddin; Erdina Arianti; Rosi Dwi Yulfani; Fariz Maulana Noor; Anauta Lungiding Angga Risdianto; M Mustain
Wave: Jurnal Ilmiah Teknologi Maritim Vol. 15 No. 2 (2021)
Publisher : Badan Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/jurnalwave.v15i2.5090

Abstract

Kinerja sistem tambat Kapal Isap Produksi (KIP) timah sangat dipengaruhi oleh tension dari tali tambat dan offset yang dialami oleh struktur. Analisis pada sistem tambat untuk penelitian ini dilakukan dengan variasi sudut sebar tali tambat (30°, 45°, dan 60°) dan variasi panjang tali yaitu dengan diperpendek 0.2 m dan diperpanjang 0.2 m. Hasil yang diperoleh dari analisis yang dilakukan adalah respon gerak dari KIP timah dalam gerakan vertikal dan horizontal sudah cukup bagus. Variasi sudut sebar tali 30° menghasilkan tension maksimum paling baik, dengan tension maksimum sebesar 451.35 kN akibat arah pembebanan 90° di fairlead. Pada variasi panjang tali, adanya penambahan panjang 0.2 m, sudut sebar 30°, arah pembebanan 90° di fairlead merupakan yang terbaik dengan tension maksimum sebesar 449.30 kN. Tension maksimum yang dihasilkan masih dalam batas yang diijinkan API RP 2SK. Offset maksimum yang dihasilkan juga masih dalam batas aman yang diijinkan oleh API RP 16Q, dengan offset sumbu-x terbesar 0.228 m akibat arah pembebanan 135° dan sumbu-y sebesar 0.566 m akibat arah pembebanan 90°.
Strength Analysis and Assessment of Ina-TEWS Wave Glider Kusnindar Priohutomo; Wibowo Harso Nugroho; Rosi Dwi Yulfani
International Journal of Natural Science and Engineering Vol. 4 No. 3 (2020): October
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (381.64 KB) | DOI: 10.23887/ijnse.v4i3.29873

Abstract

Indonesia as a country that often experiences tsunami disasters needs to have an early warning system against tsunami disasters. This system can use various existing technologies, one of which is the tsunami buoy system. The new tsunami buoy system does not use the natural mooring system but uses the wave glider system. This paper discusses the structural strength of the surface floater of wave glider using Eva Foam and Fiberglass material for skin and Alluminium material for frame and kell. The surface floater using 16 pieces for frame and 1 piece for keel. Enviromental loads is use in this paper like hydrodynamics load and weight load. The results from this paper is material from Eva Foam has a maximum principle stress is 12693 Pa and shear stress is 6114.6 Pa. For material from Fiberglass has maximum principle stress is 11.875 Pa and shear stress is 6076.3 Pa. Safety factor (SF) from maximum principle stress and shear stress for Eva Foams is up to 6x and SF for maximum principle and shear stress for Fiberglass is up to 26x. Conclusions for this paper is the desain for surface floater of wave glider it can be operated in the sea with draugh 0.18 m.
Co-Authors Anauta Lungiding Angga Risdianto Arief Syarifuddin Erdina Arianti Fariz Maulana Noor Kusnindar Priohutomo M Mustain Wibowo Harso Nugroho