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Hasil Pencarian

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Bastian Okto Bangkit Sentosa
"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.

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."
2012
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UI - Tesis Membership  Universitas Indonesia Library
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Anggara Putra
"[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]"
Universitas Indonesia, 2015
T44238
UI - Tesis Membership  Universitas Indonesia Library
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Pane, Muhammad Razi Ihram
"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."
Depok: Fakultas Teknik Universitas Indonesia, 2024
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UI - Skripsi Membership  Universitas Indonesia Library
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"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. "
Artikel Jurnal  Universitas Indonesia Library
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"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."
Switzerland: Springer Nature, 2019
e20509347
eBooks  Universitas Indonesia Library
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"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."
Switzerland: Springer Cham, 2019
e20501122
eBooks  Universitas Indonesia Library
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"This volume contains the proceedings of the 11th International Conference on Structural Analysis of Historical Constructions (SAHC) that was held in Cusco, Peru in 2018. It disseminates recent advances in the areas related to the structural analysis of historical and archaeological constructions. The challenges faced in this field show that accuracy and robustness of results rely heavily on an interdisciplinary approach, where different areas of expertise from managers, practitioners, and scientists work together.
Bearing this in mind, SAHC 2018 stimulated discussion on the new knowledge developed in the different disciplines involved in analysis, conservation, retrofit, and management of existing constructions. This book is organized according to the following topics: assessment and intervention of archaeological heritage, history of construction and building technology, advances in inspection and NDT, innovations in field and laboratory testing applied to historical construction and heritage, new technologies and techniques, risk and vulnerability assessments of heritage for multiple types of hazards, repair, strengthening, and retrofit of historical structures, numerical modeling and structural analysis, structural health monitoring, durability and sustainability, management and conservation strategies for heritage structures, and interdisciplinary projects and case studies.
This volume holds particular interest for all the community interested in the challenging task of preserving existing constructions, enable great opportunities, and also uncover new challenges in the field of structural analysis of historical and archeological constructions."
Switzerland: Springer Cham, 2019
e20502410
eBooks  Universitas Indonesia Library
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Muhamad Rashif Athallah Nurianto
"Pelat kapal, terutama yang digunakan dalam struktur dewi-dewi, harus memiliki kualitas tinggi dan ketahanan terhadap korosi di lingkungan laut untuk menjamin keselamatan operasional. Penelitian ini bertujuan untuk mengkaji perilaku korosi dan karakteristik permukaan pelat dewi-dewi yang terpapar korosi air laut melalui pengujian eksperimental dan tervalidasi melalui pemodelan numerik. Pengujian tarik dilakukan untuk menentukan karakteristik sifat mekanik dari material dewi-dewi, termasuk tegangan yield, tegangan maksimum, regangan saat patah, dan modulus elastisitas. Pengamatan morfologi permukaan dilakukan dengan menggunakan 3D laser scan dna pembuatan model sederhana. Simulasi numerik melibatkan pembuatan model 3D spesimen terkorosi menggunakan 3D Laser Scan dan perangkat lunak Inventor. Hasil penelitian menunjukkan bahwa spesimen terkorsi memiliki yield stress sebesar 94.226 MPa. Selain itu, pemodelan numerik mengindikasikan area dengan konsentrasi tegangan tinggi yang rentan terhadap kegagalan struktural. Faktor keamanan dihitung sebesar 0.537, yang dmenunjukkan bahwa materil dewi-dewi terkorosi tidak memiliki kekuatan yang cukup untuk menahan beban yang diterapkan tanpa mengalami perubahan ataupun kerusakan.

Ship plates, especially those used in dewi-dewi structures, must have high quality and corrosion resistance to ensure operational safety. This study aims to examine the corrosion behavior and surface characteristics of dewi-dewi plates exposed to seawater corrosion through experimental testing and validation via numerical modeling. Tensile tests were conducted to determine the mechanical characteristics of the material, including yield strength, ultimate tensile strength, elongation at fracture, and modulus of elasticity. Surface morphology observations were conducted using 3D laser scanning. Numerical simulation involved creating a 3D model of the corroded specimen using 3D Laser Scanning and Inventor software. The research results indicate that the corroded specimen has a yield stress of 94.226 MPa. Additionally, numerical modeling indicates areas with high stress concentration that are prone to structural failure. The safety factor was calculated to be 0.537, indicating that the corroded material does not have sufficient strength to withstand the applied load without damage."
Depok: Fakultas Teknik Universitas Indonesia, 2024
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UI - Skripsi Membership  Universitas Indonesia Library