Sugianto, Gibran Ivanka (2026) Analisis Kekuatan Konstruksi Crawler Crane Barge pada Kondisi Coupling Pitching dan Rolling Menggunakan Metode Elemen Hingga. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Crane barge merupakan salah satu jenis kapal kerja yang berperan penting dalam kegiatan konstruksi lepas pantai, khususnya pada operasi pengangkatan beban berat. Dalam penelitian ini dilakukan analisis kekuatan struktur geladak pada crane barge hasil konversi dari trimming barge dengan penambahan crawler crane reinforcement. Tujuan utama penelitian ini adalah untuk mengevaluasi respons struktur geladak terhadap kombinasi beban angkat (lifting load) dan beban lingkungan berupa gelombang laut, ditinjau dari tegangan von mises dan total deformation. Analisis struktur dilakukan menggunakan metode elemen hingga (Finite Element Method) dengan memodelkan struktur geladak pada rentang frame tertentu yang mengalami modifikasi signifikan akibat proses konversi. Variasi pembebanan yang dianalisis meliputi lifting load sebesar 100%, 80%, dan 50% dari kapasitas maksimum crane, dengan arah datang gelombang 135° dan 45° sebagai representasi kondisi coupling gerakan pitching dan rolling yang dominan. Selain itu, dilakukan variasi sudut putar (slewing angle) crane sebesar 0°, 45°, 90°, 135°, dan 180°, serta variasi tinggi gelombang dari kondisi normal hingga kondisi pushover. Hasil analisis menunjukkan bahwa konsentrasi tegangan von mises tertinggi secara konsisten terjadi pada area stopper crawler crane dan sambungan struktur di sekitarnya, yang berperan sebagai jalur utama aliran beban (load path). Pada kondisi lifting load 100% dengan arah datang gelombang 45°, tegangan maksimum pada kondisi gelombang tinggi mendekati bahkan melampaui tegangan izin material, sehingga kondisi tersebut dinilai kritis dan memerlukan pembatasan operasi. Sebaliknya, pada kondisi lifting load 80% dan 50%, seluruh nilai tegangan masih berada di bawah batas izin material, menunjukkan bahwa struktur masih aman secara kekuatan. Analisis total deformation menunjukkan bahwa peningkatan lifting load, tinggi gelombang, dan perubahan slewing angle berpengaruh terhadap besarnya deformasi global struktur geladak. Namun demikian, lokasi deformasi maksimum relatif konsisten dan tidak mengalami perubahan signifikan, yang menandakan perilaku struktur yang stabil. Secara keseluruhan, hasil penelitian ini menunjukkan bahwa struktur crane barge hasil konversi masih memenuhi kriteria kekuatan dan kekakuan untuk kondisi operasi tertentu, dengan perhatian khusus pada pengaturan sudut putar crane dan batasan operasi pada kondisi gelombang tinggi.
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A crane barge is a type of offshore working vessel that plays a crucial role in heavy lifting operations for marine construction activities. This study presents a structural strength analysis of a crane barge converted from a trimming barge with the addition of crawler crane reinforcement. The main objective of this research is to evaluate the structural response of the deck under combined lifting loads and environmental wave loads, assessed through von Mises stress and total deformation. The structural analysis was conducted using the Finite Element Method (FEM) by modeling the modified deck structure within selected frame regions that experience significant structural changes due to the conversion process. The analyzed loading conditions include lifting loads of 100%, 80%, and 50% of the crane’s maximum capacity, combined with wave directions of 135° and 45° to represent dominant coupling conditions of pitching and rolling motions. In addition, variations of crane slewing angles (0°, 45°, 90°, 135°, and 180°) and wave heights from normal to pushover conditions were considered. The results indicate that the highest von Mises stress consistently occurs in the crawler crane stopper area and its surrounding structural connections, which function as the primary load path for transferring lifting forces to the deck structure. Under the 100% lifting load condition with a 45° wave direction, the maximum stress at high wave conditions approaches and locally exceeds the allowable material stress, indicating a critical operational condition. In contrast, for the 80% and 50% lifting load cases, all stress values remain below the allowable limit, confirming that the structure is safe in terms of strength. The total deformation analysis shows that increasing lifting loads, wave heights, and crane slewing angles significantly affect the global deformation of the deck structure. However, the location of maximum deformation remains relatively consistent, indicating stable structural behavior under varying operational conditions. Overall, the study demonstrates that the converted crane barge structure satisfies strength and stiffness requirements for certain operating conditions, while emphasizing the importance of operational limitations and crane orientation control under severe wave conditions.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | crane barge, finite element method, lifting load, von mises stress, total deformation, gelombang laut, crane barge, finite element method, lifting load, von Mises stress, total deformation, wave loading. |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA347 Finite Element Method V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM156 Naval architecture V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM161 Ships--Hydrodynamics |
| Divisions: | Faculty of Marine Technology (MARTECH) > Naval Architecture and Shipbuilding Engineering > 36201-(S1) Undergraduate Thesis |
| Depositing User: | Gibran Ivanka Sugianto |
| Date Deposited: | 24 Jul 2026 07:56 |
| Last Modified: | 24 Jul 2026 07:56 |
| URI: | http://repository.its.ac.id/id/eprint/137172 |
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- Analisis Kekuatan Konstruksi Crawler Crane Barge pada Kondisi Coupling Pitching dan Rolling Menggunakan Metode Elemen Hingga. (deposited 24 Jul 2026 07:56) [Currently Displayed]
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