Department of Mechanical and Structural Engineering and Materials Science (TN-IMBM): Nye registreringer
Viser treff 641-660 av 1741
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Studie om Ammoniakk som energibærer på skip og offshoreinstallasjoner.
(Bachelor thesis, 2022)I denne bacheloroppgaven ble det sett på ammoniakk og LNG som energibærere til fartøyer og offshoreinstallasjoner som fremtidens drivstoff. Ammoniakk er under utprøving, mens LNG er allerede et etablert drivstoff. For å ... -
Investigation of Rotor Efficiency with Varying Rotor Pitch Angle for a Coaxial Drone
(Peer reviewed; Journal article, 2022-04)Coaxial rotor systems are appealing for multirotor drones, as they increase thrust without increasing the vehicle’s footprint. However, the thrust of a coaxial rotor system is reduced compared to having the rotors in line. ... -
Exploration of Mechanical Properties of Enset–Sisal Hybrid Polymer Composite
(Peer reviewed; Journal article, 2022-02)Enset and sisal fibers are among the most widely used reinforcement to fabricate natural fiber-based composite materials. Hand lay-up techniques were employed in this study to fabricate enset–sisal (E/S) hybrid fiber ... -
Development of Advanced Numerical Tools for Dynamic Analysis of Aquaculture Structures
(PhD thesis UiS;, Doctoral thesis, 2022-04)Numerical methods to accurately predict dynamic responses of marine aquaculture structures are essential in the engineering design process, because these structures can be subjected to large wave and current loads in the ... -
Bridge buffeting by skew winds: A revised theory
(Peer reviewed; Journal article, 2021-01)An improved bridge buffeting theory is established with an emphasis on skew wind directions, for both turbulence- and motion-dependent forces. It provides simplifications and generalizations of previously established ... -
Determining Optimum Rotary Blade Design for Wind-Powered Water-Pumping Systems for Local Selected Sites
(Peer reviewed; Journal article, 2021)The design of a windmill rotor is critical for harnessing wind energy. In this work, a study is conducted to optimize the design and performance of a rotor blade that is suitable for low wind conditions. The windmills’ ... -
Bridge deck aerodynamics: A case study in full-scale
(PhD thesis UiS;, Doctoral thesis, 2022-04)One of the key aspects of bridge deck aerodynamics is the transformation of the incident wind flow into fluctuating surface pressures around a bridge deck. The atmospheric turbulence generates fluctuating loads on bridge ... -
Development of a coupling algorithm for fluid-structure interaction analysis of submerged aquaculture nets
(Peer reviewed; Journal article, 2021-12)A coupling algorithm between two open-source numerical toolboxes, i.e., OpenFOAM and Code_Aster, is implemented for fluid-structure interaction analysis of submerged nets. This algorithm is developed to handle the wake ... -
Case Study on Lean Manufacturing
(Master thesis, 2022)Technological companies are struggling to keep competing in the global market. Customers have higher expectations now that an efficient and high-quality product is no longer sufficient. For example, Laerdal has to offer ... -
Duplex steel welding in arctic conditions – Correlation of welding parameters in relation to HISC
(Master thesis, 2021)The second part of XX century has taken a large part of Oil & Gas production to the offshore. The processes and equipment used inland, had to be adapted and optimized for severe marine and subsea conditions. In order to ... -
Technical- and Economic-Feasibility Analysis of Subsea Shuttle Tanker
(Master thesis, 2021)This thesis presents the technical and economic feasibility analysis of the subsea shuttle tanker (SST). The SST is proposed as an alternative to subsea pipelines and surface tankers with the primary purpose of transporting ... -
Analysis and characterization of swell wave energy converters
(Master thesis, 2021)In this thesis, a framework for design and characterization of wave energy converters is presented. The theories needed for formulating the ocean wave forces and power take off and control forces are given and the equations ... -
Comparative study of five commonly used gravity type fish cages under pure current conditions
(Peer reviewed; Journal article, 2022-04)Gravity type fish cages have been commonly used in marine aquaculture for years. However, only limited research efforts have been made to assess the influences of different design parameters on the structural responses of ... -
Comparative study of circular and square gravity-based fish cages with different dimensions under pure current conditions
(Peer reviewed; Journal article, 2021-12)Two typical gravity-based fish cages with circular and square shapes are modeled in the present study to compare their cage deformations, cultivation volumes and drag forces under different pure current conditions. Two hy ... -
Machine Learning Approach for Risk-Based Inspection Screening Assessment
(Peer reviewed; Journal article, 2019-05)Risk-based inspection (RBI) screening assessment is used to identify equipment that makes a significant contribution to the system's total risk of failure (RoF), so that the RBI detailed assessment can focus on analyzing ... -
Kvasir-Instruments and Polyp Segmentation Using UNet
(Journal article, 2021-11)This paper aims to describe the methodology used to develop, fine-tune and analyze a UNet model for creating masks for two datasets: Polyp Segmentation and Instrument Segmentation, which are part of MedAI challenge. For ... -
Exploring of the incompatibility of marine residual fuel: A case study using machine learning methods
(Peer reviewed; Journal article, 2021-12)Providing quality fuel to ships with reduced SOx content is a priority task. Marine residual fuels are one of the main sources of atmospheric pollution during the operation of ships and sea tankers. Hence, the International ... -
Modellering og statisk analyse av limtrekonstruksjoner
(Bachelor thesis, 2021) -
Numerical simulation of oxygen transport in land-based aquaculture tank
(Peer reviewed; Journal article, 2021-10)Dissolved oxygen is an important indicator of the water quality and important for fish survival in aquaculture. The distribution of the dissolved oxygen is highly dependent on the flow motions, the pressure and the temperature ... -
Challenges and opportunities of marine propulsion with alternative fuels
(Peer reviewed; Journal article, 2021-06)The increasingly stringent shipping emissions regulations and global decarbonisation movement have prompted the adoption of alternative fuels in the shipping industry. This review presents the performance results and ...