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Abstrak :
ABSTRAK
Penelitian ini mencoba untuk membuat model numeik dan memilih parameter yang sesuai dari data eksperimental dari sistem angkur pada beton pada tahun 2007 di LGCIE INSA Lyon. Dalam penelitian ini menggunakan metod elemen hingga dengan software CAST3M yang mana elemen yang digunakan 2D. Ada dua elemen penting, pertama elemen beton berupa QUA4 dan elemen baja terbentuk dari elemen BARR. Rangkaian elemen ini terbentuk dari 3 ukuran untuk melihat konvergensi dari perhitungan.

Hasil ditunjukkan pada kurva gaya-perpindahan dan diagram teganganregangan. Hasil gaya maksimal yang muncul dekat satu sama lain yaitu 251.25- 258.62 kN dan juga perpindahan maksimum ialah 12mm. Angkur pada beton ini runtuh pada baja sesuai dengan hasil eksperimental.

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ABSTRACT
This internship wants to try building a model of numeric and choice the right parameter from the experimental data of anchor system in concrete in 2007 at LGCIE INSA Lyon. It uses the finite element method in software CAST3M which the elements are in 2D. There are two elements important, firstly concrete element is taken from QUA4 and after for steel element is formed by element BARR. The mesh is formed in 3 sizes for regarding the calculation convergence.

Results are shown in force-displacement curve and stress-deformation diagram. The maximum forces which appear are close to each other, that are 251.25-258.62 kN and also the maximum displacement are 12mm. The concrete anchor is failed by shank fracture that is similar with the results of experimental.

Abstrak :
[Lapangan Brian terletak pada bagian selatan Delta Mahakam dengan struktur geologi antiklin dengan sesar. Setelah 40 tahun diproduksi, lapangan ini memerlukan strategi pengembangan lapangan yang baru untuk meningkatkan produksi. Zona dangkal merupakan kandidat kuat untuk target produksi selanjutnya. Untuk merencanakan strategi pengembangan lapangan selanjutnya, diperlukan pemahaman karakterisasi reservoir & cadangan estimasi yang baik, penelitian ini mengusulkan metode yang mengintegrasikan geofisika, petrofisika dan pemodelan reservoar. Langkah-langkah penelitian yang telah dilakukan antara lain; 1) rekonstruksi struktur geologi bawah permukaan sebagai referensi pemodelan struktur 3 dimensi, 2) rekonstruksi distribusi facies dan zona prospek hidrokarbon menggunakan atribut RMS dan Analisis AVO, (3) perhitungan volume hidrokarbon. Hasil dari analisis AVO dapat menunjukkan respon gas yang cukup jelas pada reservoar E10-3, selanjutnya peta penyebaran facies batupasir channel di interpretasi dengan menggunakan atribut RMS seismik. Dengan pemodelan numerik reservoar pada reservoar E10-3 didapatkan cadangan gas yang ekonomis. Berdasarkan analisis AVO & pemodelan numerik reservoar, optimalisasi target sumur baru dapat dilakukan pada reservoar E10-3 di kedalaman -1000 mdpl agar dapat meningkatkan produksi hidrokarbon Lapangan Brian khususnya zona dangkal.;Brian Field is located in the southern part of the Mahakam Delta with geological structure of anticline with fault. After 40 years of production, this field requires field development of new strategies to improve production. Shallow Zone is a strong candidate for the next production targets. To plan a strategy of further field development, reservoir characterization and understanding required reserve estimates are good, this study proposes a method that integrates geophysical, petrophysical and reservoir modeling. The steps of research that has been conducted, among others; 1) reconstruction of the subsurface geological structure as the reference for the 3-dimensional modelling, 2) reconstruction of the facies distribution and hydrocarbon prospects Zone using RMS attributes and RMS AVO analysis, (3) calculation of hydrocarbon volumes. The results of the AVO analysis can show quite clearly that the gas response on the E10-3 reservoir, and then channel sandstone facies map distribution interpreted by using RMS seismic attributes. With reservoir numerical modeling in reservoir E10-3, resulting an economical gas reserves. Based on AVO analysis and numerical reservoir modeling, optimization targets new well can be done on Reservoir E10-3 in depth -1000mTVDSS in order to increase the production of hydrocarbons, especially Shallow Zone Brian Fields, Brian Field is located in the southern part of the Mahakam Delta with geological structure of anticline with fault. After 40 years of production, this field requires field development of new strategies to improve production. Shallow Zone is a strong candidate for the next production targets. To plan a strategy of further field development, reservoir characterization and understanding required reserve estimates are good, this study proposes a method that integrates geophysical, petrophysical and reservoir modeling. The steps of research that has been conducted, among others; 1) reconstruction of the subsurface geological structure as the reference for the 3-dimensional modelling, 2) reconstruction of the facies distribution and hydrocarbon prospects Zone using RMS attributes and RMS AVO analysis, (3) calculation of hydrocarbon volumes. The results of the AVO analysis can show quite clearly that the gas response on the E10-3 reservoir, and then channel sandstone facies map distribution interpreted by using RMS seismic attributes. With reservoir numerical modeling in reservoir E10-3, resulting an economical gas reserves. Based on AVO analysis and numerical reservoir modeling, optimization targets new well can be done on Reservoir E10-3 in depth -1000mTVDSS in order to increase the production of hydrocarbons, especially Shallow Zone Brian Fields]

Abstrak :
Peningkatan populasi global dan industrialisasi menyebabkan peningkatan konsumsi energi yang signifikan, dimana bahan bakar fosil menyumbang lebih dari 75% emisi gas rumah kaca. Sehingga, transisi ke energi terbarukan menjadi sangat penting. Energi angin, yang memiliki efisiensi tinggi dan tidak menghasilkan polusi udara, dipilih sebagai fokus penelitian ini. Di Indonesia, potensi energi angin sangat besar, namun pemanfaatannya masih di bawah target yang ditetapkan. Wind turbine, yang komponen utamanya terbuat dari material komposit karena rasio kekuatan terhadap beratnya yang unggul, menjadi pilihan utama dalam produksi energi angin. Penelitian ini bertujuan untuk memvalidasi model material komposit menggunakan Ansys Composite PrepPost (ACP) dengan mempertimbangkan parameter seperti ketebalan, orientasi, dan jenis material, serta menganalisis pengaruhnya terhadap rasio kekuatan terhadap berat. Penelitian ini menyajikan analisis numerik sifat mekanik komposit CFRP dan GFRP menggunakan perangkat lunak ANSYS. Studi ini memodelkan 16 model komposit dengan variasi orientasi fiber (0°, 30°, 45°, 90°), konsentrasi fiber (50%, 75%), dan jenis material (Carbon Fiber dan Glass Fiber. Analisis Strength to Weight Ratio juga dilakukan untuk menentukan model optimal dimana model nilai tertinggi adalah model 4 dengan nilai 32,076 MPa/Kg. ......The increasing global population and industrialization have led to a significant rise in energy consumption, with fossil fuels contributing more than 75% of greenhouse gas emissions. Therefore, the transition to renewable energy has become crucial. Wind energy, known for its high efficiency and lack of air pollution, is the focus of this research. In Indonesia, wind energy potential is substantial, yet its utilization remains below set targets. Wind turbines, whose main components are made of composite materials due to their superior strength-to-weight ratio, are a primary choice for wind energy production. This study aims to validate composite material models using Ansys Composite PrepPost (ACP), considering parameters such as thickness, orientation, material type, and analyzing their influence on the strength-to-weight ratio. The research presents numerical analyses of the mechanical properties of CFRP and GFRP composites using ANSYS software. Sixteen composite models were simulated with variations in fiber orientation (0°, 30°, 45°, 90°), fiber concentration (50%, 75%), and material type (Carbon Fiber and Glass Fiber). Strength-to-Weight Ratio analysis was also conducted to identify the optimal model, where model 4 achieved the highest value of 32,076 MPa/kg.

Abstrak :
An improved formula for th eassessment of the external thermal resistance of three buried single-core, metal-sheathed, touching cables, laid in a flat formation, is proposed. The formula arises from the analysis based on a coupled electric- thermal model, as well as on the stochastic optimization method based on differential evolution. The effect of the new formula on cable rating is illustrated in a numerical example.

Abstrak :
This book contains selected papers of the 11th OpenFOAM® Workshop that was held in Guimarães, Portugal, June 26-30, 2016. The 11th OpenFOAM® Workshop had more than 140 technical/scientific presentations and 30 courses, and was attended by circa 300 individuals, representing 180 institutions and 30 countries, from all continents. The OpenFOAM® Workshop provided a forum for researchers, industrial users, software developers, consultants and academics working with OpenFOAM® technology. The central part of the Workshop was the two-day conference, where presentations and posters on industrial applications and academic research were shown. OpenFOAM® (Open Source Field Operation and Manipulation) is a free, open source computational toolbox that has a larger user base across most areas of engineering and science, from both commercial and academic organizations. As a technology, OpenFOAM® provides an extensive range of features to solve anything from complex fluid flows involving chemical reactions, turbulence and heat transfer, to solid dynamics and electromagnetics, among several others. Additionally, the OpenFOAM technology offers complete freedom to customize and extend its functionalities.

Abstrak :
This book provides a State of the Art Report (STAR) produced by RILEM Technical Committee 254-CMS ‘Thermal Cracking of Mas-sive Concrete Structures’. Several recent developments related to the old problem of understanding/predicting stresses originated from the evolution of the hydration of concrete are at the origin of the creation this technical committee. Having identified a lack in the organization of up-to-date scientific and technological knowledge about cracking induced by hydration heat effects, this STAR aims to provide both practitioners and scientists with a deep integrated overview of consolidated knowledge, together with recent developments on this subject.