Pengembangan Digital Twin Geladak Kapal Roro Berbasis Data Strain Gauge Untuk Visualisasi Distribusi Tegangan

Tumanggor, Bryan Cornelius (2026) Pengembangan Digital Twin Geladak Kapal Roro Berbasis Data Strain Gauge Untuk Visualisasi Distribusi Tegangan. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Geladak kendaraan kapal Ro-Ro menerima beban operasional yang besar dan bervariasi sehingga kondisi strukturnya perlu dipantau. Hasil pengukuran regangan umumnya disajikan sebagai data numerik atau grafik, sehingga distribusi tegangan secara spasial sulit diinterpretasikan. Penelitian ini bertujuan mengembangkan dashboard berbasis web sebagai media monitoring hasil digital twin, memvisualisasikan model digital twin tiga dimensi geladak kapal Ro-Ro, serta menampilkan distribusi tegangan dalam bentuk heatmap tiga dimensi yang divalidasi terhadap alat P3 Strain Indicator. Sistem akuisisi data dibangun menggunakan empat sensor BF350-3AA dalam konfigurasi full Wheatstone bridge, modul ADS1232 24-bit, dan mikrokontroler ESP32. Data dikirimkan melalui protokol MQTT menuju dashboard berbasis Three.js, dikonversi menjadi tegangan menggunakan Hukum Hooke (E = 200.000 MPa), lalu diinterpolasi dengan metode Inverse Distance Weighting. Validasi dilakukan pada prototipe barge terhadap alat P3 Strain Indicator pada tiga kondisi pembebanan, sedangkan visualisasi geladak kapal Ro-Ro menggunakan hasil pengukuran langsung pada tiga titik di geladak kendaraan. Hasil validasi menunjukkan simpangan absolut 0,083 sampai 1,144 mikrostrain dengan error relatif rata-rata 2,85%, memenuhi batas akurasi ±5 mikrostrain yang disyaratkan ABS (2015). Visualisasi menghasilkan rentang tegangan 5,26 sampai 47,74 MPa, dengan nilai maksimum tercatat pada titik T2 (midship) setara 20,32% tegangan luluh baja S235. Digital twin yang dikembangkan karena itu mampu merepresentasikan distribusi tegangan geladak kapal Ro-Ro secara visual dengan akurasi yang memenuhi kriteria, sehingga layak digunakan sebagai alat bantu monitoring kondisi struktur kapal.
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The vehicle deck of a Ro-Ro ship carries large and highly variable operational loads, so its structural condition needs to be monitored. Strain measurements are commonly presented as numerical data or graphs, which makes the spatial distribution of stress difficult to interpret. This study aims to develop a web-based dashboard as a monitoring medium for digital twin output, to visualize a three-dimensional digital twin model of a Ro-Ro ship deck, and to present the stress distribution as a three-dimensional heatmap validated against a P3 Strain Indicator. The acquisition system used four BF350-3AA sensors in a full Wheatstone bridge configuration, a 24-bit ADS1232 module, and an ESP32 microcontroller. Data were transmitted through the MQTT protocol to a Three.js dashboard, converted into stress using Hooke's law (E = 200,000 MPa), and interpolated using Inverse Distance Weighting. Validation was performed on the barge prototype using the P3 Strain Indicator under three loading conditions. Meanwhile, visualization of the Ro-Ro ship’s deck used direct measurements taken at three points on the vehicle deck. The validation results showed absolute deviations ranging from 0.083 to 1.144 microstrain with an average relative error of 2.85%, meeting the ±5 microstrain accuracy limit required by ABS (2015). Visualization revealed a stress range of 5.26 to 47.74 MPa, with the maximum value recorded at point T2 (midship), equivalent to 20.32% of the yield strength of S235 steel. The developed digital twin is therefore capable of representing the stress distribution of a Ro-Ro ship deck visually with an accuracy that meets the applicable criteria, making it suitable as a supporting tool for ship structural monitoring.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Digital Twin, Geladak Kapal Ro-Ro, Strain Gauge, Distribusi Tegangan, Validasi. Digital Twin, Ro-Ro Ship Deck, Strain Gauge, Stress Distribution, Validation.
Subjects:	V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM163 Hulls (Naval architecture) V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM293 Shipping--Indonesia--Safety measures V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM471 Ships--Electric equipment
Divisions:	Faculty of Marine Technology (MARTECH) > Naval Architecture and Shipbuilding Engineering > 36201-(S1) Undergraduate Thesis
Depositing User:	Bryan Cornelius Tumanggor
Date Deposited:	07 Aug 2026 02:20
Last Modified:	07 Aug 2026 02:20
URI:	http://repository.its.ac.id/id/eprint/144063

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