Analisis Respon Dinamis Struktur Penopang Turbin Angin Terapung Dengan Metode Elemen Hingga: Studi Kasus Laut Banda

Umar, Abdullah (2026) Analisis Respon Dinamis Struktur Penopang Turbin Angin Terapung Dengan Metode Elemen Hingga: Studi Kasus Laut Banda. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pengembangan turbin angin lepas pantai terapung menjadi solusi strategis untuk memanfaatkan potensi angin di perairan dalam, seperti Laut Banda di utara Pulau Wetar dengan kedalaman sekitar 200 meter. Penelitian ini mengevaluasi karakteristik dinamis turbin angin NREL 5 MW yang dikombinasikan dengan tiga tipe struktur terapung, yaitu semisubmersible, spar, dan tension leg platform (TLP), melalui analisis periode natural pada kondisi terapung bebas, respons gerak enam derajat kebebasan pada kondisi tertambat, serta tegangan tali tambat pada kondisi operasi dan kondisi ekstrem. Hasil penelitian menunjukkan bahwa pada kondisi terapung bebas, struktur spar memiliki periode natural heave, roll, dan pitch yang paling jauh dari periode gelombang dominan di Laut Banda. Pada kondisi tertambat, TLP paling efektif mereduksi gerakan heave dan pitch, spar menunjukkan stabilitas global yang baik, sedangkan semisubmersible memperlihatkan respons yang lebih moderat pada sebagian besar derajat kebebasan. Tegangan maksimum tali tambat terjadi pada mooring lines yang sejajar dengan arah datang beban lingkungan. Sementara itu, Mooring Utilization Factor pada mooring lines struktur semisubmersible dan spar lebih rendah dibandingkan TLP yang memiliki tingkat utilisasi relatif tinggi pada seluruh mooring lines. Berdasarkan evaluasi menggunakan metode Analytical Hierarchy Process (AHP), semisubmersible memperoleh skor tertinggi sebesar 0,7861 dan menjadi alternatif yang paling sesuai untuk kondisi Laut Banda, diikuti oleh spar dengan skor 0,650 dan TLP dengan skor 0,634. Penelitian ini memberikan dasar kuantitatif dalam pemilihan struktur terapung untuk pengembangan turbin angin lepas pantai di perairan dalam Indonesia.
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The development of floating offshore wind turbines offers a strategic solution for harnessing wind energy potential in deep-water regions, such as the Banda Sea north of Wetar Island, with water depths of approximately 200 meters. This study evaluates the dynamic characteristics of the NREL 5 MW wind turbine combined with three floating support structures, namely the semisubmersible, spar, and tension leg platform (TLP). The evaluation includes natural period analysis under free-floating conditions, six-degree-of-freedom motion responses under moored conditions, and mooring line tension under both operational and extreme environmental conditions. The results indicate that under free-floating conditions, the spar exhibits heave, roll, and pitch natural periods that are furthest from the dominant wave period in the Banda Sea. Under moored conditions, the TLP is the most effective in reducing heave and pitch motions, the spar demonstrates good overall stability, and the semisubmersible exhibits more moderate responses across most degrees of freedom. Maximum mooring line tension occurs in the lines aligned with the direction of environmental loading. Meanwhile, the Mooring Utilization Factor of the semisubmersible and spar mooring lines is lower than that of the TLP, which exhibits relatively high utilization across all mooring lines. Based on the Analytical Hierarchy Process (AHP) evaluation, the semisubmersible achieved the highest score of 0.7861 and was identified as the most suitable floating structure for the Banda Sea conditions, followed by the spar with a score of 0.650 and the TLP with a score of 0.634. This study provides a quantitative basis for selecting floating support structures for offshore wind turbine development in the deep waters of Indonesia.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Turbin angin terapung, Semisubmersible, SPAR, TLP, Laut Banda, Floating Wind Turbine, Semisubmersible, SPAR, TLP
Subjects:	V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM740 Marine turbines
Divisions:	Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis
Depositing User:	Abdullah Umar
Date Deposited:	13 Jul 2026 08:45
Last Modified:	13 Jul 2026 08:45
URI:	http://repository.its.ac.id/id/eprint/134752

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