Panambang, Adityo Arkananta (2020) Analisis Respon Dinamis Pada Struktur Jacket Fixed Platform Akibat Pengaruh Scouring. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Keamanan, fungsi dan ketahanan sebuah anjungan lepas pantai mempengaruhi kinerja struktur tersebut dalam proses pengelolaan minyak dan gas. Salah satu masalah yang dapat mempengaruhi ketahanan anjungan pantai adalah scouring. Banyak struktur lepas pantai terpancang yang mengalami keruntuhan akibat scouring yang sangat ekstrim yang terletak di bagian pondasinya Oleh karena itu, analisis respon dinamis perlu dilakukan untuk mengetahui ketahanan, keselamatan dan kinerja jacket platform terhadap pembebanan dengan analisa berbasis time-domain setelah terjadi scouring. Analisa repon dinamis struktur yang akan ditinjau adalah nilai base shear pada struktur, lalu dilanjutkan dengan besar unity check yang terjadi pada beberapa member penting setelah mendapat pengaruh dari beban gelombang operasional. Hasil yang didapatkan menunjukan bahwa struktur benar mengalami perubahan yang cukup signifikan. Untuk perubahan periode natural dan Dynamic Amplification Factor memiliki perubahan yang cukup signifikan dan membentuk kurva eksponensial. Untuk perubahan base shear paling signifikan terjadi pada saat struktur yang terkena pengaruh beban gelombang arah 30°, 60°, 210° dan 240° membentuk kurva eksponensial. Kemudian, perubahan unity check terjadi secara signifikan pada member 110-203L yang merupakan member diagonal bracing. Dapat disimpulkan bahwa penambahan kedalaman scouring akan memberikan pengaruh yang cukup besar pada struktur.
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Scour affects safety, function, and durability of an offshore structure’s performance in the oil and gas management process. The problems that affect offshore platform capacity is scouring phenomenon. Many offshore structures have collapsed due to extreme scouring that located at the foundation. Therefore, the dynamic analysis response is used to determine the durability, safety, and performance of the platform due to scouring with a time-domain approach. The dynamic response that will be reviewed is base shear, then continue with the value of unity check that occurs on several important members that are affected by operational wave loads. The results show that the structure underwent a significant change in the variations of scouring Natural period and dynamic amplification factor significantly changes and make exponential curves. The highest base shear significantly occurs when the structure affected by wave loads towards 30°, 60°, 210° and 240° and make exponential curves. Then, the unity check occurs significantly at member 110-203L which a diagonal member bracing. It can be concluded that the depth of scouring will give a large effect on the structure.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | respon dinamis, scouring, time domain, periode natural, base shear, unity check dynamic response, scouring, time domain, natural period, base shear, unity check |
| Subjects: | 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) > Ocean Engineering > 38201-(S1) Undergraduate Thesis |
| Depositing User: | Adityo Arkananta Panambang |
| Date Deposited: | 14 Aug 2020 08:36 |
| Last Modified: | 16 Jun 2023 07:38 |
| URI: | http://repository.its.ac.id/id/eprint/78221 |
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