Analisis Hambatan dan Respons Gerak Platform Trimaran dengan Variasi Jarak Antar Lambung untuk Pembangkit Listrik Tenaga Arus Laut

Hartanto, Denny (2025) Analisis Hambatan dan Respons Gerak Platform Trimaran dengan Variasi Jarak Antar Lambung untuk Pembangkit Listrik Tenaga Arus Laut. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Sebagai negara kepulauan, Indonesia memiliki potensi besar dalam pengembangan Energi Baru Terbarukan (EBT) dari laut, salah satunya energi hidrokinetik dari arus laut. Dalam Tugas Akhir ini, dilakukan analisis terhadap platform pembangkit listrik tenaga arus laut menggunakan konfigurasi trimaran yang ditambatkan dengan sistem mooring tipe catenary. Trimaran dilengkapi dua turbin vertikal berkapasitas masing-masing 50 kW dan dirancang untuk beroperasi pada kecepatan arus 1,3 m/s. Fokus analisis meliputi gaya hambatan, respons gerak (surge, sway, heave, roll, pitch, yaw), serta gaya tegangan mooring line. Hasil analisis menunjukkan bahwa hambatan total pada ketiga konfigurasi platform berada pada kisaran 55–56 kN, dengan gaya terkecil pada platform B sebesar 55,45 kN. Pelebaran jarak antar lambung hanya memberikan pengaruh kecil terhadap pengurangan gaya hambatan. Pada analisis gerak, platform C menunjukkan nilai surge dan heave terkecil, masing-masing 4,66 m dan 0,36 m, sementara gerak pitch terkecil ditemukan pada platform A dan B sebesar 0,67°. Analisis tegangan mooring line menunjukkan bahwa pelebaran jarak antar lambung memberikan pengaruh kecil terhadap gaya tegangan pada sumbu X (58–59 kN) dan sumbu Z (±15 kN), dengan tegangan terkecil pada platform B. Hasil ini menunjukkan bahwa desain platform B memberikan kinerja terbaik secara keseluruhan dalam menghadapi beban lingkungan.
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As an archipelagic country, Indonesia holds great potential in developing renewable energy from the ocean, particularly hydrokinetic energy generated from ocean currents flowing through straits between islands. This Final Project analyzes a marine current power generation platform using a trimaran configuration. The trimaran is anchored using catenary-type mooring lines at each bow and stern end and is equipped with two vertical-axis turbines, each with a capacity of 50 kW, operating optimally at a current speed of 1.3 m/s. The study focuses on analyzing drag forces, platform motion responses (surge, sway, heave, roll, pitch, yaw), and mooring line tension forces.The results show that total drag force across the three platform configurations ranges between 55–56 kN, with the lowest drag observed in Platform B at 55.45 kN. Increasing the hull spacing only has a minor effect on reducing drag. For motion response, surge and heave displacements decrease as hull spacing increases, with Platform C showing the smallest values: 4.66 m for surge and 0.36 m for heave. However, pitch motion is only slightly affected, with the lowest pitch of 0.67° found in both Platform A and B. Mooring line tension forces also show minimal variation, ranging from 58–59 kN in the X-axis and around 15 kN in the Z-axis, with Platform B recording the lowest tension in both directions. These results indicate that Platform B demonstrates the most balanced and stable performance under environmental loading.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Trimaran, Hambatan, Respons Gerak, Trimaran, Resistance, Motion Response
Subjects:	V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM161 Ships--Hydrodynamics
Divisions:	Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis
Depositing User:	Denny Hartanto
Date Deposited:	17 Jul 2025 09:15
Last Modified:	17 Jul 2025 09:15
URI:	http://repository.its.ac.id/id/eprint/119934

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