Sökning: "dynamic stiffness and damping"

Visar resultat 1 - 5 av 44 uppsatser innehållade orden dynamic stiffness and damping.

  1. 1. Dynamic Analysis of Portal Frame Bridges for High-Speed Trains : A Parametric Study

    Master-uppsats, KTH/Bro- och stålbyggnad

    Författare :Antonio Dib; Ramayana Salgado; [2023]
    Nyckelord :;

    Sammanfattning : A high-speed railway network is important for Sweden’s development. However, anincreasing train speed brings new challenges in bridge design due to higher bridgeaccelerations. LÄS MER

  3. 2. Design, Modeling, and Testing of a Force Feedback Haptic Device for Simulated Robot Interaction

    Master-uppsats, Linköpings universitet/Institutionen för systemteknik

    Författare :Patrik Lindström; [2023]
    Nyckelord :Force Feedback; Impedance Control; PD-gain; Dynamic Behavior; Closed-chain; Master-Slave; Parallel Manipulator; Kinematics Redundancy; Mass-Spring-Damper; Position Control; Current Control; Modeling; Design; Joints; Delta robot; Differential Equations; External Torques; Kinematics; Forward Kinematics; Inverse Kinematics; Dynamic Matrices; Jacobian; URDF; Haptics; Haptic Device; Solidworks; CAD; Maxon Motors; EtherCAT; Beckhoff;

    Sammanfattning : Haptic feedback is a growing phenomenon that incorporates the sense of touch through tactile sensations such as vibrations, electrical signals, air pressure, and sound waves or through force feedback, which employs torques and/or forces to replicate the pressure and weight of a simulated object. Utilizing haptic technology establishes a communication bridge between the user and the technical component, enhancing the user's understanding of the technical component's surroundings. LÄS MER

  4. 3. Assessment of Ground Vibration for Early-Stage Design

    Master-uppsats, KTH/Bro- och stålbyggnad

    Författare :Fadi Rafea Jameel Jameel; Patrick Francesco Joseph; [2022]
    Nyckelord :;

    Sammanfattning : Ground borne vibrations in urban areas can be caused by human activities such as railwayand road traffic, construction works and industrial manufacturing. These vibrations can playa significant role in human comfort and the disruption of vibration sensitive equipment inbuildings. LÄS MER

  5. 4. Reliability-Based Sensitivity Analysis of the Dynamic Response of Railway Bridges

    Master-uppsats, KTH/Bro- och stålbyggnad

    Författare :Hasan Al-Zubaidi; [2022]
    Nyckelord :Railway bridges; High-speed trains; Simply supported beam; Global sensitivity analysis; Uncertainty quantification; Reliability; Ballast instability; Running safety; Passenger comfort;

    Sammanfattning : In response to the planned increase in operational speeds and axle loads of passengertrains that may lead to resonance-induced excessive vibrations in railway bridges,recent studies examined the reliability of bridges concerning train running safety andpassenger comfort limit states. In this respect, valuable information regarding theimportance of input variables can be obtained by conducting Sensitivity Analysis (SA). LÄS MER

  7. 5. Spectral density approach for dynamic analysis of high-speed railway bridges

    Master-uppsats, KTH/Bro- och stålbyggnad

    Författare :Alket Ciku; Vlad Gavriliuc; [2022]
    Nyckelord :;

    Sammanfattning : The focus of this thesis is to introduce the concept of train signature in the spectraldensity approach used in the dynamic analysis of simply-supported railway bridges.Due to the increased transportation demands, longer trains with higher axles loadsand top speeds are being developed. LÄS MER