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"A method, called spectral response surface method, is proposed for the study of the ringing phenomenon of offshore structures. Newman?s results for diffraction force on a column were reformulated in terms of the frequency components of the ocean surface and their Hilbert transforms. Using a first-order reliability method together with a dynamic model for the structural response, it is straightforward to calculate the ocean surface history most likely to generate an extreme ringing response and the ringing response history. "

"This book provides a brief overview of passive, semi-active and active control schemes to deal with vibration of offshore platforms. It then comprehensively and systematically discusses the recent advances in active systems with optimal, sliding model, delayed feedback and network-based control. Intended for readers interested in vibration control and ocean engineering, it is particularly useful for researchers, engineers, and graduate students in the fields of system and control community, vibration control, ocean engineering, as well as electrical and electronic engineering."

"Studi analisis ini merupakan suatu kegiatan untuk menganalisis dan menghitung kekuatan struktur bangunan dan besar beban ekternal dari lingkungan untuk menghindari terjadinya fatigue failure pada perencanaan dan perancangan Bangunan Offshore Aquaculture agar mendapatkan hasil yang optimal serta bangunan dapat bertahan dalam kurun waktu lifetime design. Guna mencapai tujuan yang dimaksud, harus dilakukan analisis terhadap pembebanan pada struktur Offshore Aquaculture sendiri, yaitu beban angin, beban arus, beban ombak dan gaya tegangan tali pada mooring yang diderita Offshore Aquaculture dalam keadaan kondisi di tempat operasional, sehingga dari nilai stress yang didapatkan dari hasil analisis secara numerik, akan didapatkan nilai Fatigue Life untuk keseluruhan struktur. Adapun hasil analisis ini menyatakan bahwa pada saat keadaan badai, gaya total yang bekerja pada struktur adalah 10508.16 kN, tegangan total mooring lines pada struktur yaitu 122.21 kN, dan kekuatan tegangan struktur yang didapatkan adalah sekitar 116.97 MPa. Hasil studi analisis ini sudah sesuai dengan standar sehingga mampu diterapkan di laut dalam Wilayah ZEE Pantai Barat Sumatra, Indonesia.

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This analysis study is an activity to analyze and calculate the strength of the building structure and the environment external load to avoid fatigue failure in planning and designing the Offshore Aquaculture Building. The analysis is being conducted to obtain optimal results, so the building can survive its lifetime design period. To achieve the intended purpose, an analysis of the loading of the Offshore Aquaculture structure such as the wind load, current load, wave load, and total tension of mooring lines afflicted in Offshore Aquaculture. This analysis shall be performed in the operational location, so that as the value of maximum stress is obtained from numerical analysis, Fatigue Life for the whole structure could be calculated. The results of this analysis indicate that during storm conditions, the total force acting on the structure is 10508.16 kN, the total tension of mooring lines in the structure is 122.21 kN, and the structural strength of the structure is approximately 116.97 MPa. The results of this analysis study are all according to the standards, so that it can be applied in the deep sea ZEE region of West Shore of Sumatra, Indonesia."

"Salah satu hal yang menjadi hambatan utama dalam meningkatkan produksi minyak mentah di Indonesia ialah minimnya ketersediaan alat eksplorasi minyak yang dapat mengakomodasi beberapa titik kawasan berpotensi. Semi-submersible platform menjadi salah satu solusi untuk menanggulangi permasalahan tersebut dengan kemampuannya yang dapat berpindah-pindah tempat dibandingkan dengan fixed platform. Dalam perancangannya, diperlukan suatu pengujian stabilitas pada rancangan desain untuk mengetahui kelayakan platform agar dapat bekerja secara optimal.

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One of the things that became an obstacle in increasing the production of crude oil in Indonesia is the lack of availability of oil exploration tool that can potentially accommodate some point region. Semi-submersible platform is a solution to overcome these problems with its ability to move where compared to fixed platforms. In the design process, it is needed to do a stability test to determine the feasibility of the platform in order to work optimally."

"Meningkatnya kebutuhan konsumsi minyak dan gas membuat Indonesia ketergantungan akan transaksi impor minyak mentah terhadap Negara lain. Hal tersebut disebabkan oleh menurunnya tingkat produksi minyak mentah dalam negeri, sehingga kebutuhan bahan bakar minyak tidak dapat terpenuhi meskipun beberapa wilayah di Indonesia memiliki potensi tersebut. Terdapat beberapa wilayah yang berpotensi memiliki sumber cadangan minyak mentah, dimana salah satunya berada di wilayah perairan Laut Arafuru. Namun, ketersediaan alat yang sesuai, menjadi salah satu masalah yang perlu ditangani. Semi-submersible Oil Rig Platform, merupakan jenis platform yang sesuai. Peneliti melakukan perancangan desain dan menyesuaikan dengan lingkungan Laut Arafuru yang berpotensi memiliki 24.36 MMSTB cadangan minyak mentah. Peneliti juga melakukan analisis Loads and Responses, analisis Response Amplitude Operator (RAO) serta melakukan analisis pemilihan Mooring Lines. Sehingga kapabilitas Semi-submersible Platform sesuai dengan lingkungan Laut Arafuru dan kebutuhan minyak mentah Indonesia dapat terpenuhi tanpa harus melakukan transaksi impor ke negara lain.

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The increasingly of oil and gas consumption, make Indonesia dependence to crude oil import transaction with another country. That is caused by decreasingly crude oil production which is the impact of this goes to necessity of oil and gas consumption that can't to be fulfilled. Although, some of territory of Indonesia have a potential of it. There are some territories which are potentially have crude oil resources. And, Arafuru Ocean area is one of them. But, readiness of appropriate tools, is the one of problem that have to be fixed. Semi-submersible Oil Rig Platform is the one of appropriate Platform. So, the researcher make a preliminary design of platform by adjusting the platform that suits with the environmental of Arafuru Ocean which is potentially have 24.36 MMSTB of crude oil. Researcher also analyze the Loads and Responses the Response Amplitude Operator (RAO) and analyzing Mooring Lines Type that have to be choose. With the result of that, the capability of Semi-submersible Platform will suit with the environmental of Arafuru Ocean and the necessity of crude oil will be fulfill without doing import transaction with another country."