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Showing result 1 - 5 of 112 essays matching the above criteria.

  1. 1. Adapted data collection in field utilizing RMR and the Q-system

    University essay from Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

    Author : Amanda Olsson; [2024]
    Keywords : Rock mass classification; Q-slope; SMR; Slope stability;

    Abstract : The focus on slope stability has increased rapidly in Norway over the last years due to several unwanted landslides. In Norway, the most used method today to classify the rock mass and to determine the required reinforcement, is the Q-system. In addition to that the RMR method is also a commonly used method. READ MORE

  3. 2. Rock Wedge Stability Assessment : A Comparative Analysis of Limit Equilibrium and Discrete Element Methods

    University essay from Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

    Author : Vilma Nordh; [2024]
    Keywords : Numerical modelling; wedge stability; 3DEC; UnWedge;

    Abstract : Rock wedge stability is a common concern in underground excavations. Since the wedge stability influences the support design, it is important to use a wedge stability analysis method that can capture factors like excavation geometry, joint parameters and properties, rock mass properties, rock cover, and stress field as accurately as possible. READ MORE

  4. 3. Drop-weight impact tests on reinforced concrete beams

    University essay from KTH/Betongbyggnad

    Author : John Abdalnour; Milad Saliba; [2023]
    Keywords : ;

    Abstract : This master's thesis aimed to investigate the behaviour of reinforced concrete beams under dynamic loading conditions, specifically focusing on understanding shear failure. The study was conducted with KTH Royal Institute of Technology, the Swedish Fortifications Agency, and Tyréns. READ MORE

  5. 4. Tribological characterization of a ball bearing subjected to an electric field : Electric drivetrain tribology

    University essay from Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Author : Muhammad Umar Farooq; [2023]
    Keywords : Ball bearing; electric drivetrain; tribology; electric field; characterization; bearing currents; discharge;

    Abstract : Electric machines are widely used in for instance the automotive industry in electric vehicles and in wind turbines. The electrical machines have mechanical bearings as an integral part used to transmit power and load. In addition, the main function includes reducing friction between interacting surfaces. READ MORE

  6. 5. Understanding the Relation between Wind Power Output and Strategic Withholding through Production Failures: Evidence from Diversified Producers in Sweden

    University essay from Handelshögskolan i Stockholm/Institutionen för nationalekonomi

    Author : William Stålhök; Knut Örnéus; [2023]
    Keywords : Production Failures; Wind Power; Market Power; Strategic Withholding; Merit Order Effect;

    Abstract : Previous research provide partial evidence for electricity producers utilizing production failures to disguise the strategic withholding of capacity as well as evidence of diversified electricity producers counteracting the price-reducing effect of the merit order through capacity withholding. In this study, we investigate whether an increased supply of wind power affects the number of reported unplanned production failures among diversified producers in Sweden, thus suggesting this being one of the specific mechanisms with which producers counteract the merit order effect. READ MORE