Analisis Pengikatan Dan Gerakan Pada Dok Apung Akibat Gaya Luar Dengan Variasi Desain Pengikatan Di Perairan Dangkal Terbuka

Charizzaka, Ahmad (2016) Analisis Pengikatan Dan Gerakan Pada Dok Apung Akibat Gaya Luar Dengan Variasi Desain Pengikatan Di Perairan Dangkal Terbuka. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Perkembangan maritim tidak lepas dari kapal sebagai sarana transportasi. Hal itu menyebabkan kebutuhan akan dok sebagai tempat pembuatan dan reparasi kapal semakin meningkat. Semakin mahalnya harga lahan dan berbagai kelebihan yang ditawarkan membuat dok apung kian diminati sebagai solusi. Dok apung sendiri sebagai suatu struktur apung tidak lepas dari pengaruh gaya luar seperti gelombang, angin, dan arus. Tugas akhir ini bermaksud untuk melakukan analisis terhadap respon gerakan dok apung akibat gaya luar, tegangan yang terjadi pada rantai pengikatan, serta tingkat kenyamanan dari dok apung itu sendiri. Analisa dilakukan dengan pemodelan secara numerik menggunakan perangkat lunak Maxsurf dan Ansys Aqwa. Pada penelitian ini, dilakukan percobaan terhadap 3 kondisi dok apung yakni saat kosong, saat kapal naik dok, dan saat kondisi balas penuh, serta dengan 3 variasi sudut datang gelombang yakni 0⁰, 45⁰ dan 90⁰. Juga divariasikan konfigurasi pengikatan dok apung yakni menyilang dan menyebar. Setelah dilakukan analisis disimpulkan bahwa nilai tegangan rantai pada kondisi kosong dan kapal naik dok berada di bawah batas breaking load, sedangkan pada kondisi balas penuh tegangan yang terjadi melebihi batas breaking load baik pada desain pengikatan menyebar maupun pengikatan menyilang.Pengikatan menyilang memiliki nilai tegangan maksimum yang lebih besar dibandingkan dengan pengikatan menyebar. Tingkat ketidaknyamanan (Motion Sickness Incidence) gerakan dok apung adalah not uncomfortable atau dapat dikatakan nyaman dengan percepatan heave 0.208 m/s2 . Serta gerakan dok apung yang masih memenuhi kriteria dari biro klasifikasi. ================================================================================================== Maritime development can not be separated from the ships as a means of transportation. That caused the need for the dock as the place of manufacture and ship repair is increasing. Increasingly high price of land and the various advantages offered to make floating dock increasingly popular as a solution. Floating dock itself as a floating structure can not be separated from the influence of external forces such as waves, winds and currents. This final project intends to conduct an analysis of movement responses floating dock due to external forces, the tension that occurs in the binding chains, and the comfort level of the floating dock itself. The Analysis was done by using a numerical modeling software Ansys Aqwa and Maxsurf. In this study, conducted experiments on three conditions of floating dock which is empty condition, ship-docked, and full-ballst condition as well as with third variation of the angle of attack 0⁰, 45⁰ and 90⁰. Also varied configuration of the floating dock mooring layout crosswise and spread. After analysis, it was concluded that the chain tension in a empty dock condition and docked ship condition below the limit breaking load, whereas in full-ballast conditions the mooring tension beyond the limit breaking load both on the spread mooring and cross mooring design. Cross desaign have a maximum tesion value greater than the spread mooring. The level of discomfort (Motion Sickness Incidence) movement floating dock is not uncomfortable or can be said to be comfortable with a heave acceleration of 0,208 m/s2. As well as the movement of floating dock that still meets the criteria of classification bureau.

Item Type: Thesis (Undergraduate)
Additional Information: RSPe 623.83 Cha a-1 3100017069241
Uncontrolled Keywords: Dok Apung, Motion Sickness Incidence, Respon Gerakan, Konfigurasi Pengikatan, Tegangan Rantai Pengikatan, Floating Dock, Motion Sickness Incidence, Response Motions, Mooring Configuration, Mooring Tension.
Subjects: V Naval Science > V Naval Science (General) > V220 Naval ports, bases, reservations, docks, etc.
Divisions: Faculty of Marine Technology (MARTECH) > Naval Architecture and Shipbuilding Engineering > 36202-(S1) Undergraduate Thesis
Depositing User: - Davi Wah
Date Deposited: 19 Feb 2020 16:37
Last Modified: 19 Feb 2020 16:37
URI: http://repository.its.ac.id/id/eprint/74907

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