Studi Numerik Dan Monitoring Kekuatan Struktur Pada Kapal Penyeberangan Surabaya-Madura

Dumadi, Pinandita Agung (2025) Studi Numerik Dan Monitoring Kekuatan Struktur Pada Kapal Penyeberangan Surabaya-Madura. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Penelitian ini bertujuan untuk mengevaluasi kekuatan struktur geladak kapal RoRo penyeberangan Surabaya–Madura melalui pemantauan tegangan secara langsung dengan menggunakan strain gauge dan validasi hasilnya melalui analisis numerik berbasis metode elemen hingga. Pengukuran dilakukan dengan memasang strain gauge pada titik-titik strategis geladak kapal dalam tiga arah utama untuk merekam respons struktur akibat variasi beban kendaraan dan kondisi laut. Data regangan yang diperoleh dikonversi menjadi tegangan dengan memanfaatkan hubungan tegangan-regangan, kemudian dianalisis menggunakan Lingkaran Mohr untuk memperoleh tegangan utama. Analisis domain frekuensi dengan Fast Fourier Transform (FFT) digunakan untuk mengidentifikasi karakteristik frekuensi dominan getaran struktural.Selain itu, pemodelan numerik geladak kapal dilakukan menggunakan perangkat lunak ANSYS untuk menentukan distribusi tegangan dan dibandingkan dengan hasil pengukuran eksperimental. Hasil penelitian menunjukkan tegangan maksimum yang terukur masih berada di bawah batas tegangan izin material, mengindikasikan bahwa struktur geladak dalam kondisi aman untuk dioperasikan. Dominasi frekuensi getaran yang teridentifikasi juga berada dalam rentang yang wajar, tidak menimbulkan resonansi yang membahayakan. Temuan ini memperlihatkan bahwa sistem monitoring yang diterapkan efektif untuk memetakan kondisi aktual tegangan pada geladak kapal, sehingga dapat menjadi dasar pertimbangan dalam perencanaan perawatan maupun inspeksi berkala guna memastikan keselamatan pelayaran.
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This study aims to evaluate the structural strength of the RoRo deck operating on the Surabaya–Madura route through direct stress monitoring using strain gauges, and to validate the findings by means of numerical analysis based on the finite element method. Measurements were conducted by installing strain gauges at strategic points on the ship’s deck in three principal directions to capture the structural response under varying vehicle loads and sea conditions. The obtained strain data were converted into stress using the stress-strain relationship, and further analyzed using Mohr’s Circle to determine the principal stresses. A frequency domain analysis employing the Fast Fourier Transform (FFT) was also carried out to identify the dominant vibration frequencies of the structure. Additionally, numerical modeling of the ship deck was performed using ANSYS software to determine the stress distribution, which was then compared with the experimental measurements. The results indicate that the maximum measured stress remains below the allowable material stress limit, suggesting that the deck structure is in a safe operational condition. The identified dominant vibration frequencies were also found to be within a reasonable range, posing no harmful resonance risks. These findings demonstrate that the implemented monitoring system is effective in mapping the actual stress conditions on the ship’s deck, thus providing a sound basis for planning maintenance and periodic inspections to ensure navigation safety.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Strain Gauge, Stress, Ferry Ro-Ro, Struktur Geladak, Monitoring tegangan struktur Strain Gauge, Stress, Ferry Ro-Ro, Structural Deck, Structural Stress Monitoring
Subjects:	V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM156 Naval architecture V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM381 Passenger ships
Divisions:	Faculty of Marine Technology (MARTECH) > Naval Architecture and Shipbuilding Engineering > 36201-(S1) Undergraduate Thesis
Depositing User:	Pinandita Agung Dumadi
Date Deposited:	05 Aug 2025 03:34
Last Modified:	05 Aug 2025 03:34
URI:	http://repository.its.ac.id/id/eprint/127169

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