Sökning: "Finite element model"

Visar resultat 1 - 5 av 684 avhandlingar innehållade orden Finite element model.

  1. 1. Modelling Alternative Load Paths in Platform-Framed CLT Buildings A Finite Element Approach

    Detta är en avhandling från Luleå : Luleå University of Technology

    Författare :Johannes Albert Josef Huber; Luleå tekniska universitet.; [2019]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; timber; robustness; finite element method; alternative load paths; disproportionate collapse; Träteknik; Wood Science and Engineering;

    Sammanfattning : Timber has become more popular as a construction material during recent years. Engineered wood products, such as glued laminated timber and cross-laminated timber, have enabled the construction of multi-storey buildings. Tall buildings with many occupants need to resist a disproportional collapse in case of unexpected exposures, e.g. LÄS MER

  2. 2. Localization of Finite Element Model Errors : Error Criteria and Identifiability

    Detta är en avhandling från Göteborg : CTHB

    Författare :Andreas Larsson; [1999]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Error Localization Finite Element Model Updating; Maskinteknik; Mechanical Engineering;

    Sammanfattning : .... LÄS MER

  3. 3. Model Adaptivity in Elasticity

    Detta är en avhandling från Göteborg : Chalmers University of Technology

    Författare :David Heintz; Göteborgs universitet.; Gothenburg University.; [2008]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; finite element method; dimension reduction; a posteriori error; model error; model adaptivity;

    Sammanfattning : We consider model adaptivity in elasticity for dimensionally reduced forms, and shall treat different conceptual approaches. The basic idea, however, is to adaptively refine, not only the computational mesh, but also the underlying mathematical formulation. LÄS MER

  4. 4. Active Muscle Responses in a Finite Element Human Body Model

    Detta är en avhandling från Göteborg : Chalmers University of Technology

    Författare :Jonas Östh; [2010]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; feedback control; autonomous braking; finite element; human body model; active muscle; posture maintenance; reflexive response;

    Sammanfattning : The development of automotive safety systems is moving towards an integration of systems thatare active before and during an impact. Consequently, there is a need to make a combinedanalysis of both the pre-crash and the in-crash phases, which leads to new requirements forHuman Body Models (HBMs) that today are used for crash simulations. LÄS MER

  5. 5. Stochastic model updating and model selection with application to structural dynamics

    Detta är en avhandling från Göteborg : Chalmers University of Technology

    Författare :Majid Khorsand Vakilzadeh; [2016]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Finite element model; Bayesian model selection; Bayesian model updating; stochastic simulation; Bootstrapping; Subspace system identification; Uncertainty quantification;

    Sammanfattning : Uncertainty induced by our incomplete state of knowledge about engineering systems and their surrounding environment give rise to challenging problems in the process of building predictive models for the system behavior. One such challenge is the model selection problem, which arises due to the existence of invariably multiple candidate models with different mathematical forms to represent the system behavior, and so there is a need to assess their plausibility based on experimental data. LÄS MER