David Christian Uzia Gultom, . (2026) ANALISIS PENGARUH FREKUENSI ULTRASONIC ANTIFOULING SYSTEM TERHADAP RESPONS GETARAN PELAT GFRP DALAM PENGENDALIAN BIOFOULING. Skripsi thesis, Universitas Pembangunan Nasional Veteran Jakarta.
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Abstract
Biofouling on ship hulls causes increased hydrodynamic drag, leading to reduced fuel efficiency. The use of Ultrasonic Antifouling (UAF) is a promising alternative method. This study aims to analyze the effect of UAF frequency variations (20 kHz, 40 kHz, 60 kHz, 80 kHz, and 100 kHz) on the acoustic pressure distribution and wave attenuation characteristics of a Glass Fiber Reinforced Plastic (GFRP) plate under wet surface conditions. The analysis was conducted through Finite Element Analysis (FEA) using Abaqus software, considering the structural-acoustic interaction between the plate and the water medium along a 350 mm path. The simulation results showed that the maximum acoustic pressure occurred at 20 kHz (1,699.96 Pa) due to the system resonance phenomenon. It decreased at 40 kHz (122.9 Pa), increased again at 60 kHz (604.1 Pa) due to the emergence of higher-order harmonic vibration modes, and finally approached zero at 100 kHz (6.81×10⁻¹³ Pa), indicating a nodal point. Attenuation analysis proved that low-frequency waves (20-40 kHz) have a longer propagation range with a relatively gentle attenuation rate, while high frequencies (80-100 kHz) experience very rapid energy dissipation within short distances. Therefore, 20-40 kHz is recommended as the most effective frequency range for broader plate area coverage in ship biofouling control applications.
| Item Type: | Thesis (Skripsi) |
|---|---|
| Additional Information: | [No. Panggil: 2210313059] {Dosen Pembimbing: Amir Marasabessy] [Penguji 1: Sabila Fitri Afsari] [Penguji 2: Purwo Joko Suranto] |
| Uncontrolled Keywords: | Ultrasonic Antifouling, GFRP, Acoustic Pressure, Attenuation, Abaqus. |
| Subjects: | V Naval Science > V Naval Science (General) V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering |
| Divisions: | Fakultas Teknik > Program Studi Teknik Perkapalan (S1) |
| Depositing User: | DAVID CHRISTIAN UZIA GULTOM |
| Date Deposited: | 27 Aug 2026 03:02 |
| Last Modified: | 27 Aug 2026 03:02 |
| URI: | http://repository.upnvj.ac.id/id/eprint/53031 |
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