Sökning: "Torsional modes of vibration"

Hittade 4 uppsatser innehållade orden Torsional modes of vibration.

  1. 1. Investigation of torsion modes in overhead traveling cranes: : Reviewing the ISO 22980 standard

    Master-uppsats, Linnéuniversitetet/Institutionen för maskinteknik (MT)

    Författare :Simon Jens; [2023]
    Nyckelord :Overhead traveling crane; Finite element method; Frequency and experimental vibration analysis; Travers; finita elementmetod; egenfrekvensanalys; experimentell vibrationsanalys;

    Sammanfattning : Overhead cranes and rail mountings in the wall are subjected to vibrations whenlifting equipment. The purpose of this thesis is to review if the minimum frequencyvalue for cranes, according to the ISO 22986:2007 standard is conservative whendesigning overhead traveling cranes. LÄS MER

  3. 2. Conceptual Dynamic Analysis of a Vehicle Body

    Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Byggnadsmekanik; Lunds universitet/Institutionen för byggvetenskaper

    Författare :Björn Pedersen; [2018]
    Nyckelord :Technology and Engineering;

    Sammanfattning : The noise, vibration and harshness (NVH) and body dynamic performance of automotive vehicles is highly dependent of the components included in the body structure and compartment, since they add mass, stiffness and damping to the overall structure. Today, the noise levels in the compartment are predicted using complex and detailed computational models during both early and late stages of the vehicle development process. LÄS MER

  4. 3. Evaluation of 3D dynamic effects induced by high-speed trains on double-track slab bridges

    Master-uppsats, KTH/Bro- och stålbyggnad

    Författare :Jossian Thomas; Assís Arañó Barenys; [2016]
    Nyckelord :Dynamics; Frequency analysis; 3D model; Torsional modes of vibration;

    Sammanfattning : In addition to a static design, a dynamic analysis has to be performed for bridges for which the maximum permissible train speed exceeds 200 km/h. This analysis requires a lot of computing time, for this reason Svedholm and Andersson (2016) have developed a simple tool describing the relationship between the first eigenfrequency of the bridge, the span length and the minimum mass to fulfill the regulation specified in EN-1990. LÄS MER

  5. 4. Wind turbine blade modeling - setting out from experimental data

    Magister-uppsats, Institutionen för maskinteknik (MT)

    Författare :Mathias Kleinknecht; Alfredo Fernández Álvarez; [2013]
    Nyckelord :Wind turbine blade; Experimental modeling; Substructuring; Modal analysis; Tensile testing; Model Assurance Criterion;

    Sammanfattning : Complex systems can be divided into simpler substructures. Determining the properties of each subcomponent by experimental procedures is practical and can serve to verify or calibrate finite element models. In this work, an existing model of a wind turbine blade was improved by use of experimental data. LÄS MER