Studi Eksperimental Gerakan Heave SPAR Platfrom Menggunakan Tuned Mass Damper Dengan Variasi Massa

Wibowo, Hanif (2026) Studi Eksperimental Gerakan Heave SPAR Platfrom Menggunakan Tuned Mass Damper Dengan Variasi Massa. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Platform SPAR merupakan salah satu struktur terapung yang banyak digunakan pada perairan dalam, namun memiliki kerentanan terhadap respons gerak heave akibat eksitasi gelombang, terutama pada frekuensi mendekati resonansi. Penelitian ini bertujuan menganalisis pengaruh penerapan Tuned Mass Damper (TMD) terhadap reduksi respons heave model SPAR, dengan fokus pada variasi massa TMD. Metode penelitian yang digunakan adalah eksperimen skala laboratorium pada kondisi gelombang terkontrol menggunakan spektrum JONSWAP dengan tinggi gelombang signifikan = 2.5 m, periode puncak = 7.5 s, dan faktor puncak = 2.8 pada skala penuh. Pengujian dilakukan pada model SPAR skala 1:25 di fasilitas flume tank MOB BRIN dengan tiga konfigurasi: tanpa TMD (M0K0), TMD dengan massa M1 (M1K1), dan TMD dengan massa M2 (M2K1). Respons heave dianalisis dalam domain frekuensi menggunakan metode Fast Fourier Transform (FFT) dengan smoothing Hamming window. Hasil penelitian menunjukkan bahwa pemasangan TMD mampu mereduksi respons heave, dengan konfigurasi M1K1 menghasilkan reduksi amplitudo heave signifikan sebesar 3.16% terhadap konfigurasi tanpa TMD. Konfigurasi M2K1 menghasilkan reduksi yang lebih tinggi yaitu 4.98%. Peningkatan massa pegas TMD dari M1 ke M2 menyebabkan peningkatan efektivitas TMD sebesar 1.82%, yang disebabkan oleh kontribusi rasio massa yang lebih dominan terhadap efektivitas sistem peredam dibandingkan perubahan posisi puncak respons.
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The SPAR platform is one of the most widely used floating structures for deep-water applications. However, it is susceptible to heave motion induced by wave excitation, particularly at frequencies close to resonance. This study aims to investigate the effect of implementing a Tuned Mass Damper (TMD) on reducing the heave response of a SPAR model, with a particular focus on the influence of TMD mass variation. An experimental laboratory-scale approach was employed under controlled wave conditions using the JONSWAP wave spectrum with a significant wave height (Hs) of 2.5 m, a peak period (Tp) of 7.5 s, and a peak enhancement factor (γ) of 2.8 at full scale. The experiments were conducted on a 1:25 scale SPAR model in the Maneuvering and Ocean Engineering Basin (MOB), National Research and Innovation Agency (BRIN), using three configurations: without TMD (M0K0), TMD with mass M1 (M1K1), and TMD with mass M2 (M2K1). The heave response was analyzed in the frequency domain using the Fast Fourier Transform (FFT) method with Hamming window smoothing. The results demonstrate that the installation of the TMD effectively reduced the heave response. The M1K1 configuration achieved a maximum heave amplitude reduction of 3.16% compared to the configuration without TMD, while the M2K1 configuration provided a higher reduction of 4.98%. Increasing the TMD mass from M1 to M2 improved the damping effectiveness by 1.82%, indicating that the mass ratio has a more dominant influence on the TMD performance than the shift in the response peak frequency.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	SPAR, Tuned Mass Damper, Variasi massa, Heave, RAO, Eksperimen.SPAR, Heave, Tuned Mass Damper, Mass Variations, Rao, Experiment
Subjects:	Q Science > QA Mathematics > QA273.6 Weibull distribution. Logistic distribution. T Technology > TC Hydraulic engineering. Ocean engineering > TC147 Ocean wave power. T Technology > TC Hydraulic engineering. Ocean engineering > TC1680 Offshore structures
Divisions:	Faculty of Marine Technology (MARTECH) > Offshore Engineering > 54040-(S1) Undergraduate Thesis
Depositing User:	Hanif Wibowo
Date Deposited:	30 Jul 2026 01:08
Last Modified:	30 Jul 2026 01:08
URI:	http://repository.its.ac.id/id/eprint/139881

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