Sökning: "torsional vibration"

Visar resultat 1 - 5 av 9 uppsatser innehållade orden torsional 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. Development of method for early fault detection in small planetary gear sets in nutrunners

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Maskinelement

    Författare :Joakim Stenudd; [2021]
    Nyckelord :Condition monitoring; predictive maintenance; planetary gear; signal analysis; product development; fault detection; circular economy;

    Sammanfattning : The objective of this thesis work was to develop a method to detect early damage on small planetary gear sets that are installed in Atlas Copco nutrunners. The project has gone through several stages of product development, from idea to working product and signal analysis. LÄS MER

  4. 3. 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

  5. 4. Dynamic Simulation of a One-Cylinder Engine Test Rig

    Master-uppsats, KTH/Hållfasthetslära (Inst.)

    Författare :Per Sundström; [2017]
    Nyckelord :;

    Sammanfattning : An engine test rig at AVL was redesigned with new components after a failure. The new system consists of a torsional vibration damper, a cardan axle, a torque flange, and an adapter unit, together with a new dynamometer. To ensure another failure would not occur a study of the new system was conducted. LÄS MER

  7. 5. 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