Search for dissertations about: "Other engineering mechanics"

Showing result 1 - 5 of 2191 swedish dissertations containing the words Other engineering mechanics.

  1. 1. Washing Machine Design Optimization Based on Dynamics Modeling

    University dissertation from Chalmers University of Technology

    Author : Thomas Nygårds; Chalmers tekniska högskola.; Chalmers University of Technology.; [2011]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Reglerteknik; Automatic control; Fastkroppsmekanik; Solid mechanics; Konstruktionsteknik; Construction engineering; Övrig teknisk mekanik; Other engineering mechanics; Washing machine; Suspensions; Modeling; Experiments; Vibration dynamics; Multiobjective Optimization; Automatic balancing; Semi-active control.;

    Abstract : The spinning process in a washing machine is a source of undesired vibrations and noise and may cause discomfort both to the user as well as for the machine itself due to vibrations which have impact on system lifetime, reliability of operation and capacity. The aim of this thesis is to develop mathematical and computational models of a washing machine of modern type and use these models for dynamics analysis and in optimization routines to make improvements of the machine mechanical design. READ MORE

  2. 2. Multi-objective optimization of railway bogie suspension damping

    University dissertation from Chalmers University of Technology

    Author : Albin Johnsson; Chalmers tekniska högskola.; Chalmers University of Technology.; [2011]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Optimeringslära; systemteori; Optimization; systems theory; Farkostteknik; Vehicle engineering; Fastkroppsmekanik; Solid mechanics; Övrig teknisk mekanik; Other engineering mechanics; Multi-objective optimization; Railway vehicle dynamics; Bogie suspension design; Pareto optimized bogie primary and secondary suspensions damping;

    Abstract : In this thesis multi-objective optimization is used to find Pareto fronts showing the set of optimized damping parameters of primary and secondary bogie suspensions. Special interests are put on requirements to enhance safety and comfort of a railway vehicle. READ MORE

  3. 3. Towards active engine mounting systems for commercial vehicles: modeling and analysis

    University dissertation from Chalmers University of Technology

    Author : Hoda Yarmohamadi; Chalmers tekniska högskola.; Chalmers University of Technology.; [2009]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Teknisk mekanik; Engineering mechanics; Farkostteknik; Vehicle engineering; Övrig teknisk mekanik; Other engineering mechanics; Commercial vehicles; Conventional engine mount; Computational model; Nonlinear dynamic stiffness and damping; Vibration isolation; Model errors tolerance; Adaptronic mounting system; Actuators;

    Abstract : The vehicle engine mounting system, which consists of several mounts connecting the engine to the vehicle structure, not only supports the weight of the engine but also isolates the noise, vibration and the transmitted forces to the vehicle structure. At present conventional elastomeric mounts are widely used in engine mounting systems for commercial vehicles. READ MORE

  4. 4. Adhesive Joining for Crashworthiness -Material Data and Explicit FE-methods

    University dissertation from Chalmers University of Technology

    Author : Thomas Carlberger; Högskolan i Skövde.; Chalmers tekniska högskola.; Chalmers University of Technology.; [2008]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TECHNOLOGY Materials science; TEKNIKVETENSKAP Teknisk materialvetenskap; Technology; Teknik; Adhesive joining; Dynamic fracture; Cohesive zone; Interphase Element; Bimaterial joining; Hybrid joints; Teknisk mekanik; Engineering mechanics; Farkostteknik; Vehicle engineering; Fastkroppsmekanik; Solid mechanics; Adhesive joining; Dynamic fracture; Cohesive zone; Interphase Element; Bi-material joining; Hybrid joints;

    Abstract : Today, crash simulations replace crash testing in the product development phase in theautomotive industry. High quality simulations enable shorter product development time andhigher competitiveness. READ MORE

  5. 5. Numerical Simulations of Flows around Trains and Buses in Cross Winds

    University dissertation from Chalmers University of Technology

    Author : Hassan Hemida; Chalmers tekniska högskola.; Chalmers University of Technology.; [2008]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Övrig samhällsbyggnadsteknik och arkitektur; Other civil engineering and architecture; Farkostteknik; Vehicle engineering; Mekanisk energiteknik; Mechanical energy engineering; Strömningsmekanik; Fluid mechanics; winds; LES; DES; Trains and buses aerodynamics;

    Abstract : When cruising in strong winds, ground vehicles can experience strong aerodynamic forces and moments that may increase drag, reduce their stability, generate noise and induce accidents in the case of strong side winds. However, prevention of the unwanted influences of side winds requires that the flow structures around vehicles are fully understood in both the instantaneous and time-averaged flow. READ MORE